PWS UXR .300 Blackout 14.5" - AR-15 Rifle

Purpose-built for the full range of what .300 Blackout can do, the PWS UXR .300 Blackout 14.5" moves seamlessly from quiet subsonic use to full-power supersonic performance — a genuinely versatile AR-15 build.

Built as a semi-automatic AR-15 rifle around .300 Blackout and a long-stroke piston system, the PWS UXR .300 Blackout 14.5" delivers a proven AR-15 experience from first round to last.

Quiet Subsonic Performance: Paired with a suppressor, subsonic .300 Blackout ammunition makes this one of the quietest centerfire rifles available — hearing-safe shooting without sacrificing reliability.

Full-Power Supersonic Option: When suppression is off the table, supersonic loads deliver genuine ballistic performance — substantially more energy than 5.56 at short to medium range.

Simple AR-15 Integration: This caliber requires only a barrel and BCG change from a standard 5.56 setup. Lowers, stocks, grips, and magazines remain the same — no new platform required.

Hunting and Defense in One: The .300 Blackout occupies a unique niche: subsonic for quiet defense and pest work, supersonic for hunting and extended-range use from the same rifle.

• Caliber: .300 Blackout
• Barrel Length: 14.5"
• Gas System: Long-Stroke Piston
• Handguard: Free-Float
• Muzzle Threading: 1/2x28
• Magazine Capacity: 30 Round
• Finish: Type III Hardcoat Anodized
• Origin: Made in the USA

Compatible with standard AR-15 lower receivers and accepts standard STANAG magazines. Requires a .300 Blackout-specific barrel and BCG — mag and lower remain the same as a 5.56 build.

Type III Hardcoat Anodized over 7075 aluminum construction gives this AR-15 rifle solid corrosion resistance and a durable surface that holds up across a wide range of storage and operating conditions.

Purpose-built for suppressed shooting, home defense, and hunting thin-skinned game at moderate range. A natural fit for suppressor owners who want subsonic capability from an AR-15 lower.

PWS (Primary Weapons Systems) builds long-stroke piston AR-15 rifles valued for exceptional reliability, reduced fouling, and consistent cycling across environmental extremes. Made in the USA.