AT3™ Assembled Pistol Upper for AR-15 – 10.5″ 5.56 NATO Barrel with 12″ SPEAR M-LOK Handguard
Built to Order – Ships Within 3 Business Days
This assembled upper delivers a compact, hard-hitting platform for AR pistol builds and SBR conversions. This is the foundation for shooters building a maneuverable home defense weapon, a truck gun, or a compact range blaster where you need something short but still want the reliability out of a 5.56. The extra handguard length over the barrel gives you flexibility for hand placement and accessory mounting without worrying about heat or blast.
The 10.5-inch government profile barrel in 5.56 NATO pairs with a carbine-length gas system for reliable cycling with a wide range of ammunition, while the 12-inch SPEAR free-float handguard provides ample real estate for lights, lasers, and grips without adding bulk.
Built on AT3’s forged upper receiver with forward assist and dust cover installed, this setup pairs a low-profile .750 steel gas block and stainless gas tube for reliable function. The KAK Slimline flash can redirects concussion forward and gives the muzzle a clean, finished look.
Note: Does not include bolt carrier group or charging handle. The upper is shipped fully assembled.
Features
- 10.5-inch government profile barrel with carbine-length gas system
- 12-inch SPEAR M-LOK free-float handguard for accessory mounting
- Forged upper receiver with forward assist and dust cover installed
- Low-profile .750 steel gas block and stainless steel gas tube
- KAK Slimline flash can redirects muzzle blast forward
- Available in Black, Flat Dark Earth, and OD Green
Specifications
- Brand: AT3 Tactical
- Model: Assembled Forged Pistol Upper for AR-15 – 5.56 NATO – 10.5″ Barrel – 12″ Handguard – No BCG/CH
- MPN: FFML-FOR-P-SPEAR-105-6
- Caliber: 5.56 NATO
- Barrel Length: 10.5 inches
- Barrel Profile: Government
- Gas System: Carbine length
- Handguard Length: 12 inches
- Handguard Type: M-LOK free-float
- Upper Receiver: Forged with forward assist and dust cover
- Gas Block: .750 low-profile steel
- Muzzle Device: KAK Slimline flash can (1/2×28 thread)
- Color Options:
- Black – Type 3 Hardcoat Anodized
- Flat Dark Earth – H-267 Cerakote Magpul® Flat Dark Earth
- OD Green – H-232 Cerakote Magpul® OD Green
What’s Included – Installed
- 1x Assembled Upper Receiver
- 1x 12″ SPEAR M-LOK Handguard
- 1x 10.5″ 5.56 NATO Government Profile Barrel
- 1x KAK Slimline Flash Can
- 1x 1/2″ Crush Washer
- 1x Carbine-Length Gas Tube
- 1x Low-Profile Gas Block
- 1x Forward Assist
- 1x Dust Cover
Products available on this page:
- AT3™ Assembled Forged Pistol Upper for AR-15 - 5.56 NATO - 10.5" Barrel - 12" Handguard - No BCG/CH - 3 Colors - Black - Color: Black | SKU: FFML-FOR-P-SPEAR-105-6-BLK
- AT3™ Assembled Forged Pistol Upper for AR-15 - 5.56 NATO - 10.5" Barrel - 12" Handguard - No BCG/CH - 3 Colors - Flat Dark Earth - Color: Flat Dark Earth | SKU: FFML-FOR-P-SPEAR-105-6-FDE
- AT3™ Assembled Forged Pistol Upper for AR-15 - 5.56 NATO - 10.5" Barrel - 12" Handguard - No BCG/CH - 3 Colors - OD Green - Color: OD Green | SKU: FFML-FOR-P-SPEAR-105-6-ODG
