10.5″ 4150V Chrome Moly vanadium steel, phosphate coated and chambered in 5.56 NATO with a 1 in 7″ twist. Carbine length gas barrel is finished off with a 12″ Slant End M-lok Rail, a low profile gas block and a Fluted Flash Can.

Holosun Micro 2 MOA Red Dot Sight:

The 403B is a small compact micro red dot optic. Employing Holosun’s LED technology, the lifetime for one CR2032 battery can be up to 5 years. This optic features our “Shake Awake” technology that powers the optic on with slight movement of the 403B. New advanced technology LED allows up to 50,000 hours of operation on one CR2032 battery (sold separately).

*Not for sale to residents of the states of New York or New Jersey.

In stock

SKU: AR15-556-PISTOL-BUILDKIT-10.5-222 Categories: , , , , , ,

Note: your jurisdiction may require you to be a licensed FFL or licensed gunsmith to purchase this product.

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Barrel Length |10.5"
Barrel Profile | A2
Gas System | Carbine-length
Barrel Steel | 4150V Chrome Moly Vanadium
Barrel Finish | Phosphate
Chrome Lining | No
Muzzle Thread | 1/2-28
Chamber | 5.56 NATO
Twist Rate | 1:7
Barrel Extension | M4
Diameter at Gas Block | .750
Gas Block Type | Low-profile
Muzzle Device | PSA Fluted Flash Can
Receiver Material | Forged 7075 T6 Aluminum
Receiver Type | M4
Handguard Type | PSA 12" Slant End M-Lok Rail
Bolt Carrier Group Included | Yes
Bolt Steel | Carpenter 158
Bolt Carrier Profile | Full-auto
Charging Handle Included | Yes
Overall Length: | 21"
Backup Sights | Magpul MBUS Front and Rear Flip-up Sights, Black
Optic | Holosun Micro 2 MOA Red Dot Sight

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