schematic of 'exploded' MPA10 Closed Bolt SEMI-AUTO

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Except where otherwise noted, all parts fit Atchisson Patent CLOSED BOLT SEMI-AUTO .45acp Guns, models MPA10 & MPA1, manufactured by MasterPiece Arms ONLY.

THERE IS NO SUCH THING AS "COBRAY" FIREARMS.
THERE IS NO SUCH THING AS A "MAC-10".

READ the MANUFACTURER'S Model, Name and Address, stamped on the Right Side of the Lower Receiver, BEFORE ORDERING PARTS.

These RB MAC MPA10 SEMI-AUTO Hammers and Hammer Pins fit CURRENT PRODUCTION MPA10 & MPA1 Guns ONLY.

Go to the M10/45 SEMI-AUTO PAGE to Order ALL OTHER PARTS for MPA10s & MPA1s.

RB MAC MPA10 SEMI-AUTO Parts DO NOT fit the Military Armament Corporation, Stephensville, TX "Ingram M10A1-S" SEMI-AUTO. The Semi-Auto "Texas MAC" is NOT a "MAC". It was NOT made to Ingram or Atchisson Patent Specs. It was NOT made by the REAL Military Armament Corporation of Powder Springs & Marrietta, Georgia. NO SPARE PART HAVE BEEN AVAILABLE, OR EVER WILL BE AVAILABLE, for the Semi-Auto "Texas MACs".

RB MAC MPA10 Parts DO NOT fit the Vulcan/Velocity Arms VMAC45 Guns.