![]() ![]() M- Metric (for example – M13.5×1 LH means that the numbers are metric instead of standard.)Ĭomplete Thread Pitch Guide Thread Pitch Guide for Handguns.If there is no LH or RH designation – RH is the default.) RH- Right Hand (as an example – M16x1RH means the threads work how you typically expect (righty-tighty…).This thread pitch would require righty-loosey, lefty-tighty…) LH- Left Hand (as an example – M13.5×1 LH means the threads are backward from what you typically expect.These are more common for handguns, not rifles… What do the threading abbreviations mean? Thread Pitch Guide for Pistol Caliber Carbinesīarrel Threading Common Questions.Metric threading is listed as left-handed or right-handed metric (LHM, RHM). Unless otherwise stated, thread pitch is presented in inches with a right-hand thread pitch. This factory-supplied data should help you in developing a collection of end caps and adapters to allow you to use your suppressor on as many different guns as possible. We’ve prepared a list of the thread pitches on many popular and common handguns and rifles. While there are a few popular thread pitches that are close to “standard” due to military use, or common use on popular suppressor brands, expect that if you buy a gun with a factory threaded barrel, and a silencer, sometimes the two might not match up. No, instead we are faced with a host of different thread pitches, and a collection of adapters to allow fitting different silencers to different guns. While things were a bit easier in the days of the old Maxim silencer as there was really only one model to use, and just a couple thread pitches, we can no longer simply say ‘ thread my barrel’ and expect the correct caliber silencer to fit. From the invention of the first silencer to the present day, people have sometimes struggled to attach their silencers to their guns.
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