Lage Manufacturing, L.L.C. Frequently Asked Questions

M-11/9 Related Questions:
+Where can I find the original manual for the M-11/9?

The manual can be downloaded HERE

+What kind of magazine does the MAX-11 mk2 take?

The MAX-11 mk2 uses double stack, single feed, 32rd steel magazines. They can be purchase on our website HERE.

You can also use plastic Zytel or Pro Mags, but we recommend metal magazines for their reliability and durability.

+Where can I buy M31 Suomi Drum Magazines for my MAX-31, MAX-31 mk2, MAX-31A or MAX-31A mk2?

The M31 Drum Magazines are available from a few online stores. Their condition and price can vary greatly.

We have found the following online stores to have a regular stock of the 72rd Suomi Drum Magazines:

Numrich Gun Parts sells used drum magazines under part # 383830A. As of 7/10/17 their price is $59.95. Their website is and the magazines can be purchased HERE

Centerfire Systems sells used drum magazines under part #M31DRUM. As of 7/10/17 their price is $49.99. Their website is and the magazines can be purchased HERE

Please note: The 36rd Suomi Stick mags will not work in our Uppers without major modification. However, 50rd "Coffin" magazines will work, but they are a hard to find item. You will most likely find these at gun shows or gun auctions , if you're lucky. We also sell 30rd Stick Magazines that were made specifically for these Uppers HERE

+Will your Uppers work in STEN modified magwells?

Yes, they will work without any modification.

+How can I get rid of gas blowback when shooting suppressed?

We sell an Internal Gas Block that works with our MAX-11 mk2 and MAX-31 mk2 Uppers to reduce the amount of gasses directed towards your face when shooting suppressed.

+My ZMAG's are hitting the bolt. What do I do?

Marty from Shockwave Technologies says "We designed the ZMAGs such that they will rub for some. This was intentional, as we wanted to ensure we had the bullets as high up as possible as the bolt strips them from the magazine. If your bolt still closes with the ZMAGs inserted, you should be good to go. The only hiccup we've seen is where a ZMAG might sit too high in a particular gun such that the bolt hits the feedlips and stops dead in its tracks. Obviously, that's not gonna work. Work your bolt over an empty mag 50 times. Then take it out and fire it. You'll be happy. "

+What's the difference between the MAX-11 mk2 and the MAX-11k?

The MAX-11K is a shortened version of the MAX-11 mk2 with a built in K-Grip. The rate of fire is slightly faster too. The benefit is that it is more compact and some people prefer the slightly faster rate of fire. The benefit of the MAX-11 mk2 is the slower rate of fire and a bottom rail for mounting a forward grip.

Here are the exact comparisons:

MAX-11K rate of fire is about 740 RPM and can be increased up to 1140 RPM with VBS-3. MAX-11 mk2 rate of fire is about 670 RPM and can be increased up to 950 RPM with VBS-3.

MAX-11K is 3" shorter (12.23" long versus the MAX-11 mk2's 15.21").

MAX-11 mk2 has a built in foregrip with a bottom rail that allows you to mount grips. MAX-11K has a built in K-Grip with no bottom rail.

MAX-11 mk2 has an 8" barrel threaded 1/2-28 with a birdcage flash hider. MAX-11K has a 5-3/4" barrel threaded 1/2-28 with a bullnose thread protector.

+My MAX-31, MAX-31A, MAX-31 mk2, MAX-31A mk2 or MAX-31k Upper is stuck on my Lower. What should I do?

Hold the pistol grip with one hand and squeeze the trigger and hold it back. Keep holding the trigger back through the following steps.

1) Place the muzzle, pointing down, on a workbench and give the back of the upper receiver a sharp slap to seat it all the way rearward.
2) Then give a sharp slap to the bottom of the foregrip.
3) Then pull it up and forward to remove.

If it still hangs up, you will need to remove the sear and selector while it is still on the gun. To do this, rotate the selector to a vertical position with the pointer pointing up. Use a punch on the opposite side to drive the selector out. Once it clears the sear, the selector will pull free easily. The upper receiver should be able to be pulled off the lower receiver. When the upper is removed, watch out for the loose parts that will fall out. The sear, sear spring, trip and retainer spring will be loose.

The most likely problem will be a malformed selector/sear retaining spring. When installed, the "L" shaped end towards the front of the lower should sit 3/16" below the top edge of the lower receiver. Also, inspect the lower receiver to see if there is any weld build up around the retaining pin reinforcement. Excessive weld could be binding the upper.

+Should I convert my M-11 to accept STEN magazines?

