Heckler & Koch Mr556 Upr Rcvr Kit

MR556-A1 Complete Upper Receiver Kit 5.56mm/.223 Remington With 16.5 Inch Barrel Key-Mod Handguard

Includes MR556A1 upper receiver/barrel assembly with 16.5 inch cold-hammer forged barrel key-mod handguard, complete bolt carrier assembly, HK proprietary buffer, recoil spring and is designed to be fully interchangeable with most high quality AR-style firearms. Designed to function with 5.56x45mm ammunition and also cycles most quality .223 Remington ammunition. NOTE: This kit does not work with fixed stock AR-15 rifles.

Barrel Length: 16.5
AR-15 Parts
Caliber: 5.56mm/.223
Tactica: Tactical
Finish: Black
Caliber-Gauge: .223 REM.