Category Archives: General Info

Thread Pitches: 13.5LH vs. 1/2×28

Dear silencer lovers, I am going to clue you in to a little secret; you’re probably not going to like it but hear me out.

When it comes to 9MM thread pitches for handguns the European standard of M13.5×1 (LEFT HAND) LH is superior to the imperial thread pitch of ½-28 TPI. Now is it ten times better? No. Five times better? Probably. Twice as good? Absolutely. Let’s take a walk…