The MAX-31A mk2 upper receiver is specifically designed to allow use of inexpensive, high capacity, 72 round Suomi M31 drum magazines.
The longer receiver converts the M-11A1 into a carbine sized submachinegun and provides greater control and handling. The 72 round drum magazine allows you to shoot longer between magazine changes, enabling you to save precious
time during matches.
Features include a 16" long accessory rail on top and hard mount points for additional M1913 rails on right and left sides of front handgrip.
Bottom rail is integral. Contained within the upper receiver is a heavy weight bolt assembly with a longer length of travel than the stock
M-11A1 upper recevier . This reduces the rate of fire (ROF) from 1,800 RPM with .380 ACP ammo down to around 700 RPM with 9mm ammo. Due to
the reduced ROF and longer bolt travel, muzzle rise is reduced, the gun feels much smoother in operation and easily stays on target.
The MAX-31A mk2 attaches to the stock M-11A1 lower receiver without any modification to the lower receiver and uses your existing retaining
pin. 50 round M31 "Coffin" magazines can also be used with the MAX-31A mk2, but the 36 round double feed magazines are not compatible.
The picture above shows a MAX-31A mk2 with additional Lage Mfg. accessories that are not included with the MAX-31A mk2 upper receiver.
Registered lower receiver is not included.