Description
complete UPPER RECEIVER, HANDGUARD, BARREL NUT , GAS SYSTEM, BARREL, AND BIRD CAGE MUZZLE BRAKE LENGTH: 16″
PROFILE: 5.56 NATO M4 , GOVERNMENT
GAS SYSTEM: CARBINE GAS
TWIST RATE: 1:7 / 1:8
GAS BLOCK: .750″
MATERIAL: 4150 CrMoV
MUZZLE: 1/2-28 THREAD
FINISH: NITRIDE
Legal Restriction:
Durkin Tactical is currently using a third party vendor to verify the legality of our parts. If you place an order that is not legal in your state, city, town, county, etc., your order will be cancelled, charged a 20% restocking fee and the remainder refunded. Please make sure that your order is legal in the state, city, town, county, etc. it will be shipping to.







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