The Sten magazines are inexpensive, but due to the many manufacturers they vary in dimensions.

The Sten conversion is compatible with our Uppers, but you may have to sort out which Sten mags work best or adjust the feedlips to get reliability.

Sten conversions were popular when the magazine ban was in effect.

The conversion increases the size of the grip, which is already blocky and uncomfortable.

I recommend leaving the magwell alone and purchasing the steel magazine

M-11A1 Related Questions:
+What ammunition is recommended for the MAX-11A1/380 mk2?

You can use a variety of ammunition but we tend to use Magtech 95 gr. FMJ. We have found this ammo to provide reliable feeding and the most consistent results for reliability.

+My M-11/380 is a Powder Springs or RPB instead of a SWD, can I still use your parts?

The Powder Springs M-11A1 will work with some of the parts we make. The magazine well on the Powder Springs version was made smaller and will only accommodate the .380 mags. Since the magwell is smaller, you will need to make sure that you select the 2 pc. Molded Grip that specifically states that it is for the M-11/380 Small Magwell. You will still be able to use the MAX-31A mk2 with this smaller magwell since the magwell is moved forward to use Drum Magazines. You can also use the MAX-11A1/380 mk2 Upper Receiver.

+What adapter do I need in order to put my M-11A1 Suppressor on my MAX-11A1 or MAX-31A mk2 ?

If you want to put a Suppressor that came with your M-11A1 (assuming it has an original barrel) on to the MAX-11A1 or MAX-31A mk2, then you need an adapter to go from 1/2-28 to 5/8-11. Since you will be using a suppressor designed for .380 ACP with 9mm ammo, you need to cosult with the suppressor manufacturer to insure it is safe to do so.

M-10 Related Questions:
+When will you come out with the MAX-10/22 and M-10/22?

We do not make a .22 kit for the M-10 or MAX-10. We regularly refer inquiries for M-10 .22 kits to Sam at Practical Solutions.

+Can I put one of your Stocks on my Jersey Arms M-10 ?

None of our M-10 Stocks work with a Jersey Arms M-10. Our Stocks were designed for SWD (Cobray), RPB, Powder Springs or Texas Leatherwood M-10's. Sorry.

+Where can I buy M-10 Magazines?

For M-10/9 Double Feed Magazines:

We sell RPB M-10/9 DF magazines HERE

For M-10/45 Magazines:

Jerry Prasser at Recon Ordnance. His website is , but he prefers to help customers over the phone, (920) 922-1515. His price is $45.00 for a 32rd magazine.

Unmodified Greasegun magazines can be purchased from or

+Can I use your MAX-10/9 mk2 Upper if my Lower has been modified to accept UZI magazines?

Yes, but you will need to send your Double Feed bolt assembly to Sam at Practical Solutions to be modified. For pricing, please contact Sam at Practical Solutions.

+Can I use one of your Uppers to convert my M-10/45 to 9mm?

Yes. You will need to decide whether you would like use single feed or double feed magazines.

Here's what you need to convert it:

Double Feed:

The MAX-10/9 mk2 Double Feed Upper Receiver.

Drop in Magwell adapter from RPB Industries. It's not listed on his site, so call him at (404) 326-6798.

M-10/9 Double Feed Metal Magazines from RPB Industuries.


Single Feed:

The MAX-10/9 mk2 Single Feed Upper Receiver.

Drop in Magwell adapter from our website.

M-10/9 Single Feed Magazines.
For magazines, you would use steel single feed M-10/9 magazines. Jerry Prasser at Recon Ordnance sells them. His website is , but he prefers to help customers over the phone, (920) 922-1515. You can also use Single Feed magazines that are plastic but we do not recommend them. This is one reason many people prefer the double feed option. The plastic magazines are either the original Zytel or Pro Mags. While they are very inexpensive, the feedlips are known to wear down. We do sell Feedlip Kits to repair them for when that happens.

In addition, you would need one of our M-10/45 to M-10/9 Single Feed Magazine Catches.

+I have a MAX-10/45 mk2. Can I buy the 9mm Barrel and 9mm Bolt Assembly to convert it to 9mm?

Yes, but you will also need a magwell adapter and 9mm magazines. We sell these on our website HERE.

+How can I tell if I have a Double Feed or Single Feed Bolt?

Please refer to the pictures below:

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.22 Conversion Kit Related Questions:
+Will your .22 kit work with a STEN converted Lower?

Yes, we offer sten magazines for the .22 kit. Just let us know you will be using it in a sten modified gun when placing your order.

+How do I use a Suppressor with my .22 kit?

