Quietbore.com

Thread Pitch Guide

Selecting the right thread pitch for your firearm can be confusing. We have compiled a list of the most popular suppressed firearms in the market and documented their thread pitches for you! Scroll down to check out the full list.

Handguns

After Market Barrels (most common)
.22 – 1/2×28
9mm – 1/2×28
.40 S&W – 9/16×24
45 ACP – .578×28  

Beretta
9mm – 1/2×28

B&T
9mm – 13.5×1 LHM

CZ
9mm – 1/2×28

FNH
9mm – 1/2×28
45 ACP – .578×28

Glock
9mm – 13.5×1 LHM
.40 S&W – 14.5×1 LHM
45 ACP – 16×1 LHM

H&K
9mm – 13.5×1 LHM
.40 S&W – 14.5×1 LHM
45 ACP – 16×1 LHM (HK23 – 16×1 RHM)

Ruger
.22 – 1/2×28

Smith & Wesson
.22 – 1/2×28
9mm – 1/2×28
45 ACP – .578×28

Sig Sauer
9mm – 13.5×1 LHM
45 ACP – .578×28

Sphinx
9mm – 13.5×1 LHM

Styer Arms
9mm – 1/2×28 or 13.5xl LHM

Pistol Caliber Carbines / Sub Guns

Angstadt Arms
9mm – 1/2×36
.40 S&W – 5/8×24
45 ACP – .578×28

CMMG
5.7×28 – 1/2×28
9mm – 1/2×36 or 1/28×28
.40 S&W – .578×28
45 ACP – .578×28

Colt
9mm – 1/2×36

CZ
9mm – 18×1 (pre 2016)
9mm – 1/2×28

IWI
9mm – 1/2×36

Kel Tec
9mm – 1/2×28
.40 S&W – 9/16×24

LWRC
45 ACP – .578×28

MP5 Variants
9mm – 1/2×28 or 3 Lug

Ruger
9mm – 1/2×28

Sig Sauer
9mm – 13.5×1 LHM

Quarter Circle 10
9mm – 1/2×28
.40 S&W – 5/8×24 or .578×28
10mm – .578×28
45 ACP – .578×28

Rifles

Common thread pitches per caliber
5.56 – 1/2×28
.30 cal – 5/8×24

Common thread pitches for AR variants
5.56 – 1/2×28
300BLK – 5/8×24
.30 cal – 5/8×24

Accuracy International
.30 – 18×1.5M or 5/8×24

CMMG
350 Legend – 1/2×28

CZ
557 UCS – 5/8×24
750 Sniper – 18×1
Bren S1 – 1/2×28

Desert Tech
.30 cal – 3/4×24 or 5/8×24

FNH
FN 15 – 1/2×28
SCAR 16 – 1/2×28
SCAR 17 – 5/8×24* SCAR17 R3 Flash Hider
SCAR 20S – 5/8×24* SCAR17 R3 Flash Hider 

H&K
MR556A1 – 1/2×28
MR762A1 – 15×1
HK91 – 15×1

IWI
5.56 – 1/2×28
300BLK – 5/8×24*  SCAR17 R3 Flash Hider 

Knight Armament Company
SR25 – 3/4×24

Rock River Arms
350 Legend – 1/2×36

Ruger
Mini 14 – 9/16×24 (pre 2009)
350 Legend – 1/2×28
450 Bushmaster – 11/16×24 (Fixed Mount for the Obsidian45)

Sako
.30 cal – 18×1

Tikka
T3x – 5/8×24
T3 Compact Tac – 5/8×24
T3 TAC – 18×1

Winchester
350 Legend – 11/16×24