PSA PA-15 20" Nitride Rifle-Length 5.56 NATO Classic AR-15 Rifle W/Carry Handle, Black

Barrel Length: 20"
Gas System: Rifle-length
Barrel Steel: 4150V Chrome Moly Vanadium
Barrel Finish: Melonite
Chrome Lining: None
Muzzle Thread: 1/2-28
Chamber: 5.56 NATO
Twist Rate: 1 in 7"
Barrel Extension: M4
Diameter at Gas Block: .750"
Gas Block Type: F-marked FSB
Muzzle Device: A2 Style
Receiver Material: Forged 7075 T6
Receiver Type: M4
Hand guard Type: PSA Classic A2 Rifle Length Handguard
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
Bolt Carrier Profile: Full-auto
Charging Handle Included: Yes
Overall Length: 35"
Buttstock: PSA Classic A2
Grip: PSA Classic A2
Optics: PSA Mil-Spec AR-15 Carry Handle
Weight as configured: 6.5 lbs.

Features
Barrel: 20" Nitride 4150 Chrome Moly steel barrel, chambered in 5.56 NATO, with a 1/7 twist, M4 barrel extension, and a rifle-length gas system. The barrel is finished off with a PSA A2 Classic handguard, f-marked front sight base, and A2 flash hider.

Upper: Forged 7075-T6 A3 AR upper is machined to MIL-SPECS and hard coat anodized. Uppers include forward assist and dust cover.  These uppers are made for us right here in the USA by a mil-spec manufacturer.

Bolt: Full-auto profile bolt carrier group.  Shot-peened, mil-spec Carpenter No. 158  steel bolt and gas Key Hardened to USGI Specifications, Fastened with Grade 8 screws, and Staked Per Mil-Spec.  8620 steel M-16 profile carrier.

Lower: These forged lowers are quality made using 7075-T6 aluminum and are marked "MULTI" for caliber. The finish is hardcoat anodized. Mil-spec diameter 7075-T6 buffer tube is hardcoat anodized, and has an A2 butt stock and classic A2 grip.   The fire control group is a PSA classic mil-spec style, single-stage assembly.