Ask the Community

sorry I could not find a listing of the threads size I suggest you ask Steyr 205-417-8644 email: support-usa@steyr-arms.com

Hi Jason and welcome. The Steyr Arms AUG STG-77 M1 .223 barrel has a thread pitch of 1/2" x 28 TPI. Cheers and stay safe!

Hi Jason, it is most likely 1/2 x 28, but could be M13x1LH threads if it is an older model. A few years back, Steyr USA switched to 1/2x28 on newer runs to better align with the US marketplace. Stay safe & have a great day!

Has a thread pitch of 1/2" x 28 TPI.