We've compiled a list of the most common barrel thread pitches for pistols and rifles. The most common thread pitch by caliber are marked by an asterisk.
| By Thread Pitch | |
| 1/2-28 |
.22lr Rifle & Pistol 9mm Pistols (Beretta, Glock, Springfield) 5.56 / .223 Rifles (AR-15s) |
| 1/2-36 | 9mm Rifles (AR variants) |
| .578-28 | .45 ACP Pistols (1911, FN, Sig) |
| 9/16-24 RH |
40 S&W Pistols (Beretta, Glock) 5.56 / .223 (AC556, Mini-14) |
| 9/16-24 LH |
5.56 (FN2000/FNC) 7.62 (FAL) |
| 5/8-24 | 7.62 / .30 Rifles (AR-10s, Mini 30, Bolt Actions) |
| .595-32 | 7.62 (M1A. M14) |
| 3/4-20 | .338LM (Barret 98B) |
| 3/4-24 |
7.62 (KAC SR25) .338 (Desert Tactical) |
| M13x1 LH | 5.56 (Steyr Aug) |
| M13x1 RH |
5.56 (Galil) 7.62 (Galil) |
| M13.5x1 LH | 9mm Pistol (HK, M&P, Sig Sauer) |
| M14x1 LH | 7.62 AKs |
| M14.5x1 LH | 40 S&W (HK) |
| M15x1 RH |
5.56 (HK 33, 93) 7.62 (HK 91, G3) |
| M16x1 LH | .45 ACP (HK USP, HK45T, Kriss) |
| M16x1 RH | .45 ACP (HK Mark 23) |
| M18x1 RH | 7.62 / .30 (Blaser, Sako, Tikka) |
| M18x1.5 RH | 7.62 / .30 (Accuracy Intl) |
| 10x1mm | FN Five-Seven (adapters available) |
| By Caliber | |
| 22LR / Rimfire | 1/2-28 * |
| Pistol |
5.7x28mm :: 10x1mm 9mm :: 1/2x28 * 9mm :: 1/2-36 (AR-15) 9mm :: M13.5x1 (HK, M&P, Sig Sauer) 40S&W :: 9/16-24 * 40S&W :: M14.5x1 LH (HK) 45ACP :: .578-28 * 45ACP :: M16x1 LH (HK USP, HK45T, Kriss) 45ACP :: M16xx1 RH (HK Mark 23) |
| 5.56mm / .223 |
1/2-28 * (AR-15) 9/16-24 LH (FN2000/FNC) 9/16-24 RH (ACC556, Mini-14) M13x1 LH (Steyr Aug) M13x1 RH (Galil) M15x1 RH (HK) |
| 7.62mm / .308 |
5/8-24 * (AR-10, Bolt Actions) .595-32 (M1A/M14) 3/4-24 (KAC SR25) M13x1 RH (Galil) M14x1 LH (AK) M15x1 RH (HK) M18x1 RH (Blaser, Sako, Tika) M18x1.5 RH (AI) |
| .338+ |
5/8-24 * 3/4x20 (Barret 98B) 3/4-24 (Desert Tactical) M18x1 RH (Sako, Tikka) M18x1.5 RH (Accuracy International) |
