5.56 AR 15 Pistol Kit – 10.5″ Parkerized Barrel, 1:7 Twist Rate with 10″ M-Lok Handguard

Build the perfect AR pistol (or SBR), starting here.
The 10.5″ barrel is generally the “sweet spot” when it comes to building an AR pistol or SBR chambered in 5.56. It balances weight and size with muzzle velocity and accuracy, perfectly balancing power and maneuverability. This kit includes a prebuilt upper with an M16 BCG fed by a pistol-length gas system to ensure reliable cycling and extraction.
Note: Due to ATF rule 2021R-08F, any pistol with a stabilizing brace is considered a short-barreled rifle (SBR), and is therefore considered a National Firearms Act item requiring a federal tax stamp.
Barrel

Chamber: 5.56 NATO
Contour: M4/Government
Length: 10.5”
Twist Rate: 1:7
Gas System: Carbine
Gas Port: 0.750”
Gas Hole Dia.: 0.070”
Muzzle Threads: 1/2×28
Feed Ramps: M4
Material: 4150 CMV
Finish: Parkerized
Process: Button Rifled
Lining: None
Extension: M4
Muzzle: A2 “Birdcage” Flash Hider

Handguard

Attachment System: 10″ M-Lok
Finish: Type III Hardcoat Anodized (Mil-Spec)
Top Rail: M1913 Picatinny
Material: Billet 6061-T6 Aluminum
Attachment: Barrel Nut
Weight: 8.6 oz.

Upper Receiver

Profile: M4 Flattop
Material: Forged 7075-T6 Aluminum
Finish: Type III Hardcoat Anodized (Mil-Spec)

Bolt Carrier Group

Profile: M16/Full-Auto
Steel: Carpenter No. 158 (Mil-Spec)
Exterior: Black Nitride
Interior: Black Nitride
Gas Key: Staked, Chromed
Charging Handle: Included

Lower Receiver Parts

Buffer System: Mil-spec, Carbine
Pistol Brace: SB Tactical SBA3
Parts Kit: Mil-spec, single-stage

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