Big Fall Sale – Save up to 35% | Shop Now

Big Fall Sale – Save up to 35% | 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 349 results

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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

(727)

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

Sale!

AT3 Pro Quad Rail - 7" Black

(308)

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

DAILY DEAL

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

Precision Armament HYPERTAP Ti Muzzle Brake – Multiple Threads & Calibers

Ends Thursday

Save 25%

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

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

Sale!

(1)

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

Sale!

(1)

AT3 Tactical AR-15 Barrel – 16″ – 5.56 NATO – Pencil 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!

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!

STNGR HWK Complete 5.56 Pistol Upper with 12.5 Barrel and Flash Can - Black

STNGR 12.5 Inch 5.56 Complete Assembled Upper w/ 13.5 Inch HWK® Handguard, BCG & CH

Sale!

AT3™ 10.5 Inch Complete AR-15 Pistol Upper - 10.5 Inch Faxon .223/5.56 SOCOM Barrel - With Nickel Boron BCG and Mil-Spec CH

AT3™ .223/5.56 10.5″ Complete Assembled AR-15 Upper – With Nickel Boron BCG and Charging Handle

Sale!

STNGR RPTR Complete 5.56 Pistol Upper with 12.5 Barrel and Flash Can - Black

STNGR 12.5 Inch 5.56 Complete Assembled Upper w/ 13.5 Inch RPTR® Handguard, BCG & CH

Sale!

STNGR HWK Complete 5.56 Pistol Upper with 11.5 Barrel and Flash Hider - Black

STNGR 11.5 Inch 5.56 Complete Assembled Upper w/ 10 Inch HWK® Handguard, BCG & CH

Sale!

STNGR 11.5 Inch 5.56 Complete Assembled Upper w/ 10 Inch VYPR® Handguard, BCG & CH - 3 Colors

STNGR 11.5 Inch 5.56 Complete Assembled Upper w/ 10 Inch VYPR® Handguard, BCG & CH – 3 Colors

Sale!

STNGR RPTR Complete 5.56 Pistol Upper with 11.5 Barrel and Flash Hider - Black

(1)

STNGR 11.5 Inch 5.56 Complete Assembled Upper w/ 10 Inch RPTR® Handguard, BCG & CH

Sale!

STNGR VLCN Complete 5.56 Pistol Upper with 11.5 Barrel and Flash Hider - Black

STNGR 11.5 Inch 5.56 Complete Assembled Upper w/ 10.5 Inch VLCN® Handguard, BCG & CH

Sale!

STNGR VLCN Complete 5.56 Pistol Upper with 11.5 Barrel and Flash Can - Black

STNGR 11.5 Inch 5.56 Complete Assembled Upper w/ 12.5 Inch 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!

STNGR 14.5 Inch 5.56 Complete Upper w/ 15 Inch HWKXL® Handguard, BCG & CH

STNGR 14.5 Inch 5.56 Complete Upper w/ 15 Inch HWKXL® Handguard, BCG & CH

Sale!

AT3 Tactical Rifle Kit with Lightweight Barrel Black

(7)

AT3 Tactical 16″ 5.56 NATO Pencil Barrel AR-15 JNL Ready Build Kit – M-LOK / Magpul CTR

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