AT3 Tactical
AT3 Tactical
Fast, Free Shipping on Orders over $139
Quality Parts that Don't Break the Bank
4.8 Stars from 20.7K Reviews

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.

367 products
10% offAT3™ SPEAR M-LOK™ AR-15 Free Float Handguard - 9 inch Length

AT3™ SPEAR Free Float AR-15 Handguard – 9, 12, & 15 Inch – M-LOK
24 options
(729)
$100.49from $90.44
In stock
Black Warhammer with BCG

AT3™ Black Nitride 5.56 Bolt Carrier Group with Breek Arms Warhammer AR-15 Charging Handle
8 options
(55)
from $131.94
In stock
AT3 Pro Quad Rail - 7" Black

AT3™ Pro Quad Rail Free Float AR-15 Handguard – 7, 9, 12, & 15 Inch – Picatinny
32 options
(310)
from $114.99
In stock
Doorbuster

AT3™ AT-15 M-LOK Builder Set – Anodized and Cerakote
RECOMMENDED
+125 options
(9)
$274.99from $259.19
In stock

Hexmag Shorty Compliant .223/5.56 NATO AR-15 Magazine – 10 Round
4 options
(12)
from $12.99
In stock
AT3 Tactical AT-15 Quad Rail Builder Set - Upper, Lower, and Handguard - 15 Inch - Black

AT3™ AT-15 Quad Rail Builder Set – Anodized and Cerakote
RECOMMENDED
32 options
(6)
from $287.99
In stock

Hexmag Shorty .223/5.56 NATO AR-15 Magazine – 20 Round
4 options
(9)
from $11.99
In stock
8% offDuramag AR-15 Stainless Steel Magazine – .223/5.56/300BLK

Duramag .223/5.56/300BLK AR-15 Magazine – Stainless Steel – 20 Round
RECOMMENDED
(18)
$16.09$14.80
In stock
7% offProMag AR-15 Carbine Polymer Quad Rail HandGuard - PM242

ProMag Polymer Drop-In Quad Rail AR-15 Handguard – Carbine Length – Picatinny
(62)
$34.99$32.54
In stock
10% offUTG 30 Round 5.56 NATO Windowed Polymer Magazine - AT3 Tactical

UTG Windowed Polymer 5.56 NATO AR-15 Magazine – 30 Round
(17)
$11.97$10.77
In stock
OPEN BOX RETURN - AT3™ Mil Spec Buffer Tube Kit - AR-15

AT3™ Mil Spec Buffer Tube Kit For AR-15 – 9 Colors Available
+19 options
(93)
from $42.99
In stock
7% offDuramag AR-15 Stainless Steel Magazine 10 Round – .223/5.56/300BLK

Duramag .223/5.56/300BLK AR-15 Magazine – Stainless Steel – 10 Round
(17)
$15.29$14.22
In stock
8% offTroy Carbine Length Battle Rail AR-15 Drop-In Quad Rail

Troy Carbine Length Battle Rail AR-15 Drop-In Quad Rail
(20)
$191.99$176.63
In stock
10% offKAW Valley Precision Anti Walk Trigger Pins 2

KVP AR-15 Anti-Walk Pin Kit – Set of 2
DAILY DEAL
(2)
$9.95$8.96
In stock
AT3 Tactical Spear M-LOK Free Float Handguard 9 Inch with Slick Side Billet Upper Receiver

AT3™ AR-15 Upper Receiver and SPEAR Handguard Combo
24 options
(164)
from $174.99
In stock
SB Tactical HBPDW AR-15 Pistol Brace

SB Tactical HBPDW AR-15 Pistol Brace
2 options
(7)
from $239.99
In stock
Duramag Speed AR-15 30 Round Aluminum Magazine - .223/5.56 NATO - Black Follower

Duramag Speed .223/5.56 NATO AR-15 Magazine – Aluminum – 30 Round – Black Follower
8 options
(34)
from $13.69
In stock

Daniel Defense AR-15 Barrel – 5.56 NATO – 18″ – S2W Heavy Profile – Rifle-Length – 1:7 Twist
NEW
$365.00
In stock

KAK Industry Retro Extended Flash Hider – 1/2×28 – 5.56 NATO – 6.15″ – Pin & Weld Ready
NEW
$28.49
In stock

STNGR AR-15 Barrel – 16″ – .223 Wylde – Government Profile – Mid-Length – 1:8 Twist
NEW
$99.99
In stock

KAK Industry Retro Taper 3-Prong Flash Hider – 1/2×28 – 5.56 NATO
NEW
$13.49
In stock

KAK Industry A1 Flash Hider – 1/2×28 – 5.56 NATO
NEW
$6.99
In stock

LANTAC Dragon Plan B Muzzle Brake – 1/2×28 – .223 Rem / 5.56 NATO – Short
NEW
$89.00
In stock

Noveske 2-Port Muzzle Brake – 1/2×28 – 5.56 NATO – w/Crush Washer
NEW
$89.00
In stock
Popular:
handguardmagpulbuffer tubebcgcharging handleforegrippmagslingstockbuffer

Sign in

Orders, tracking, Gun Bucks and saved addresses.

New to AT3? Create an account

Create an account

Track orders, earn Gun Bucks on every purchase, check out faster.

8+ characters with at least one letter and one number.

By creating an account you agree to the Terms of Use and Privacy Policy.

Already have an account? Sign in

Your cart