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.223/5.56 Upper Assemblies

Rock River Arms
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  • 9MM0362X Rock River Arms 10.5" Chrome Moly A4 Pistol Upper Half 9mm
    9MM0362X Rock River Arms 10.5" Chrome Moly A4 Pistol Upper Half 9mm CALIBER 9mm Luger Chamber UPPER RECEIVER Forged A4 BARREL Chrome Moly 10.5", 1:10 Twist MUZZLE DEVICE A2 Flash Hider / 1/2x36 TPI HANDGUARD...
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  • AR036201 Rock River Arms 10.5 inch Chrome Moly A4 Pistol Upper Half 5.56/.223
    CALIBER .223/5.56 UPPER 10.5 Inch Chrome Moly A4 Pistol Upper Half BOLT CARRIER GROUP Chromed Bolt Carrier Group HANDGUARD RRA Quad Rail Free Float CHARGING HANDLE Badger Tactical Charging Handle GAS BLOCK Gas Block Sight...
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  • AR036202 Rock River Arms 10.5 inch Chrome Moly A4 Pistol Upper Half 5.56/.223
    CALIBER .223/5.56 UPPER 10.5 Inch Chrome Moly A4 Pistol Upper Half BOLT CARRIER GROUP Chromed Bolt Carrier Group HANDGUARD Standard R4 CHARGING HANDLE Standard Charging Handle GAS BLOCK Gas Block Sight Base...
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  • AR036301 Rock River Arms 7" Chrome Moly A4 Pistol Quad-Rail Upper Half 5.56/.223
    CALIBER 5.56mm NATO Chamber for 5.56 & .223 UPPER RECEIVER Forged A4 BOLT CARRIER GROUP Chromed Bolt Carrier Group BARREL Chrome Moly 7", 1:9 Twist MUZZLE DEVICE A2 Flash Hider / 1/2x28 TPI HANDGUARD RRA Quad Rail Free...
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  • This is the shortest upper you can get from RRA. These uppers are custom made for us by Rock River Arms master gunsmiths. The barrel is 14" in length with a perminently affixed extended A2 flash hider for a legal total...
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  • AR0450X Rock River Arms 20 inch Standard A4 Upper Half 5.56/.223
    20 inch 1:8 Heavy Match Stainless Steel Barrel, A4 Upper Half, 223 Wylde Chamber for 5.56mm & .223 Cal., complete with Chrome Bolt Carrier Group, charging handle, RRA Aluminum Free Float Handguard, Gas Block and A2 Flash...
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  • AR0500X Rock River Arms 16 inch Bead Blasted Bull Barrel A4 Varmint Upper Half 5.56/.223
    16 inch 1:8 Bead Blasted Bull Barrel A4 Varmint Upper Half, .223/5.56, complete with bolt, charging handle, Hogue Free Float Handguard and Gas Block Sight Base.
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  • AR0525X Rock River Arms 18 inch Bull Barrel A4 Varmint Upper Half 5.56/.223
    18 inch 1:8 Bull Barrel A4 Varmint Upper Half, .223/5.56, complete with bolt, charging handle, Aluminum Free Float Handguard and Gas Block Sight Base.
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  • AR0550X Rock River Arms 20 inch Bead Blasted Stainless Bull Barrel A4 Varmint Upper Half 5.56/.223
    20" inch 1:8 Bead Blasted Stainless Steel Bull Barrel A4 Varmint Upper Half, .223 Wylde Chamber for 5.56mm & .223 Cal., complete with bolt, charging handle, RRA Aluminum Free Float Handguard and Gas Block Sight Base...
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  • AR0550X Rock River Arms 20 inch Stainless Steel Bull Barrel A4 Varmint Upper Half 5.56/.223
    20" inch 1:8 Stainless Steel Bull Barrel A4 Varmint Upper Half, .223 Wylde Chamber for 5.56mm & .223 Cal., complete with bolt, charging handle, RRA Aluminum Free Float Handguard and Gas Block Sight Base...
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  • AR056501 Rock River Arms 20 inch Predator Pursuit A4 Upper Half 5.56/.223
    20" inch 1:8 Heavy Match Stainless Steel Air Gauged Barrel, A4 Upper Half, .223 Wylde Chamber for 5.56mm & .223 Cal., complete with bolt, charging handle, RRA Aluminum Free Float Handguard and Light Varmint Gas Block with...
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  • AR056502 Rock River Arms 20 inch Predator Pursuit A4 Upper Half 5.56/.223
    20" inch 1:8 Heavy Match Stainless Steel Air Gauged Barrel, A4 Upper Half, .223 Wylde Chamber for 5.56mm & .223 Cal., complete with Chromed Bolt Carrier group, charging handle, RRA Aluminum Free Float Handguard and Light...
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  • AR057002 Rock River Arms 16 inch Predator Pursuit A4 Upper Half 5.56/.223 with Chromed Bolt Carrier Group
    16" inch 1:8 Heavy Match Stainless Steel Air Gauged Barrel, A4 Upper Half, .223 Wylde Chamber for 5.56mm & .223 Cal., complete with Chromed Bolt Carrier group, charging handle, RRA Aluminum Free Float Handguard and Light...
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  • AR0585X Rock River Arms 20 inch HBAR A4 Coyote Upper Half 5.56/.223
    AR0585X Rock River Arms 20 inch HBAR 1:9 Barrel A4 Coyote Upper Half 5.56/.223, complete with Chromed bolt carrier group, charging handle, Hogue Overmold Free Float Handguard and Gas Block Sight Base...
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  • AR0590X Rock River Arms 16 inch HBAR A4 Coyote Upper Half 5.56/.223
    MODEL AR0590 CALIBER 223 Wylde Chamber for 5.56mm & .223 Cal. UPPER RECEIVER Forged A4 BOLT CARRIER GROUP Chromed Bolt Carrier Group CHARGING HANDLE Standard Charging Handle HANDGUARD Hogue Overmold Free Float...
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  • AR059501 Rock River Arms 18 inch ATH A4 Upper Half 5.56/.223 with Chromed Bolt Carrier Group
    18" inch 1:8 Heavy Match Stainless Steel Barrel Cryo Treated, A4 Upper Half, 223 Wylde Chamber for 5.56mm & .223 Cal., complete with Chromed Bolt Carrier Group, charging handle, RRA Advanced Half Quad Mid-Length Aluminum...
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  • AR0840x Rock River Arms 16 inch A4 Entry Tactical Upper Half 5.56/.223
    AR0840x Rock River Arms 16 inch A4 Entry Tactical Upper Half 5.56/.223, Dominator 2 rear sight, A2 front sight, bolt carrier group, charging handle, Chrome lined 16" Barrel.
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  • Rock River Arms Tactical CAR A4 14"/16" Upper Half 5.56/.223
    This is the shortest upper you can get from RRA. These uppers are custom made for us by Rock River Arms master gunsmiths. The barrel is 14" in length with a perminently affixed extended A2 flash hider for a legal total...
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