Battle Arms Development Lightweight Barrel for AR Rifles – 9MM, 8.5″, 1:10 Twist, 1/2×36 Threaded, Black Nitride (A-BBL8.5T9MM1-10BN)

• Lightweight 8.5 inch barrel chambered in 9mm designed for AR rifle builds
• 4140 steel construction with black nitride finish for corrosion resistance
• 1/2x36 threaded muzzle supports common 9mm muzzle devices and suppressor mounts
• 1:10 twist rate supports stable performance with standard 9mm projectiles
• Improved feed ramp design supports reliable cycling in AR9 platforms
• Lightweight barrel profile supports balanced handling for compact AR builds

The Battle Arms Development Lightweight 9MM 8.5″ Barrel is a rifle barrel designed for AR rifle builds and caliber conversion use. This 9MM barrel features an 8.5 inch length with a 1:10 twist rate and 1/2×36 threaded muzzle interface. It is designed to fit AR rifle platforms and supports standard 9MM configurations.

The Battle Arms Development Lightweight 9MM 8.5″ Barrel is constructed from 4140 steel with a black nitride finish and includes an improved feed ramp design. This rifle barrel uses a threaded interface for muzzle device attachment and maintains a lightweight barrel profile. It is used for range use and general firearm assembly where compact barrel length is required. The 1/2×36 thread pitch supports common 9MM muzzle accessories, and the nitride finish provides a consistent surface treatment for extended service life.