Armalite AR 10 (B) Upper Receiver Assembly
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$319.00
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Armalite AR 10 (B) Upper Receiver Assembly, The Armalite AR-10(R)A4 B-Series flat-top upper receiver is made from forged 7075-T6 aluminum, features a flat-top with MIL-STD 1913 rail and a thread size of 1-7/16x18 UNEF-3A. AR-10(R)A4 complete upper is Armalite's standard flat top upper with the standard port door rod used for all AR-10's that will utilize a 2-piece handguard. If a free float handguard is to be used, the 10002000 AR-10(T)TM complete upper is needed. *Compatible with Armalite AR-10(R) B-Series lowers.