CMC Triggers 16.25in AR15 Barrel 5.56 Nato 1/7 41V50 CRMOV Black. 25? 5.56 1:7 41V50 CrMoV was designed to be the perfect addition to any new or current rifle build. The San Tan Tactical SOCOM Profile barrel is not too light and not too heavy making it perfect for modern rifle builds. Features: CMC AR15 barrels are made from 4150 Chrome Moly Vanadium coated in H&M Blacknitride+ for increased wear resistance chambered in 5.56 NATO ammo. CMC incorporated input received from military law enforcement and civilian shooters into the engineering of their AR15 barrels to accommodate modern-day shooting requirements. Every barrel is precision instrument-inspected for absolute straightness and air gauged for maximum uniformity yielding the highest accuracy possible. Land and groove tolerance from breech to muzzle can vary only .0001? for the best concentricity. When using factory loaded SAAMI approved Match Grade ammunition you can expect 1 MOA level accuracy (or better) out of CMC barrels at 100 yards. Keep in mind that headspace component selection assembly methods external variables such as the shooter environmental conditions and ammunition will all have an impact on group sizes. CMC only recommends that you use factory new SAAMI approved ammunition in CMC barrels. CMC stands behind their barrels performing 1 MOA (or better) when Match Grade ammo is used. CMC AR15 barrels are then coated in H&M Blacknitride+ or Ferritic Nitrocarburizing resulting in significantly improved surface properties on ferrous metal parts while maintaining dimensional and shape stability. H&M Blacknitride+ yields increased wear resistance improved fatigue strength better corrosion resistance improved lubricity and enhanced cosmetic appeal. Features: Mid length gas system 1:7? twist rate M4 feed ramps for reliability Air Gauged tested for consistency 1/2?x28 thread pattern to fit standard AR-15 muzzle devices 11 match crown for increased accuracy bottom dimple for easy gas block install and alignment Technical Specs: Barrel Length: 16.25? Barrel Profile: SOCOM Barrel Material: 4150 Chrome Moly Vanadium Barrel Type: Button Rifled Barrel Coating: H&M Blacknitride+ Barrel Caliber: 5.56 Barrel Gas System: Mid Length Barrel Twist: 1:7 Barrel Extension: M4 Type Feed Ramps Gas Block Diameter: .750? Gas Block Journal Length: 1.13? Muzzle Thread: 1/2-28 TPI Air Gauged Weight: 2.0 lbs Specifications for CMC Triggers 16.25in AR15 Barrel 5.56 Nato 1/7 41V50 CRMOV: Manufacturer: CMC Triggers Additional Features: 1-7in. Twist Length: 16 in CMC Triggers BBL556003 AR Barrel 5.56 NATO 16" Black CMC Triggers CMC-BBL-556-003: 16.25in AR15 Barrel 5.56 Nato 1/7 41V50 CRMOV Black