AR10 (B) Upper Receiver Assembly
MPN: 10002001
UPC: 10002001
The Armalite AR-10®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 1-7/16″x18″ UNEF-3A. AR-10®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 or our free Float M-LOK handguard.
*Compatible with Armalite AR-10® B-Series lowers.
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NOTE: All items are used unless otherwise indicated. Parts kits are NOT functioning firearms; they are parts kits, sold as-is and may include incompatible components. All parts kits sold on this site include everything pictured. They do not include a receiver and we do not sell receivers. No firearms are sold on this site. All ITAR rules in effect. NFA rules may apply to some parts kits.Read more