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Hi Jacob and welcome. Thread Pitch is 1/2 x 28. - Cheers and stay safe!

Jacob, this has a Barrel: 16.25 inch barrel with a 1:10 twist rate and 1/2 x 28 thread pitch. Hope this helps.

Full Specs... Features Compact, folding design Optics-ready Integrated recoil buffer system Reversible magazine catch 30 3/8 in. unfolded length to 16 3/8 in. folded 1/2-28 threaded muzzle with thread protector Flat-face trigger with crisp break Compatible with M&P Pistol double-stack magazines In-stock magazine storage w/quick-release tab system Horizontal folding mechanism with locking latch Horizontal folding design doesn't interfere with top-mounted optics (optics sold separately) M-LOK slots on handguard with Picatinny-style rail on top Charging slide/handle doubles as retainer when folded Carrying bag with additional storage and Velcro straps Backed by Smith & Wesson's Limited Lifetime Service Policy Made in U.S.A.

Jacob, this has a 1/2-28 threaded muzzle with thread protector. Stay safe & have a great day!