Lage Manufacturing

MAX-11A1/9 mk2 Upper Receiver

MAX-11A1/9 mk2 Upper Receiver #519

$695.00

Side cocking upper receiver for the M-11A1 .380 ACP SMG. This upper receiver converts the M-11A1 from .380 ACP to 9mm. Must be used with a lower receiver with a large mag' well, such as the SWD M-11A1. RPB guns typically have a small mag' well. Reduces rate of fire from 1,800 RPM in .380 ACP to around 1,000 RPM in 9mm. Features a full length accessory rail on the top and integrated foregrip with accessory rail on bottom. Mounting points on sides for additional accessory rails. Side cocking, reciprocating charging handle on left side. Designed for use with removeable AR-15/M-16/M-4 sights (not included), or can be used with just a scope installed. Comes complete with upper receiver, bolt assembly, cocking knob, barrel and manual. Drop-in assembly requires no modification to your lower receiver.

Backordered- Add to waiting list

Barrel Upgrades-

The MAX-11A1/9 mk2 comes standard with a 1/2-28 barrel thread and a flash hider installed. The optional 3/4-10 thread is the original OEM thread of the M-11/9 SMG, for use with the standard M-11/9 suppressor. Select one of these options for a different barrel thread. Only select one.

3/4-10 Barrel Uprade +$20.00

3-lug Barrel Upgrade +$104.00


Resources

Manual

  • Description:
    The MAX-11A1/9 mk2 is designed to be used with the SWD M-11A1 .380 ACP SMG. Due to the smaller .380 ACP magwell of the RPB and MAC .380 SMGs, they cannot accept a 9mm magazine for this conversion.

    Features include a full length M1913 compatible rail on top and bottom. Hard mount points for additional M1913 rails on right and left sides. Contained within the upper receiver is a heavy weight bolt assembly that telescopes over the barrel. The bolt weight is securely attached to the bolt assembly with two hardened cap screws- no welds to crack or break. This reduces the rate of fire (ROF) from 1,800 RPM in .380 ACP, down to around 1,000 RPM in 9mm. Due to the reduced ROF, muzzle rise is reduced and multiple rounds stay on target. Rate of fire is approximate and varies depending on ammunition used. Side cocking, reciprocating charging handle on left side. Designed for use with removeable AR-15/M-16/M-4 sights (not included), or can be used with just a scope installed. Comes complete with upper receiver, bolt assembly, cocking knob, barrel and manual. The MAX-11A1/9 attaches to the stock M-11A1 lower receiver without any modification to the lower receiver.

    The picture above shows a MAX-11A1/9 with additional Lage Mfg. accessories that are not included with the upper receiver. Accessories are available below. Registered lower receiver and magazine is not included.

  • Features:

    Upper Receiver

    1) Top Rail 10-1/2" 3) Side Accessory Rail Mounting Points 5) 8-3/8 inch barrel length, removeable (threaded 1/2-28)
    2) Bottom Rail 3"4) Cocking Handle (reciprocating)6) Flash Hider

    Image


    • Designed for use with a SWD M-11A1 .380 ACP submachinegun lower receiver.
    • Requires no modification of the lower receiver to install upper.
    • Allows use of inexpensive 9mm ammo.
    • 950 RPM standard rate of fire.
    • Side cocking- Cocking knob located on left side. Cocking knob reciprocates with bolt.
    • 8-3/8" barrel threaded 1/2-28 at muzzle with "Birdcage" flash suppressor.
    • Barrel is made from chrome moly steel and finished in black oxide, rifle twist is 1:16.
    • 10-1/2" long Picatinny rail along top for mounting a scope or removeable iron sights.
    • 3" long Picatinny compatible rail along bottom for grip, laser, light or other accessory.
    • Handstop in front of bottom rail to provide positive indexing and a repeatable grip.
    • Mounting points on left and right side of foregrip for mounting additional rails.
    • Steel shell deflector.
    • Upper receiver is manufactured from 6061 Aluminum and finished in hard coat black anodize.
    • Weighs 3.17 pounds.
  • Specifications:
    • Overall dimensions of MAX-11A1/9 mk2 upper receiver:
      • Length: 13.25"
      • Width: 1.45" to handguard, 2.30" to cocking knob.
      • Height: 3.42"
      • Weight: 3.17 pounds.

    • Overal dimensions of the MAX-11A1/9 mk2 when assembled to an M-11A1 lower receiver with a 8-1/2" stock:
      • Overall length- 22-1/4"
      • Width: 1.45" to handguard, 2.30" to cocking knob.
      • Height: 6.13"
      • Weight unloaded is 5.20 pounds.
      • Weight with a loaded 32 round magazine is 6.36 pounds.

    • Rate of fire: approximately 1,000 RPM

    Use of steel cased, reloaded/re-manufactured ammo will void the warranty.