You can use a 9mm suppressor with your .22 kit without a problem. If you plan on using a .22 suppressor with your .22 kit, you will want to thread your .22 barrel to accept the suppressor. When ordering your .22 kit, please let us know that you will need a .22 barrel long enough to be threaded. We can provide a longer barrel if necessary. We do not offer threading services but does and they are down the street from us. They can be contacted at . is also familiar with our kits and offers threading services.

+My .22 magazines are not locking in. How can I fix it?

The magazines have a mag' catch notch molded into the back. It is molded in a shallow "V" shape. The tip of the "V" can be carefully sanded or filed flat and this will allow the magazine to lock in more positively. Try it on one magazine and see if that solves the problem. Only remove a little material and test to see if it catches. Repeat until you get a positive lock.

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General Questions:
+What options do I have for Barrel Threads? How do I know which thread I need on my barrel?

Please refer to the Chart below:

+Where can I buy Magazines?

We highly recommend the use of steel magazines over plastic. Plastic magazines are cheaper, but they do not perform as well since feedlips get worn down and you will either need to replace the magazine or repair them with one of our steel feedlip kits.

SWD M-11/9 (MAX-11, MAX-11 mk2, MAX-11k) and SWD M-11A1 (MAX-11A1/9, MAX-11A1/380, MAX-11A1/9 mk2, MAX-11A1/380 mk2) : We carry Shockwave Technologies magazines. We have found these to be of the best quality and reliability. We stock 30 round and 50 round M-11/9 magazines HERE. If we're out of stock, you can also purchase them directly from Shockwave Technologies. You can also use plastic Zytel or Pro Mag Magazines. These will NOT WORK in the RPB M-11/380 lowers.

RPB M-11/380 (MAX-11A1/380 mk2): You can purchase Metal Magazines from our websiteHERE.

MAX-31, MAX-31 mk2, MAX-31A, MAX-31A mk2, MAX-31k : You can purchase drum magazines from Center Fire Systems or Numrich Gun Parts. Coffin magazines can be purchase from Folke Myrvang on classifieds.

M-11/22, MAX-11/22 or MAX-11/22 mk2: Our .22 kits use proprietary magazines. They can be purchased on our website HERE for $40.00 each. They are 40 round magazines. Though they are plastic, they have been designed in a way that the feedlips do not get worn down.

M-10/9, MAX-10/9, MAX-10/9 mk2: Double Feed Magazines can be purchased on our website.

Single Feed Magazines: You can purchase steel single feed M-10/9 magazines from Jerry Prasser at Recon Ordnance. His website is , but he prefers to help customers over the phone, (920) 922-1515. You can also use Single Feed magazines that are plastic but we do not recommend them. The plastic magazines are either the original Zytel or Pro Mags. While they are very inexpensive, the feedlips are known to wear down. We do sell Feedlip Kits to repair them for when that happens.

M-10/45, MAX-10/45, MAX-10/45 mk2: Unmodified Greasegun magazines can be purchased from or They are inexpensive magazines that can be used with the addition of one of our M-10 Dual Magazine Catches. Regular M-10/45 magazines can be purchased from RPB Industries or Recon Ordnance.

+Where can I buy a Machine Gun?

Check the places listed below. Availability changes all the time since Machine Guns are no longer legal to manufacture for citizens. You may have to "hunt" for a while to find the one you are looking for.

1. Classified Ads

2. Ruben Mendiola -

3. Trading Post on




7. Dennis Todd 610-543-7300

+Are speed buffers (MAC JACKS) OK to use?

The speed buffers shorten the reciprocating of the bolt (A.K.A. Short-Stroking) thus increasing the speed. They are ok to use. For the M-11, MAX-11, MAX-11k, MAX-11 mk2, MAX-31, MAX-31 mk2, MAX-31k and MAX-31A mk2, we recommend using one of our VBS (Variable Buffer Spacers) to increase the rate of fire. For more information about the rates of fire that can be achieved with the VBS, please see the information listed under the page for the Upper you want to use with the VBS.

+How many VBS can I fit in my Upper and what will the Rate of Fire be?

The number of VBS you can fit in an Upper along with the approximate rates of fire will be listed under the VBS section on the page for that specific Upper.

The Legacy Uppers hold the same amount of VBS as listed for the mk2 Uppers but the rates of fire will be slower than listed for the mk2 Uppers

+Can I use +P, +P+, Flat Nosed, Truncated Cone, Hollow Point, Steel cased, Aluminum cased, Subsonic, Remanufactured or Reloaded Ammunition?

