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If you buy something from this website, that means you accept all the risks and responsibilities involved. I dont offer any guarantees. I try and describe everything I sell the best I can. GODSPEED
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  4. PSA 18" or 20" Rifle-Length 5.56 NATO 1/7 Stainless Steel 15" Lightweight M-lok Upper Assembly With BCG & Charging Handle
PSA 18
PSA 18' or 20' Rifle-Length 5.56 NATO 1/7 Stainless Steel 15' Lightweight M-lok Upper Assembly With BCG & Charging Handle

PSA 18" or 20" Rifle-Length 5.56 NATO 1/7 Stainless Steel 15" Lightweight M-lok Upper Assembly With BCG & Charging Handle

Retail Price: $449.00
Retail Price:$699.00
You Save:$250.00(36%)
Part Number: 5231
Availability: In Stock.
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One New complete PSA 18" or 20" Rifle length gas system 5.56 Nato 1/7 Twist stainless steel free floated barrel 15" lightweight M-Lok handguard, with bolt carrier group and hand guard. 20" 416R stainless steel barrel.  Chambered in 5.56 NATO, with a 1:7 twist rate, M4 barrel extension, and a rifle-length gas system. Barrel is finished off with a PSA 15" Lightweight M-Lok free float rail, .750" low-profile gas block, and an A2-style flash hider.
Pick whether you want a 18" barrel or 20". If I run out of one, I will substitute with the other size. 

Upper: Forged 7075-T6 aluminum A3 AR upper is made to MIL-SPECS and hard coat anodized black for durability. These uppers are made for us right here in the USA by a mil-spec manufacturer.

Bolt: Full-auto profile bolt carrier group. Milspec Carpenter No. 158® steel bolt. Gas Key Hardened to USGI Specifications, Fastened with Grade 8 screws, and Staked per Mil-Spec.  

Product Details

Details

Barrel Length: 20"

Gas System: Rifle-length

Barrel Profile: A2 Style

Barrel Steel: 416R Stainless Steel

Barrel Finish: Stainless

Chrome Lining: None

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: A2 Flash Hider

Receiver Material: Forged 7075 T6

Receiver Type: M4

Handguard Type: PSA 15" M-Lok Lightweight Rail 

Bolt Carrier Group Included: Yes

Bolt Steel: Carpenter 158

Bolt Carrier Profile: Full-auto

Charging Handle Included: Yes

Overall Length: 26.5"

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