Make: Primary Weapons Systems (PWS) Model: MK1 Alpha Caliber: 5.56x45mm NATO / .223 Rem (Receiver marked: CAL: MULTI) Action Type: Semi-Automatic, Long-Stroke Piston System Serial: A4-100 Furniture: Flat Dark Earth (FDE) Magpul MOE-SL Stock and Magpul MOE-K2 Pistol Grip (See photos) Finish Clear Anodized Aluminum Upper and Lower Receivers, Factory Anodized M-LOK Handguard, Matte Black Barrel Assembly Finish Originality: Original Finish (See Photos) Barrel Length: 14.5" Barrel (Pinned and Welded to 16"+ Compliant Overall Length) Bore Condition: Clean with no pitting Overall Condition: Great condition (See photos) Mechanics: Functions as expected. What's included: Rifle as pictured. Description: This Primary Weapons Systems (PWS) MK1 Alpha is a limited-edition semi-automatic rifle chambered in 5.56 NATO. Built on PWS's signature long-stroke piston operating system, it includes a front-accessible adjustable gas regulator. The rifle features clear anodized aluminum upper and lower receivers paired with a factory anodized free-float M-LOK handguard marked 'ALPHA LT'. The 14.5-inch barrel is fitted with a factory pinned and welded muzzle brake, achieving a compliant 16-inch-plus overall length. The lower receiver offers fully ambidextrous controls, an enhanced fluted buffer tube, and Flat Dark Earth furniture comprising a Magpul MOE-SL collapsible stock and a Magpul MOE-K2 pistol grip. Marked with serial number A4-100, this firearm is number 100 from this limited production run.