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Hi Patrick The 16.1" Barrel has a 1:7" Twist Rate

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1:7 twist according to the manufacturer's website. https://www.cmmginc.com/product/barrel-sub-assm-16-1-mt-4140cm-sbn-5-56mm/#

Hi Patrick, The Barrel has a 1:7" Twist Rate---Features and Specifications:--- Manufacturer Number: 55DC70A --- 5.56mm NATO (Accepts .223 Remington)--- >>>>>>>> 1:7" Twist Rate--- 16.1" Barrel Length--- Medium Taper Profile--- Mid-Length Gas Port Location--- .750" Gas Block Size--- 4140 Chrome-Moly Salt Bath Nitride Finish--- Muzzle Threaded 1/2" x 28 TPI--- Black

Please click the green box stating it as the best answer. We are rated on our answers and are just volunteers, not Buds employees. You can choose more then one Thank you!

The Barrel has a 1:7" Twist Rate---Features and Specifications:--- Manufacturer Number: 55DC70A --- 5.56mm NATO (Accepts .223 Remington)--- >>>>>>>> 1:7" Twist Rate--- 16.1" Barrel Length--- Medium Taper Profile--- Mid-Length Gas Port Location--- .750" Gas Block Size--- 4140 Chrome-Moly Salt Bath Nitride Finish--- Muzzle Threaded 1/2" x 28 TPI---