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Yes, 1/2x28 under the flash hider

Hi Mark and welcome. Yes, this model has a 16.5" Cold hammer forged chrome-moly vanadium chrome lined barrel with Right hand, 6 groove, 1:8" twist rifling and threaded 1/2x28 tpi. Cheers, stay safe and enjoy!

Hi Mark, the 16.5" Cold hammer forged chrome-moly vanadium chrome lined barrel has a twist rate of 1:8 and is threaded 1/2 x 28 Stay safe & have a great day!