© Palmetto State ArmoryPSA 18" Rifle-Length 6.5 Grendel 1:8 Stainless Steel 15" Lightweight M-Lok Upper With BCG & CH
- Brand
- Palmetto State Armory
- Category
- Gun Parts
- Platform
- AR-15
- Barrel Length
- 18in
- Gun Part Type
- Upper Receiver
- UPC
- 5165449160
Overview
This PSA AR-15 upper assembly features an 18-inch 416R stainless steel barrel chambered in 6.5 Grendel with a 1:8 twist and a rifle-length gas system. The upper is finished with a 15-inch lightweight M-Lok free-float rail, a .750 adjustable gas block, and an A2 flash hider. The upper receiver is a forged 7075-T6 A3 unit, machined to military specifications and hard-coat anodized. The assembly includes a full-auto profile bolt carrier group featuring a 9310 steel bolt (shot-peened) and an 8620 steel M-16 profile carrier that is nitride treated. The gas key is hardened to USGI specifications and fastened with grade-8 staked screws.
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