The Rock River Arms LAR-BT3 X-Series X-1 with Magpul GEN3 Precision Rifle Stock is a 20-inch .308 built for long-range accuracy (brand part no. XBT31752BV1). The fluted stainless barrel is cryogenically treated with a 1:10 twist and wears an RRA Hunter muzzle brake. A rifle-length gas system, billet receivers and a 17-inch free-float rail with M-LOK slots round out the platform. The Magpul GEN3 Precision stock offers adjustable cheek riser and length of pull. It is built for shooters who need a heavier, stable .308 for precision shooting or hunting at distance.

Key Specifications

• The chamber is .308 Winchester / 7.62x51mm NATO, a standard for precision and hunting work.
• The barrel is a 20-inch fluted stainless profile, cryogenically treated with a 1:10 twist.
• The muzzle device is the RRA Hunter muzzle brake on a 5/8×24 thread, which tames recoil.
• The gas system is a rifle-length system with a low-profile gas block, softening the recoil impulse.
• Both receivers are RRA LAR-BT3 billet parts.
• The trigger is an RRA Two Stage Ultra Match Varmint trigger.
• The handguard is a 17-inch lightweight free-float rail with M-LOK compatibility.
• The stock is a Magpul GEN3 Precision Rifle Stock, adjustable for fit, with a Hogue rubber grip.
• Weight is 9.7 pounds and length is 41 inches retracted; accuracy is rated at 1 MOA at 100 yards.
• The rifle ships with one magazine, a case, an extended charging handle latch, a manual and warranty information.

Frequently Asked Questions

What is different about this X-1 version? It has a 20-inch barrel, a rifle-length gas system and a Magpul GEN3 Precision Rifle Stock.

Is it fitted with a muzzle brake? Yes. It has an RRA Hunter muzzle brake on a 5/8×24 thread.

What does the rifle ship with? It ships with one magazine, a case, an extended charging handle latch, a manual and warranty information.

Buy the Rock River Arms LAR-BT3 X-Series X-1 Rifle, .308 Win, 20-Inch Fluted Stainless Barrel, Magpul GEN3 Precision Stock, Hunter Muzzle Brake

This X-1 puts a 20-inch barrel behind a Magpul precision stock. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and browse more AR rifles from Rock River Arms.