Rock River Arms LAR-15M CLB Complete Upper, 458 SOCOM 16" Chome Moly Bull Barrel, Black, Aluminum Rec, 13" M-LOK Handguard, Beast Brake, Fits AR-15 SOC0820V1

The Rock River Arms LAR-15M CLB Complete Upper, .458 SOCOM, 16" Chrome Moly Bull Barrel, Black Aluminum Receiver, 13" M-LOK Handguard, Beast Brake (SOC0820V1, UPC 842834101306) is a heavy-hitting AR-15 upper built for shooters who want big-bore stopping power with Rock River’s proven reliability. Designed to pin directly onto any standard mil-spec AR-15 lower, this complete upper lets you turn your rifle into a devastating .458 SOCOM platform for hunting, defense, or range fun with minimal effort. Palmetto State Armory+2Ammunition Depot+2 Big-Bore Power: .458 SOCOM for AR-15 Platforms Chambered in .458 SOCOM, this LAR-15M CLB upper brings serious energy and large-diameter projectiles to the AR-15. Originally designed to increase terminal performance from the AR platform, .458 SOCOM is known for: Heavy bullets and excellent close-to-midrange impact Strong performance on hogs, deer, and other medium-to-large game Impressive stopping power for specialized defensive or tactical roles Palmetto State Armory+1 Because it’s a complete upper, you can swap from 5.56/.223 to .458 SOCOM simply by changing uppers (and using appropriate magazines), without buying a whole new rifle. Palmetto State Armory+1 16" Chrome Moly Bull Barrel – Precision & Durability At the heart of this upper is a 16-inch chrome moly bull barrel engineered for strength and accuracy. Ammunition Depot+2Palmetto State Armory+2 Key barrel features: Bull barrel profile for added rigidity and tighter shot-to-shot consistency Chrome moly steel construction for excellent barrel life and durability under heavy loads 1:14" twist rate, optimized for stabilizing typical .458 SOCOM bullet weights Ammunition Depot+2rockriverarms.com+2 Black finish that matches the upper receiver and handguard for a clean, tactical look RK Guns+1 This setup gives you a robust, accurate barrel that’s purpose-built for the hard-recoiling .458 SOCOM cartridge. RRA Beast Brake – Taming .458 SOCOM Recoil To help manage the punch of .458 SOCOM, Rock River Arms equips this upper with their RRA Beast Brake muzzle device. tacticalshopcenter.com+4Ammunition Depot+4Palmetto State Armory+4 Threaded 5/8x32 to match the barrel Multi-port brake design that redirects gases to reduce felt recoil and muzzle rise Helps you get back on target faster for quick follow-up shots On a big-bore AR, a quality brake makes a big difference in comfort and controllability—especially during extended range sessions or when shooting from awkward field positions. Forged Aluminum Receiver – Mil-Spec Compatible The LAR-15M CLB Complete Upper uses a forged A4-style aluminum receiver, finished in black to match most AR-15 lowers. firearmsdepot.com+2alpinerange.com+2 Compatible with standard AR-15 mil-spec lowers Flat-top Picatinny rail for mounting optics, red dots, or BUIS Designed as a drop-on solution—just pin it to your lower, add sights/optic, and you’re ready to go MidwayUSA+2Palmetto State Armory+2 This makes it ideal both for finishing a new build and for quickly swapping calibers on a favorite lower. 13" Lightweight Aluminum Free-Float M-LOK Handguard Up front, this Rock River Arms .458 SOCOM upper features a 13-inch lightweight aluminum free-float handguard with M-LOK slots. tacticalshopcenter.com+3Ammunition Depot+3Palmetto State Armory+3 Handguard benefits: Free-float design helps maximize accuracy by keeping pressure off the barrel M-LOK slots along the handguard give you flexible mounting for bipods, foregrips, lights, lasers, and QD sling attachments Extended 13" length provides plenty of real estate for support-hand placement and accessories without adding excessive weight Combined with the flat-top receiver rail, you get a continuous optics and accessories platform well-suited to both hunting optics and tactical setups. Palmetto State Armory+1 Complete Upper – Includes BCG & Charging Handle Unlike some stripped uppers, the SOC0820V1 is sold as a complete upper assembly: Bolt carrier group included Charging handle included tacticalshopcenter.com+3Ammunition Depot+3Palmetto State Armory+3 That means no hunting for compatible big-bore parts—you get a ready-to-run top end that can be installed on a compatible lower as soon as it arrives (following all safety procedures and local laws). Low-Profile Gas Block for Reliable Cycling The Rock River Arms LAR-15M CLB upper uses a low-profile gas block tucked neatly under the free-float handguard. tacticalshopcenter.com+3Ammunition Depot+3rockriverarms.com+3 Keeps the front end clean and snag-free Supports reliable cycling with the .458 SOCOM round Allows full-length handguard coverage for maximum accessory mounting space This system is tuned to deliver dependable performance with quality .458 SOCOM ammunition when properly gassed and maintained. Ideal For: Hunters, Big-Bore Enthusiasts & AR Builders The Rock River Arms LAR-15M CLB Complete Upper .458 SOCOM (SOC0820V1) is an excellent choice if you: Want a big-bore AR-15 upper for hogs, deer, and other close-to-midrange game Need a factory-built, ready-to-run complete upper with matched BCG and charging handle Prefer a bull barrel and free-float M-LOK handguard for accuracy and versatility Appreciate Rock River’s reputation for quality parts used by hunters, law enforcement, and serious shooters Palmetto State Armory+2Palmetto State Armory+2 Whether you’re upgrading an existing rifle or building a new big-bore hunting rig, this upper gives you serious capability with minimal guesswork. Key Specs – Rock River Arms LAR-15M CLB Complete Upper .458 SOCOM Manufacturer: Rock River Arms Ammunition Depot+2Palmetto State Armory+2 Model: LAR-15M CLB Complete Upper SKU / MPN: SOC0820V1 tacticalshopcenter.com+4Ammunition Depot+4Palmetto State Armory+4 UPC: 842834101306 tacticalshopcenter.com+4Ammunition Depot+4Palmetto State Armory+4 Caliber: .458 SOCOM Barrel Length: 16" chrome moly bull barrel, black finish, approx. 1:14" twist tacticalshopcenter.com+4Ammunition Depot+4Palmetto State Armory+4 Muzzle Device: Rock River Arms Beast Brake, threaded 5/8x32 tacticalshopcenter.com+4Ammunition Depot+4Palmetto State Armory+4 Gas Block: Low-profile gas block Handguard: 13" lightweight aluminum free-float M-LOK handguard, black tacticalshopcenter.com+3Ammunition Depot+3Palmetto State Armory+3 Receiver: Forged A4 aluminum upper, flat-top Picatinny rail, black finish firearmsdepot.com+2MidwayUSA+2 Compatibility: Fits standard AR-15 mil-spec lower receivers Included: Complete upper assembly with bolt carrier group and charging handle tacticalshopcenter.com+3Ammunition Depot+3Palmetto State Armory+3 If you’re ready to step into the world of big-bore AR performance with a trusted, factory-complete package, the Rock River Arms LAR-15M CLB Complete Upper .458 SOCOM SOC0820V1 delivers rugged construction, serious stopping power, and modern M-LOK versatility in one ready-to-mount unit. 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