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Stephen, this has a standard barrel - 10.5" Match Grade 416 Stainless Steel Barrel that's Threaded 1/2x28 TPI and a 1/7 twist rate.

It's standard and has a twist of 1:7 twist.

1 :7 twist see ******* Specifications and Features: Specifications and Features: Bushmaster XM-15 Enhanced Patrolman's AR Pistol 91022 AR-15 Semi Auto Pistol 5.56 NATO accepts .223 Remington 30 Rounds 10.5" Match Grade 416 Stainless Steel Barrel *******1:7 Twist Threaded 1/2x28 TPI 3 Prong AAC Flash Hider Phase 5 ambi single-point sling attachment Barnes Free Float Quad Rail Handguard Magpul Trigger Guard and Pistol Grip Aluminum pistol buffer tube Foam Cover Overall Length 26.75" Weight 5.2 lbs 10.5" Match Grade 416 Stainless Steel Barrel 1 Threaded 1/2x28 TPI 3 Prong AAC Flash Hider Phase 5 ambi single-point sling attachment Barnes Free Float Quad Rail Handguard Magpul Trigger Guard and Pistol Grip Aluminum pistol buffer tube Foam Cover Overall Length 26.75" Weight 5.2 lbs

Yo 1:7 rate of twist rate my brotha. It aint heavy.