MAX-11S mk2 Pistol Upper Receiver

These upper receivers are designed for use with M-11/9, 9mm semi-auto pistols. M-11/9 pistols were originally designed and manufactured by S.W.D. but have also been manufactured by Leinad, and more recently by Master Piece Arms (MPA). The S.W.D. guns are stamped with a "COBRAY" logo and are commonly referred to as being manufactured by Cobray. All of these manufacturers have also made carbine variants. Master Piece Arms makes many models of the M-11/9 including a shortened version (930 series). These upper receivers will only fit the full size M-11/9. They are only offered in 9mm caliber. Our Uppers will NOT work on the most recent MPA lowers that have a curved back or a glock magwell. The MAX-11S upper receiver was originally designed for the M-11/9 semi-auto pistol. It is also compatible with a full auto bolt and can be used with a registered receiver M-11/9 SMG. Features include a 12-1/2" long accessory rail on top and 3" long rail on the bottom. Hard mount points for additional rails on right and left side. The MAX-11S attaches to the stock M-11/9 lower receiver without any modification to the lower receiver and uses your existing retaining pin. Easy to convert- Remove pistol upper from lower receiver. Remove bolt assembly from your upper and slide it into MAX-11S upper receiver. Install upper into lower receiver and replace retaining pin. The picture above shows a MAX-11S with additional Lage Mfg. accessories that are not included with the MAX-11S upper receiver. Lower receiver is not included.

Upper Receiver

1) Top Rail 12-1/2"	2) Bottom Rail 3"	3) 8-3/8" 9mm Barrel	4) Flash Hider
5) Side Accessory Rail Mounting Points	6) Shell Deflector	7) Side Cocking Handle (non-reciprocating)

Drawing shown above with 16" barrel is for reference. MAX-11S mk2 has an 8-3/8" barrel.

• Designed for use with a M-11/9 semi-auto pistol.
• Compatible with full auto bolts for use with an M-11/9 SMG.
• Requires no modification of the lower receiver to install upper.
• Uses existing bolt assembly from your M-11/9 pistol.
• 8-3/8" barrel threaded 1/2-28 at muzzle with "Birdcage" flash suppressor. Mock Suppressor available as an upgrade.
• 12-1/2" long accessory rail along top for mounting a scope or removable sights.
• 3" long accessory 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.
• Side cocking, non-reciprocating charging handle on left side.
• Steel shell deflector.
• Upper receiver is manufactured from 6061 Aluminum and finished in hard coat black anodize.
• Barrel is made from chrome moly steel and finished in black oxide, rifle twist is 1:16.

• Overall dimensions of MAX-11S pistol upper receiver:
  • Length: 14-1/8"
  • Width: 1-3/8" to handguard, 2" to cocking knob.
  • Height: 2-1/2" (2-3/8" to bottom of handstop)
  • Weight: 1 pounds 14 ounces.

• Overall dimensions of the MAX-11S when assembled to an M-11/9 semi-auto lower receiver with a 8-1/2" stock:
  • Overall length- 23-1/2"
  • Width: 1-3/8" to handguard, 2" to cocking knob.
  • Height: 6-1/4"
  • Weight unloaded is 4 pounds, 13 ounces.
  • Weight with a loaded 30 round magazine is 5 pounds, 14 ounces.

  Please note, if you have any functional problems with your semi-auto M-11/9, please have it repaired by a qualified Gunsmith prior to installing the MAX-11S upper receiver. Installation of the MAX-11S will not resolve any pre-existing problems with your gun.

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