Common Barrel Thread Pitches for Silencer Use

Firearm barrel thread pitches are a common questions for us.

Hopefully, this good, but incomplete list of thread pitches will help answer your questions. There are obviously some exceptions. Please let us know if you see any errors and if you have any additions.


Important abbreviations:

M = metric (inches are implied when there is no metric abbreviation)

RH = right hand  (RH is implied when there is no abbreviation)

LH = left hand



12GA


M22x.75 RH (Saiga 12)



.22LR/.22MAG/.17HMR


1/2x28


M8x.75RH (Walther P22, S&W M&P22 (not compact version)



9MM


1/2x28 


1/2x36 (common on AR rifles, Tavor)


M13.5x1


M13.5x1 LH (Sig, Glock, H&K, B&T)


M18x1 (pre 2016 CZ)



.40S&W


5/8x24


9/16x24


M13.5x1 LH (Sig)


M14.5x1 LH (HK, Glock)



.45ACP


.578x28


M14.5x1 LH (HK)


​M16 x1 LH (some HK, Glock)


​M16 x1 RH (some HK)



5.56MM/.223/5.45


1/2x28


M15x1 (HK)


M24x1.5 RH (some AK rifles)


9/16x24 (older Ruger Mini-14)


M13x1 LH (Steyr Aug)


​M13x1 RH (Galil)


9/16x24 (pre 2009 Ruger Mini-14)



7.62MM/.308/.300BLK/.300WM


5/8x24 


M14x1 LH (common on AK rifles)


M15x1 (HK)


M24x1.5 RH (other AK rifles)


.595x32 (Springfield M1A SOCOM)


M13x1 RH (Galil)


5/8x24 (newer IWI Galil Ace)


M18x1 (Sako, Tikka)


M18x1.5 (Accuracy International)



.338LM


5/8x24


M18x1.5 RH (Accuracy International)



.450 Bushmaster


11/16x24 (other variations exist)



.50BMG


1x14 (Armalite, McMillian TAC-50, AR450)


7/8x14 (Barrett, EDM)



6.5 Creedmore


5/8x24




*Accuracy International, SAKO and Desert Tactical Arms utilize non-standard thread pitches. Contact them directly for questions. EU based manufacturers such as Sig Sauer, Glock and HK often utilize metric threads. This list is just a reference and may not be current due to manufacturer changes. Please be sure to contact the manufacturer of your firearm to conform thread pitch.



Page last updated 04/05/2018

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