The Rock River Arms MID A4 - 16 Inch - CHROME LINED - Lightweight - Basic Upper features a Rock River Arms 16 Inch CMV, chrome-lined, lightweight profile barrel chambered in 5.56 NATO with a 1:9 twist, mid-length gas system, front sight tower with bayonet lug, and a 1/2-28 threaded muzzle.  Built on a Rock River Arms forged A4 flattop receiver with midlength plastic handguards, sling swivel, and an A2 flash hider.

Complete with RRA AR-15 bolt carrier assembly and forged charging handle. 

The Rock River Arms R3 Competition Upper features a Rock River Arms 18 inch stainless steel, fluted, cryogenically treated barrel chambered in .223 Wylde, with a 1:8 twist, mid-length gas system, and a 1/2-28 threaded muzzle.  Built on an RRA forged A4 flat top receiver with a low profile gas block, RRA lightweight M-LOK compatible 17 inch free float handguard, and an RRA tuned and ported muzzle brake.

The Rock River Arms - LAR-300 - CAR A4 Basic Upper features a 16 Inch CMV, HBAR barrel chambered in .300 Blackout with a 1:8 twist, carbine length gas system, A2 front sight base with sling swivel and bayonet lug and a 5/8-24 threaded muzzle.  Built on a Rock River Arms forged A4 flattop receiver with carbine length plastic handguards and an A2 flash hider.

Complete with RRA AR-15 bolt carrier group and forged charging handle.

FACTORY BUILT BY ROCK RIVER ARMS INC.

Rock River Arms 6.8 SPC Coyote Carbine Upper Half SPC0592

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