The LMT Monolithic 5.56x45 NATO 11.5" Carbine Length Barrel Black is a factory barrel assembly built specifically for LMT’s MRP monolithic upper receivers. This 11.5-inch chrome lined barrel uses a low profile gas block, straight carbine-length gas tube, and an A2 birdcage flash hider to deliver dependable performance and reduced muzzle flash in a compact package.

Ideal for short, handy AR builds, this barrel offers reliable cycling with 5.56x45 NATO ammunition while maintaining durability through its chrome moly steel construction, manganese phosphate finish, and cryogenic treatment. Whether you are setting up a dedicated training carbine or a compact range rifle, this MRP-compatible barrel reflects LMT Defense’s focus on precision manufacturing and long-term service life.

Key Features:

• Manufacturer: LMT Defense
• Model: MRP 11.5" Monolithic Barrel Assembly
• Caliber: 5.56x45 NATO (.223 Rem)
• Barrel Length: 11.5"
• Gas System Length: Carbine
• Twist Rate: 1:7" Right-Hand
• Bore: Chrome Lined
• Muzzle Device: A2 Birdcage Flash Hider
• Gas Block: Low Profile With Straight Gas Tube
• Operating Method: Direct Impingement
• Material: Chrome Moly Steel