None of this ammunition is recommended for use with our Upper Receivers. They can cause problems ranging from feed jams to squib rounds that will ruin your barrel. Reloaded ammunition, Remanufactured ammunition, and Aluminum Cased ammunition will void the warranty.

The recommended ammunition for all of our Upper Receivers is a Full Metal Jacket Round Nose bullet.

The recommended ammunition for the .22 kits is Remington Golden Bullet Plated Hollow Point, CCI Mini Mags or CCI AR Tactical Copper Plated Round Nose.

+Do you have instructions on how to replace the fire control parts? has a wonderful color coded guide on how to remove and install the entire fire control group HERE.

+What Suppressor do you recommend?

For the M-11/9, we like the Gemtech MK-9K

For the M-10/45, we do not have a recommendation but many customers have told us they are happy with the Advanced Armament Corp. Ti-RANT .45

Other options to look into are the Gemtech Viper ,which was made specifically for the MAC, and Bowers Vers 45 and Vers 9S which were also designed specifically for the MAC.

+Can I send my gun to you to get it "fitted"?

We do not accept customers' firearms. Our parts are designed to be added to your gun without needing a gunsmith. If you are running into fitment issues, please e-mail or call and we can troubleshoot any issues. If the fitment problems are related to your gun, we can recommend a gunsmith that specializes in MACs.

+Can I use the Left Folding Stock or K Folding Stock with the original OEM Upper?

Yes, but you will not be able to use the iron sights. The folding stocks sit higher than the standard collapsible stock. We also make the "OEM" Folding Stock for use with the original Uppers. If you have a scope rail on top of your OEM upper, any of our stocks will work with it.

+Do you offer any discounts?

Sorry, we do not offer any discounts.

+Do you offer dealer pricing?

Yes, we offer dealer pricing on select products. Please e-mail a copy of your FFL to for a list of products that we offer dealer pricing on.

+How do you pronounce "Lage"?

Lage is Richard Lage's last name. Our family pronounces it so it rhymes with cage, page, etc. In German, it would be pronounced La-guh.

Troubleshooting Questions:
+Why doesn't my gun shoot Semi-auto when I move the selector to "Semi"?

The issue you are experiencing with the selector may actually be caused by the previous owner uninstalling the trip or installing it incorrectly. If you simply take out the trip, then your gun will run full-auto all the time whether you have the selector on semi or full. You can purchase a new Trip HERE (towards the middle of the page) . Also, check if your Sear has been modified.

-The MAX-11, MAX-11k, MAX-11A1, and MAX-10, MAX-31, MAX-31k and MAX-31A Uppers will work in both Full-Auto and Semi-Auto.

-The .22 conversion kits do not work in Semi-Auto.

+I can't insert my magazines when my Collapsible Stock is collapsed, why is that?

If you are using metal Recon Ordnance Magazines, then you have to have the Collapsible Stock extended when inserting the mag.

+I'm having extraction issues, should I get a new extractor?

Place an empty shell in the chamber and close the bolt on it. With an empty magazine in the magwell, slowly pull the bolt back and see if the shell comes free prior to hitting the ejector rod. Sometime the extractor hook rests on the outside edge of the rim instead of gripping around it. The shell does not need the extractor to clear the chamber, but it will not "flick" clear of the gun if the extractor does not hook around the rim. Try it a couple times to verify it is or is not working correctly.
Extraction issues can also be caused by ammo or mags rather than the extractor itself. Try different combinations of magazines and ammunition. If you are still having issues, then you may need a new extractor.

+My MAC isn't working properly, where can I find a gunsmith that specializes in MACs?

Practical Solutions,

C & S Metall-Werkes,

+My Upper Receiver is not fitting on my Lower Receiver. What should I do?

Please check for weld build up inside the back rear top of the lower receiver. There may be marks from it digging in to the rear upper receiver slots. If there is excess weld, it can be carefully removed with a jewelers file. Also, check for any other rub marks on the bottom of the upper receiver to see where the interference may be. If you have an aftermarket stock installed, make sure that the stock latch is not sitting up high enough to interfere with the upper sliding in. Finally, if you lower has a 83- or 84- serial number, it may have an odd stock carrier welded in place. Check for rub marks on the bottom rear of the upper receiver. Also, make sure the gun is unloaded and the safety is off when putting the Upper on.

+My gun had a runaway. What should I do?

Runaways can be caused by a couple of things:

1) Weak ammo can short stroke the bolt, not allowing the bolt to catch the sear.

