AT3 Tactical
AT3 Tactical
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AT3 Tactical AR-15 Build Kits and Assemblies

Complete AR-15 upper receivers, lower build kits, and even complete rifle kits from AT3 Tactical are found here!  AT3 uses quality components that will make your new rifle even greater than the sum of its parts.

123 products
DoorbusterAT3 Tactical AT-15 M-LOK Builder Set - Lower, Upper, and SPEAR M-LOK Handguard

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

AT3™ AT-15 Lower and Upper Receiver Set – Anodized and Cerakote
8 options
(2)
$192.99from $173.69
In stock
AT3 Tactical AT-15 Quad Rail Builder Set - Lower, Upper, and Pro Quad Rail Handguard

AT3™ AT-15 Quad Rail Builder Set – Anodized and Cerakote
RECOMMENDED
32 options
(6)
from $287.99
In stock
10% offAT3 Pro-Builder AR-15 Lower Build Kit

AT3™ Pro-Builder™ Black AR-15 Lower Build Kit
(3)
$74.99$67.49
In stock
10% offAT3 AR-9 Barrel Builder Kit – 8.3″ 9mm Straight Profile Barrel & BCG

AT3 AR-9 Barrel Builder Kit – 8.3″ 9mm Straight Profile Barrel & BCG
$200.99$180.89
In stock
AT3 Tactical AR-15 Ultimate Cerakote Color Upgrade Kit - Flat Dark Earth

AT3 Tactical AR-15 Ultimate Cerakote Color Upgrade Kit
8 options
(10)
from $123.99
In stock
AT3 Tactical Spear with Magpul MOE Free-Float Furniture Kit

AT3 SPEAR Furniture Kit – AT3 AR-15 M-LOK Handguard, Magpul MOE Stock & Grip
24 options
(84)
from $168.99
In stock
AT3 AR-15 Billet Upper and M-LOK Handguard with Cerakote Finishes - 7 Colors

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

AT3™ Forged Upper Receiver and SPEAR Handguard Combo
21 options
(17)
from $190.99
In stock
AT3 Tactical AR-15 Enhanced Cerakote Color Upgrade Kit - Flat Dark Earth

AT3 Tactical AR-15 Enhanced Cerakote Color Upgrade Kit
8 options
(9)
from $78.99
In stock
"Comments Section Carbine" 5.56 NATO 12.5" AR Pistol - Audience Dream Build

“Comments Section Carbine” 5.56 NATO 12.5″ AR Pistol – Audience Dream Build
NEW
$2,389.99
In stock
10% offAT3 Tactical AR-15 Cerakote Color Upgrade Kit - Flat Dark Earth

AT3 Tactical AR-15 Cerakote Color Upgrade Kit
8 options
(14)
$35.49from $31.94
In stock
AT3™ Slick Side Upper Receiver and SPEAR XL Suppressor Ready Handguard Combo

AT3™ Slick Side Upper Receiver and SPEAR XL Suppressor Ready Handguard Combo
16 options
(1)
from $237.99
In stock
AT3 Tactical Ambi Complete AR-15 Lower Receiver - No Stock

AT3 Tactical Ambi Complete AR-15 Lower Receiver – No Stock
NEW
$252.15
Out of stock
AT3™ Forged Upper Receiver and SPEAR XL Suppressor Ready Handguard Combo

AT3™ Forged Upper Receiver and SPEAR XL Suppressor Ready Handguard Combo
16 options
(2)
from $229.99
In stock
AT3 Tactical Billet Upper and Pro Quad Rail AR-15 Handguard Combo with Cerakote Finishes

AT3™ AR-15 Upper Receiver and Pro Quad Rail Handguard Combo
32 options
(20)
from $187.99
In stock

AT3™ Forged AR-15 Upper Receiver and Pro Quad Rail Combo
28 options
(4)
from $203.99
In stock

AT3 AR-15 Lower Build Kit – Magpul Stock and Grip, AT3 Lower Parts Kit and Buffer Assembly
3 options
(5)
from $225.49
In stock
10% offAT3 Tactical 16 Inch 5.56 NATO Lightweight Complete AR-15 Upper Assembly - No BCG or Charging Handle

AT3™ Assembled AR-15 Upper – .223/5.56 16″ Ballistic Advantage Barrel – No BCG/CH
16 options
(10)
$398.99from $381.59
In stock
Black and Tan” 5.56 NATO 13.7" Home Defense AR Pistol – September Dream Build

“Black and Tan” 5.56 NATO 13.7″ Home Defense AR Pistol – September Dream Build
NEW
$2,069.98
In stock
AT3 Tactical Rifle Kit with Lightweight Barrel FDE

AT3 Tactical 16″ 5.56 NATO Pencil Barrel AR-15 JNL Ready Build Kit – M-LOK / Magpul CTR
3 options
(7)
from $727.49
In stock
AT3™ FF-ML 11.5" Complete Pistol Upper - .223/5.56 11.5" Ballistic Advantage Barrel - 12" M-LOK Free Float Handguard

AT3™ 11.5″ Assembled AR-15 Pistol Upper – .223/5.56 11.5″ Ballistic Advantage Barrel – No BCG/CH
8 options
(25)
from $385.49
In stock
AT3 Tactical 10.5 Inch 300 BLK Complete AR-15 Upper Assembly - No BCG or Charging Handle

AT3™ 10.5 Inch .300 Blackout Assembled Pistol Upper for AR-15 – No BCG/CH
8 options
(13)
from $402.49
In stock
AT3 Barrel Builder Kit – 7.5″ .300 Blackout Medium Profile Pistol Length Barrel, Gas Block, Gas Tube & BCG

AT3 Barrel Builder Kit – 7.5″ .300 Blackout Medium Profile Pistol Length Barrel, Gas Block, Gas Tube & BCG
$211.99
In stock
Popular:
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