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Richard, this rifle has a 1:8" twist rate.

Hi Richard, The 16" Lightweight Profile CMV barrel with Melonite finish has a 1:8" twist rate.

!:8 twist Specifications and Features Springfield Armory SAINT Edge AR-15 Semi Auto Rifle STE916556B 5.56 NATO (also accepts .223 Remington) Mid-Length Gas System 16" Lightweight Profile CMV barrel with Melonite finish 1:8" twist 30 rounds capacity Magpul PMAG magazine 7075-T6 upper and lower receivers Mil-STD-1913 Picatinny Rail M4 Feed Ramps Low Profile Multi/Mode Adjustable Gas Block Accu-Tite receiver mating system Springfield low profile flip up rear dual aperture sight; 1/2 MOA Windage adjustment Springfield Flip Up Front Sight; 1/2 MOA Elevation adjustment Springfield Armory Unique Proprietary Patent-Pending Full Length Aluminum Free Float Hand Guard (SA Locking Tabs) M-LOK compatible Bravo Company Mod 3 Pistol Grip Bravo Company Mod 0 SOPMOD Stock Mil-Spec receiver extension GI Charging Handle Springfield Armory Proprietary Modular Match Short Reset Single Stage Trigger Integral Trigger Guard Carbine H Heavy Tungsten Buffer MIL-SPEC Dimension Carbine Receiver Extension Springf