Barrels

This barrel is specifically engineered for the LMT monolithic receiver, featuring a low-profile gas block, carbine-length straight gas tube, and an A2 birdcage to minimize flash. It is coated and cryogenically treated to ensure long-lasting durability...

Complete top end includes: Standard flattop upper receiver 10.5" chrome lined 1:7” twist 5.56 barrel Full-auto bolt carrier group Tactical charging handle Handguards

This upper comes equipped with adjustable sights, and its push-button takedown allows for quick and effortless swaps—easier than switching between open sights and an optic. It’s the ideal backup barrel for those who put plenty of .22 LR...

This upper is our most budget-friendly option and a DIY enthusiast’s dream. It offers excellent value for those planning to use an optic or customize their barrel length, provided they have a lathe for the modifications. Brand new No sights (may...

The Proof Research 16" .300 Blackout LMT MRP Converted Barrel (100561CONV) is a precision carbon fiber barrel conversion designed to transform LMT MRP (Modular Rail Platform) rifles into .300 Blackout-capable platforms. The 16-inch length provides a...

This is a used like new UTM (Ultimate Training Munitions) Glock 19 Gen 5 MMR/TBR Conversion Kit slide that is bundled with one 50-round box of UTM man marker training rounds and two Glock OEM 10-round magazines with a orange in color training baseplate...

The Proof Research 24" .264 Caliber Bolt Action Rifle Barrel (100912) is a premium carbon fiber barrel for bolt-action rifle builders seeking maximum velocity and match accuracy from 6.5mm cartridges including 6.5 Creedmoor, 6.5 PRC, and .264 Win Mag...

By designing a bolt action barrel blank, we have opened up countless options for chambering in your favorite caliber and having the ability to fit a large variety of actions. Our bolt-action barrels are available in a variety of calibers, lengths,...

The Proof Research 22" .264 Caliber Bolt Action Rifle Barrel (105511) is a precision carbon fiber barrel for custom bolt-action rifle builds chambered in 6.5mm cartridges including 6.5 Creedmoor, 6.5 PRC, .260 Remington, and other .264-bore precision...

The Proof Research 24" .284 Caliber Bolt Action Rifle Barrel (100943) is a match-grade, carbon fiber wrapped precision barrel designed for custom bolt-action rifle builds in .284 Winchester, 7mm-08 Remington, and other .284-bore cartridges. Proof...

Sig Sauer 9” complete stainless steel barrel and gas block assembly compatible with MCX SPEAR LT pattern firearms chambered in .300 Blackout. *Please Note: All NFA rules apply to the installation of these upper assemblies to lower...

Proof Research 6 ARC barrels are impressively lightweight, offering up to a 64% weight reduction compared to standard steel barrels. Engineered to handle extreme temperatures. Staying cooler significantly extends their lifespan. Encased in...