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Delton 16 Inch - MIDLENGTH - Basic Upper

$389.00
SKU: 
3693

The Delton 16 Inch - MIDLENGTH - Basic Upper features a 16 Inch CMV, manganese phosphated, M4 ramped, heavy profile barrel, chambered in 5.56 NATO with a 1:9 twist rate, midlength gas system, "F" marked A2 front sight base with sling swivel and bayonet lug and a 1/2-28 threaded muzzle.  Built on a 7075-T6 forged aluminum, annodized, M4 ramped, flattop upper receiver that is coated internally with dry film lube over the annodized surface.  The upper features a milspec bolt carrier that is  machined from 8620 steel, heat treated and plated, chrome-lined on the interior and has a gas key that


Rock River Arms - LAR-300 - CAR A4 Basic Upper - .300 Blackout

$529.00
SKU: 
3710

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 - LAR 300 - CAR A4 Upper - SINGLE RAIL GAS BLOCK - .300 Blackout

$529.00
SKU: 
3711

The Rock River Arms - LAR 300 - CAR A4 Upper - SINGLE RAIL GAS BLOCK features a 16 Inch CMV, HBAR barrel chambered in .300 Blackout with a 1:8 twist, carbine length gas system, and a 5/8-24 threaded muzzle.  Built on a Rock River Arms forged A4 flattop receiver with carbine length plastic handguards, clamp style single rail gas block with sling swivel 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 Lightweight Mountain Rifle Upper

$589.00
SKU: 
3718

The Rock River Arms Lightweight Mountain Rifle Upper features a Rock River Arms 16 inch CMV, lightweight profile barrel, chambered in 5.56 NATO with a 1:9 twist, midlength gas system and 1/2-28 threaded muzzle.  Built on a Rock River Arms forged A4 flat top upper receiver with a Rock River Arms lightweight aluminum mountain rifle handguard, Rock River proprietary, lightweight, low profile gas block, and an A2 flash hider.

Comes complete with Rock River Arms AR-15 bolt carrier group and forged charging handle.



Rock River Arms 20 Inch Coyote RIFLE Upper - TRO DELUXE

$659.00
SKU: 
3795

The Rock River Arms 20 Inch Coyote RIFLE Upper features a Rock River Arms 20 inch CMV, HBAR profile barrel chambered in .223 Wylde with a 1:9 twist, rifle length gas system, and a 1/2-28 threaded muzzle.  Built on a Rock River Arms forged A4 flat top receiver with a single rail gas block, TRO Deluxe Extended free float rail, and a Smith Vortex flash hider.



Rock River Arms Predator Pursuit 20 Inch Upper - TRO DELUXE

$679.00
SKU: 
3796

The Rock River Arms Predator Pursuit 20 Inch upper features a Rock River Arms 20 Inch stainless steel, air guaged, cryo-treated barrel chambered in .223 Wylde with a 1:8 twist, rifle-length gas system, and a target crown muzzle.  Built on a Rock River Arms forged A4 flattop receiver with a single rail gas block and TRO Deluxe Extended free float rail.  ** Comes with 3 short rail sections.



Rock River Arms 16 Inch - MID-LENGTH - Predator Pursuit Upper - TRO DELUXE

$662.00
SKU: 
3797

The Rock River Arms 16 Inch - MID-LENGTH - Predator Pursuit Upper features a Rock River Arms 16 inch heavy match, air guaged, cryo treated stainless steel barrel chambered in .223 Wylde with a 1:8 twist, mid-length gas system and a target crowned muzzle.  Built on a Rock River Arms forged A4 flattop receiver with a TRO Deluxe extended free float rail.  **Comes with 3 short rail sections.



Rock River Arms .458 SOCOM 16 inch Tactical CAR A4 Upper

$769.00
SKU: 
3862

UNTIL FURTHER NOTICE CORBON 300GR HUNTER JSP AMMO SHOULD NOT BE USED IN ANY ROCK RIVER ARMS .458 SOCOM UPPER OR RIFLE.  ROCK RIVER ARMS AND CORBON ARE WORKING TOGETHER TO RESOLVE THE ISSUE, HOWEVER UNTIL THAT RESOLUTION IS ACHIEVED THE AMMO SHOULD NOT BE USED.



Ares Defense - MCR Belt Fed Upper - Semi Auto

$3,495.00
SKU: 
3886

ARES-15 MCR (Mission Configurable Rifle) Semi Auto Upper. Part # MCR-036

ARES Defense is proud to introduce the ARES-15 MCR; our newest platform for professional shooters who demand performance and mission flexibility from their weapons! 

Key features include: reliable mid-length gas-piston operation, adjustable gas block, a (3 second) quick-change barrel, extreme-duty breech bolt, vented high performance barrel extension. 

ARES-15 MCR Details:



Freedom Ordnance - FM-9 9x19NATO Belt Fed AR-15/M-16 Upper Receiver - 16.5" Barrel

$1,795.00
SKU: 
3890

We at PK Firearms are proud to announce we are now carrying the Freedom Ordnance, FM-9 9×19 Nato Belt Fed upper. Over a year in development and 10,000+ rounds in testing have been done by Freedom Ordnance, to bring you the world’s first 9mm belt fed!


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