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It has a 16 inch barrel with a 1:9 twist rate. Stay safe and happy plinking!!

Richard, barrel twist is 1:9, full specs here >>> https://www.del-ton.com/Echo-316L-Optic-Ready-p/orftlw16-0.htm .....Have a great day!

Richard, this rifle has a 16" Lightweight Profile Barrel with M4 Feed Ramps, 1:9 Twist with Threaded Muzzle and A2 Flash Hider with a Manganese Phosphate Barrel Finish. Cheers and stay safe!

1.9 twist see del-ton.com/Echo-316L-Optic-Ready-p/orftlw16-0.htm

This has a 16 inch barrel with 1:9 twist rate. So this should work well with lighter grain ammo. My 1:9 twist does 40-55 grain ammo very well but once I hit around 62 grain ammo accuracy starts decreasing. Hope this helps.