We made this database to build muzzle thread reference over time so users can check what thread they have and purchase the right product. That way it can serve as a reference for quickly locating how your muzzle may be threaded. Remember however, that just because your weapon may be threaded a certain way from the manufacturer – that won’t necessarily apply if you have an after-market barrel or have had the barrel threaded yourself. If you find anything in this chart that may be incorrect, please contact us. Some abbreviations that we’ll use here include:

• M = Metric (for example – M13.5 x 1 LH means that the numbers are metric instead of imperal. 13,5 means that diameter is 13,5mm and pitch of thread is 1mm.)

• I = Imperial (also known as inch ur UN, UTS – Unified thread standard. It uses same 60 degree V angle as metric threads. example 1/2 x 28 TPI means that diameter is half of inch and thread pitch is 28 turns per one inch. The larger TPI number the more fine thread pitch.)

• LH = Left Handed (This means the threads are opposite from what you typically expect. This thread requires counter-clockwise tightening.)

Thread Standards by Caliber

.22 LR, .22 MAG, .17 HMR

The most common standard thread for these calibers is 1/2 x 28.
Sako Quad uses 1/2 x 20

9mm

1/2×28 TPI is the most common thread for 9mm weapons  – both carbine and pistol.
H&K weapons use the M13.5 x 1 LH thread pitch
H&K MP5-N uses the 1/2 x 30 thread pitch
Sig Sauer (ex. MPX) weapons use the M13.5 x 1 LH thread pitch
Glock weapons use the M13.5 x 1 LH thread pitch
Troy uses 1/2 x 36 TPI for their M5 PCC carbine
Colt AR 9mm came with a 1/2 x 36 TPI
Some versions of Diamondback use 1/2 x 28 TPI while their web page has information that thread is 5/8 x 24 TPI
CZ Scorpion EVO carbine length have 1/2 x 28 TPI and those with 8" barrel length models use Metric M18x1 thread
CMMG WASP 9mm barrels have the colt standard 1/2 x 36 TPI
CMMG’s chrome lined 9mms have a 5/8 x 24 TPI thread
Schmeisser AR 15 Sport S and other 9mm variants have M14 x 1
Grand Power Stribog PCC uses M15 x 1 (EU version) or 1/2 x 28 (US version) thread

.40 S&W

9/16 x 24 is the most common thread pitch for .40 cal weapons.
H&K weapons use the M14.5 x 1 LH thread pitch
Glock weapons use M14.5 x 1LH thread pitch
Sig Sauer weapons use the M13.5 x 1 LH thread pitch

.45

.578 x 28 TPI is the most common thread for .45 cal weapons.
Most H&K weapons use the M14.5 x 1 LH thread pitch
H&K USP Tactical uses the M16 x 1 LH thread pitch
H&K Mark 23 (Socom) uses the M16 x 1 thread pitch
KRISS Vector SMG uses the M16 x 1 LH thread pitch
Glock weapons use the M16 x 1 LH thread pitch
Sig Sauer P220 uses the .578” x 28 thread pitch

5.56mm (.223)

AR-15s use the 1/2 x 28 thread pitch
Steyr Aug uses the M13 x 1 LH thread pitch
H&K weapons use the M15 x 1 thread pitch
Ruger Mini uses 9/16 x 24 thread pitch
Most of Oberland Arms AR15 use M14 x 1 thread

6.5mm (.264)

Tikka T3x CTR 6.5 Creedmoor uses 5/8 x 24 thread pitch

7.62mm (.308)

5/8 x 24 is the most common thread for 7.62mm/.308 weapons
Sako TRG uses the M18 x 1 thread pitch
Accuracy International uses the M18 x 1.5 thread pitch
Most AK-47s use the M14 x 1 LH thread pitch
FN SCAR 17 uses 5/8 x 24 thread pitch
The most common thread pitch for eastern European made weapons is M14 x 1 LH

.338LM

5/8 x 24 is the most common thread for .338LM weapons
Sako TRG uses the M18 x 1 thread pitch
Accuracy International uses the M18 x 1.5 thread pitch
Desert Tactical Arms uses the 3/4 x 24 thread pitch
Barrett MRAD uses the 3/4 x 24 thread pitch
Nemo Omen (.300 Win Mag) uses the 5/8 x 24 thread pitch