2) Check the sear notch on the bolt to see if it is worn or rounded. On the MAX-31, MAX-31 mk2, MAX-31A, MAX-31A mk2 and MAX-31k It is located by the bolt face, not at the front like the OEM M-11/9 bolt.

3) Check for a bent ejector rod or recoil rod. If the bolt has been dropped, the rods can get bent causing friction. To check for straightness, remove the rods and roll them on a flat surface. Look for any wobbling. Also, look for any shiny, worn spots on one side. The rods can be straightened and re-used.

4) Clean the upper and look for any obstructions that may be rubbing on the bolt.

+I'm experiencing jamming with my MAX-11 or MAX-11 mk2 Upper. What can I do to fix it?

The answer to this question is dependent on the type of jam you are experiencing. Please select which type of jam you are experiencing.

- Bullet tip is hitting the barrel (Feed Jam) This can be caused by hollow point or flat point ammunition. We recommend using full metal jacket, round nose ammunition.

You can adjust the feedramp up to eliminate the bullet tips jamming on the barrel edge. To do this, remove the fire control parts and place a couple of layers of tape on the feedramp to protect it. Place an adjustable wrench on the feedramp and close the jaws down on it. Pry up a little and then check the height by placing the upper on the lower without the bolt assembly installed. Place your "pinky" finger in the ejection port and slide it up the feedramp and into the barrel chamber. You should feel a smooth transition. If it is not, use the adjustable wrench again to move it higher.

- Stovepipe Jam or Extraction Jam

This type of jam is usually caused by weak ammunition or bad magazines. Try using Federal WM51991 115 gr. or S&B 115 gr. ammo. Make sure your magazines are not over-inserted by tugging thme back down after inserting and amke sure the bullets are sitting properly in the feedlips. They should be slanted upwards at approximately a 7 degree angle. Also, make sure your magazines are clean.

If these tips didn't help, please call or e-mail us so we can help you troubleshoot the issue.

+I installed your Sear and now my gun only burst fires in Full-Auto. What should I do?

Our Sear is manufactured with a tighter selector pin hole tolerance than the OEM one. Your particular gun may have needed this extra play to work correctly.

The gun burst firing in the full auto mode is usually caused by the trip rubbing on the bottom of the bolt, when the gun is set to full-auto.

If you remove the trip and fire the gun, it should shoot full auto without interruption.

You should be able to verify the trip is rubbing by manually cycling an empty gun. Set the gun to "Semi" and hold the trigger back hard while you cycle the bolt back and forth. You will feel the trigger get pushed forward a little or light resistance on the bolt from the trip. The solution is to remove a little material from the front top of the trip, where it contacts the bottom of the bolt. File or grind off about .020" and check to see if the trip is rubbing when in semi-auto or test fire it to see if it is functioning correctly.

+My gun failed to eject. What should I do?

Please check the following:

1) Make sure the extractor is not missing. If not, check the extractor hook to see if it is worn.

2) Make sure the extractor spring is not missing. If not, check the extractor spring tension to make sure it has not weakened.

3) Disassemble the extractor from the bolt and clean out any built up carbon fouling underneath the extractor.

4) Check the recoil rod and ejector rod and make sure they are not bent. Look for any shiny spots on the rods to see if they are rubbing. Remove the rods and roll them on a flat surface to see if they wobble. The rods can be straightened and re-used.

5) Check the bolt face to make sure it is not damaged. An out of battery can crack the lower lip of the bolt face.

6) Check the barrel chamber to make sure it has not stretched. Insert an unfired bullet backwards into the chamber. It should only be able to inserted about half way. If it can seat on the ridge for the case mouth, the chamber is stretched.

+My .22 Conversion Kit is not feeding properly. What should I do?

Please make sure that you are not getting rim lock when loading the magazines. Rim lock is when the rim of the round being loaded into the magazine slips behind the rim of the round underneath. This causes the bullet to be slowed down during feeding, because it has to overcome the rim underneath. It basically acts as a speed bump.

For ammo, I recommend high velocity plated 40 grain .22 long rifle. Specifically, Remington Golden Bullet or CCI Mini Mag.

+My .22 Conversion Kit with a side cocking Upper is jamming. What should I do?

With a side cocking upper, it is important to hold the cocking knob forward when firing. Otherwise, the cocking knob can move rearward and the .22 bolt will crash into it on the forward stroke. Besides peening the bolt, this can rob energy from the bolt and cause misfires or feed jams.

It is fairly easy to shoot with your left thumb resting on the cocking knob to hold the cocking knob forward. As long as the bolt freely moves within the upper, there is nothing to worry about. If a burr is raising, it can be filed down.