This LBE Unlimited barrel is a cold hammer forged 13.7-inch AR-15 barrel chambered in 5.56 NATO. It has a 1:7 twist, a mid-length gas system and 1/2x28 muzzle threads, and a Melonite finish for wear and corrosion resistance. It is a solid base for a compact carbine or a refresh of an existing rifle.
- Fits: AR-15
- Caliber: 5.56 NATO
- Length: 13.7 in.
- Twist: 1:7
- Gas system: Mid-length
- Thread: 1/2x28
- Construction: Cold hammer forged
- Finish: Melonite
- Manufacturer part number: BAR137M
