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Hi Curtis, Twist Rate: 1:7 Full specs here >>> https://www.radicalfirearms.com/product-p/fr16-5.56soc-15rpr-mft.htm Stay safe and have a great day!

Hi Curtis and welcome. Barrel twist ratio is 1 in 7 inches. Specifications here: Barrel Length: 16" Barrel Material: 4140 Chrome Moly Vanadium Barrel Finish: Melonite Barrel Profile: SOCOM Barrel Thread Pitch: 1/2x28 Chamber: 5.56mm Twist Rate: 1:7 Barrel Extension: M4 Feed Ramps Gas System: Mid Length Gas Block Type: .750 Low Profile Gas Block Muzzle Device: A2 Flash Hider -------- Cheers, stay safe and enjoy!