There have been alot of questions about which recoil system a customer might want for their MAX-11/15 so here is some more information.
I am not going to go into the details of the IRM (Internal Recoil Mechanism) while we are going through the patent process for the upper. When we have Patent Pending status, I’ll show details, pix and video. We will have Patent Pending before the first unit is sold.
All I can say is that the upper with the IRM assembles on the the lower receiver with no modification to the lower receiver. There is a step you need to do before removing the upper to make it easier to re-install the upper once it is removed. If you forget this step, you will have to do a different step before you re-install the upper again. No screws involved. Not a bunch of complex parts to deal with. You will have to trust me that it is simple and convenient to use.
For the AR Buffer version, you do have to drill a hole in the lower receiver and install the AR Stock Assembly (AR Stock Adapter with AR Stock, Buffer Tube, Buffer and Spring). To change stocks, all you have to do is remove the one screw that secures the AR Stock Assembly to the Lower Receiver and install the stock you prefer.
With the IRM, you can use any stock you want, including an AR stock. You can also use a Folding or Collapsible stock which is something you cannot do with the AR Buffer version.
With the AR Buffer version you have to use a stock system with an AR Buffer Tube, Buffer and Spring. With this system, you can experiment with different buffers and springs to tweak the system, if necessary, for different calibers.
So far, .223 Remington, 5.5x45mm and .300 BLK has been tested in both systems and they both work equally well in both systems. We know that some customers are going to want to try different calibers and the ability to tweak the buffer system may help with that.
In order to maximize production and get MAX-11/15s in customer’s hands as soon as possible, we will be offering only one configuration- 5.56x45mm caliber and a 10-1/2″ barrel.
