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5.56x45mm NATO
Shop 142 Deals on 5.56x45mm NATO Upper Receivers
Browse 5.56x45mm NATO Upper Receivers for sale at the lowest prices online.
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Daniel Defense M4A1 FSP 14.50" Carbine-Length Upper 5.56x45mm 1:7 Quad Rail with BCG and CH, Flat Dark Earth - Tactical Precision - 2300409376
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Daniel Defense
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Spike's Tactical Generation 2, Billet, Upper, 223 Remington, 556NATO, Black, Mil-Spec Barrel Nut
$283.99
$208.99
Spikes Tactical
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Sons of Liberty Gun Works M4-L89 5.56x45mm 11.50"
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Sons Of Liberty Gun Works
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FightLite MCR Dual-Feed 16.25" Upper 5.56x45mm 1:7 Mil-Std 1913 Picatinny Rail, Black
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Fightlite
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Luth-AR 24" Bull Barrel Complete Upper Assembly For 223 Rem/556NATO Keymod, Black - FTBL-B24
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Luth-Ar
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Sons of Liberty Gun Works Veil Solutions .223 Remington/5.56x45mm 13.70", Tan
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Sons Of Liberty Gun Works
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Colt EPR 5.56 M-LOK 16" AR-15 Upper, Black - LE6920EPR-CK
$1,229.95
$881.99
Colt
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Luth-AR 16" Lightweight Barrel Complete Upper Receiver For 223 Rem/556NATO, Black - BAA3-L16
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Luth-Ar
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Sons of Liberty Gun Works .223 Remington Upper with 13.7" Barrel, Black - EXO3UPPER13.7556
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Sons Of Liberty Gun Works
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Noveske Commando Barrel Stainless 5.56 NATO / .223 Rem 11.5 Barrel for AR-15
$458.99
$342.00
Noveske
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Battle Arms WORKHORSE AR-15 Upper Receiver, 16" Barrel, No BCG or Charging Handle
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Battle Arms Development
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FightLite Raptor Dual Feed Upper 16.25" Fits All MIL-SPEC AR-15, M16, and M4 Lowers, 100 Links Included - RPTR-001
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Fightlite
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FightLite MCR Dual-Feed 16.25" Upper 5.56x45mm 1:7 M-LOK Picatinny Rail, Black
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Fightlite
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FightLite MCR Dual-Feed 16.25" Upper 5.56x45mm 1:7 Mil-Std 1913 Picatinny Rail, Black
MAP
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MAP
Fightlite
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Sons of Liberty Gun Works L89 V2 5.56 11.50" Upper 5.56x45mm M-LOK Rail, Black
MAP
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Sons Of Liberty Gun Works
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FN Barrel 556NATO 14.7" Black Hammer Forged Carbine AR Rifles
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Fnh
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Sons of Liberty Gun Works .223 Remington Upper with 16" Barrel, Black - PATROLSLUPPER16556
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Sons Of Liberty Gun Works
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Ballistic Advantage Performance Series Barrel 556NATO 12.3" Black Gas Block
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Ballistic Advantage
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Aero Precision M4E1-T Upper 5.56 / .223 Rem 14.5 Barrel w/ ATLAS R-ONE Handguard
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Aero Precision
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Geissele Automatics Super Duty Mod 1 14.5" Upper 5.56x45mm 1:7 M-LOK Rail Mid-Length with BCG and CH, Desert Dirt - 08547S
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Geissele
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Geissele Automatics Super Duty Mod 1 13.90" Upper 5.56x45mm 1:7 M-LOK Rail with BCG and CH, Desert Dirt - 08-546S
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Geissele
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Aero Precision AR-15 16" MOE Upper 5.56x45mm 1:7 MOE M-LOK Rail SL Mid-Length, Flat Dark Earth
MAP
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Aero Precision
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Rosco Manufacturing Bloodline Barrel 556NATO 14.5" Black 1:7 BL-145-M4-556-7-C
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Rosco Manufacturing
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Battle Arms Development WORKHORSE Upper .223-Remington 5.56-NATO 10.5 Barrel
MAP
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Battle Arms Development
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