Find it here: https://doublemdefense.com/product/psa-7-5-300blk-ar15-pistol/

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Factory New.

UPC: 51655156644
SKU: 51655156644

Item Description:

Barrel: 4150V chrome-moly steel chambered in 300 Blackout, with a 1:7 twist rate, M4 barrel extension, pistol-length gas system, and nitride treated for accuracy and durability. The heavy profile barrel is finished off with a PSA 6" Lightweight Hex Full Picatinny M-Lok Free Float Rail, .750" low-profile gas block, and A2 Flash Hider.

Upper: Forged 7075-T6 A3 AR upper is hard coat anodized. These uppers are made for us right here in the USA!

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

Lower: These forged lowers are quality made using 7075-T6 aluminum and are marked "MULTI" for caliber. The finish is hard coat anodized. The 7075-T6 buffer tube is hard coat anodized and is fitted with an SB Tactical SBA3 Adjustable Pistol Brace, Magpul MOE Grip and Polymer Trigger Guard, and Enhanced Polished Trigger (EPT).

Item Specifications:

Barrel Length: 7.5" 
Gas System:
 Pistol-length
Barrel Profile: Heavy
Barrel Steel: 4150V Chrome Moly Steel
Barrel Finish: Nitride
Chrome Lining: None
Muzzle Thread:
Chamber: 300 Blackout
Twist Rate: 1 in 8"
Barrel Extension: M4
Diameter at Gas Block: .750"
Gas Block Type: Low-profile
Muzzle Device: A2 Flash Hider
Receiver Material: Forged 7075 T6 Aluminum
Receiver Type: A3
Handguard Type: PSA 6" Lightweight Hex Full Picatinny M-Lok Free Float Rail
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
Bolt Carrier Profile: Full-auto
Charging Handle Included: Yes
Lower Receiver: Forged 7075 T6 Aluminum
Receiver Finish: Hardcoat Anodized Black
Fire Control Group: Single-Stage, Enhanced Polished Trigger
Grip: Magpul MOE Grip, Black
Buffer Tube: 7075 T6 Aluminum
Adjustment: Fixed
Pistol Brace: SB Tactical SBA3 Adjustable Pistol Brace, Black
Magazine: 30 Round Magazine (1)