9mm M4 Upper. Mil-Spec A3 Receiver. 4140 W.A.S.P. Barrel with 1:10 twist and 1/2x36 Muzzle Thread. Ramped 9mm Bolt uses a standard AR-15 or M16 hammer. Do not use with the dedicated 9mm hammer. "F" marked front sight.
9mm M4 Upper. Mil-Spec A3 Receiver. 4140 W.A.S.P. Barrel with 1:10 twist and 1/2x36 Muzzle Thread. Ramped 9mm Bolt uses a standard AR-15 or M16 hammer. Do not use with the dedicated 9mm hammer. "F" marked front sight.
Manufacturer: CMMG
SKU: CMMG90B1AA2
UPC: 852005002332
Unit of Measure: 1
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