Final Hours To Save Up To 40% | Shop Now

Final Hours To Save Up To 40% | Shop Now

Black .223 and 5.56 AR-15 Parts

Need Black .223/5.56 AR Parts? AT3 has you covered – with fast & free shipping, hassle-free returns, and friendly customer service.

Showing 1–24 of 370 results

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Sale!

(1)

AT3 Tactical AR-15 Barrel – 16″ – 5.56 NATO – Government Profile – Mid-length

Sale!

Magpul MOE M-LOK Carbine Length Handguard for AR-15 - MAG424 - BLK

(85)

Magpul MOE Drop-In AR-15 Handguard – Carbine Length – M-LOK – MAG424

Sale!

AT3 Tactical AR-15 Barrel – 10.5″ – 5.56 NATO – Government Profile – Carbine Length

Sale!

STNGR Complete AR-15 Upper Receiver with 16 Inch Barrel, BCG and Charging Handle - HWK Handguard, Black

(2)

STNGR 16″ .223 Wylde Complete Assembled Upper Receiver w/ 15″ HWK® Handguard, BCG & CH

RECOMMENDED

Sale!

STNGR Complete AR-15 Upper Receiver with 16 Inch Barrel, BCG and Charging Handle - VLCN Handguard, Black

(1)

STNGR 16″ .223 Wylde Complete Assembled Upper Receiver w/ 15″ VLCN® Handguard, BCG & CH

Sale!

OPEN BOX RETURN - AT3™ Mil Spec Buffer Tube Kit - AR-15

(93)

AT3™ Mil Spec Buffer Tube Kit For AR-15 – 9 Colors Available

Sale!

(11)

Bear Creek Arsenal 5.56/.223 / .300 Blackout / .350 Legend AR-15 Bolt Carrier Group – Nitride

Sale!

ProMag AR-15 Carbine Polymer Quad Rail HandGuard - PM242

(62)

ProMag Polymer Drop-In Quad Rail AR-15 Handguard – Carbine Length – Picatinny

Sale!

FMK Firearms AR1 Extreme AR-15 Stripped Lower Receiver - Black Polymer - 556 - 2

(6)

FMK Firearms AR1 Extreme AR-15 Stripped Lower Receiver – .223/5.56 – Black Polymer

Troy Carbine Length Battle Rail AR-15 Drop-In Quad Rail

(20)

Troy Carbine Length Battle Rail AR-15 Drop-In Quad Rail

Duramag AR-15 30 Round Aluminum Magazine - .223/5.56 NATO

(2)

Duramag Speed .223/5.56 NATO AR-15 Magazine – Aluminum – 30 Round – Orange Follower

Sale!

AT3 Tactical Flatline AR-15 Rifle - 5.56 NATO - Black

(1)

AT3™ AT-15 FLATLINE Rifle 16 Inch 5.56 NATO – 15 Inch M-LOK Handguard

Sale!

AT3™ SPEAR M-LOK™ AR-15 Free Float Handguard - 9 inch Length

(729)

AT3™ SPEAR Free Float AR-15 Handguard – 9, 12, & 15 Inch – M-LOK

Sale!

AT3 Pro Quad Rail - 7" Black

(309)

AT3™ Pro Quad Rail Free Float AR-15 Handguard – 7, 9, 12, & 15 Inch – Picatinny

Sale!

Precision Armament HYPERTAP Ti Muzzle Brake for AR-15 and AR-10

Precision Armament HYPERTAP Ti Muzzle Brake – Multiple Threads & Calibers

RECOMMENDED

Sale!

STNGR Complete AR-15 Upper Receiver with 16 Inch Barrel, BCG and Charging Handle - RPTR Handguard, Black

(1)

STNGR 16″ .223 Wylde Complete Assembled Upper Receiver w/ 15″ RPTR® Handguard, BCG & CH

RECOMMENDED

Sale!

STNGR Complete AR-15 Upper Receiver with 16 Inch Barrel, BCG and Charging Handle - VYPR Handguard, Black

(1)

STNGR 16″ .223 Wylde Complete Assembled Upper Receiver w/ 15″ VYPR® Handguard, BCG & CH

Black Warhammer with BCG

(55)

AT3™ Black Nitride 5.56 Bolt Carrier Group with Breek Arms Warhammer AR-15 Charging Handle

RECOMMENDED

(9)

AT3™ AT-15 M-LOK Builder Set – Anodized and Cerakote

(12)

Hexmag Shorty Compliant .223/5.56 NATO AR-15 Magazine – 10 Round

RECOMMENDED

AT3 Tactical AT-15 Quad Rail Builder Set - Upper, Lower, and Handguard - 15 Inch - Black

(6)

AT3™ AT-15 Quad Rail Builder Set – Anodized and Cerakote

(9)

Hexmag Shorty .223/5.56 NATO AR-15 Magazine – 20 Round

DAILY DEAL

Ruger Radial Muzzle Brake – 1/2×28 – .223 Rem / 5.56 NATO – Black

Ends Sat 10/17

Save 20%

AT3 Tactical Spear M-LOK Free Float Handguard 9 Inch with Slick Side Billet Upper Receiver

(164)

AT3™ AR-15 Upper Receiver and SPEAR Handguard Combo