Tools to help you order the right part the first time – fitment guides, calculators, and reference charts.

AK Build Bench · Beta

What’s your thread pitch?

Pick your platform on the left. We’ll show the muzzle thread spec, which direction it tightens, and what it’s compatible with — before you order the wrong adapter.

No platform selected

Choose one from the list to see its thread spec.

Verify before you buy

Manufacturers change threading between production runs, especially on imported AK-pattern rifles. If you don’t trust the spec sheet, count it yourself. This trick only works for standard inch threads (1/2×28, 5/8×24, and so on) — AK-pattern metric threads like M14×1 or M24×1.5 won’t produce a match below, since they’re not measured in TPI at all. For those, check the AK sections above or measure diameter and pitch with a caliper.

Mark a full 1-inch section of exposed threading near the muzzle.
Count every crest (peak) inside that inch — not the valleys.
Drag the slider to match your count.

Crests counted in that inch

Muzzle thread pitch chart

Every platform in the finder above, in one table. These are the common factory specs; confirm against your exact rifle or barrel before ordering.

AR-Pattern Rifles

Platform	Thread	Direction	Notes
AR-15 (.223/5.56, up to .243)	1/2" × 28 TPI	Right-hand (RH)	The default AR muzzle thread in the US. Also common on many .22 LR uppers.
AR-15 (.300 BLK)	5/8" × 24 TPI	Right-hand (RH)	Some .300 BLK pistols ship 1/2×28 — check your barrel, not just the caliber.
AR-10 / .308 / 6.5 CM (up to .300 Win Mag)	5/8" × 24 TPI	Right-hand (RH)	A handful of AR-10 makers use 9/16×24 instead — verify before ordering a direct-thread mount.
AR-15 9mm Carbine (Colt-pattern)	1/2" × 36 TPI	Right-hand (RH)	Non-standard pitch. Direct-thread suppressors for 5.56 will not fit without an adapter.
Big bore (beyond .300 Win Mag)	5/8" × 32 TPI	Right-hand (RH)

AK-Pattern Rifles

Platform	Thread	Direction	Notes
AK-47 / AKM (7.62×39, 5.45×39 standard)	M14 × 1	Left-hand (LH)	Left-hand thread — most US-pattern suppressor mounts need an LH-to-RH adapter.
AK-74 / AK-100 series	M24 × 1.5	Right-hand (RH)	Right-hand on the 100-series, unlike the classic AKM — easy to assume wrong.
SKS (sporterized, 7.62×39)	M14 × 1	Left-hand (LH)	Same family as AKM. Confirm your specific rebuild — aftermarket threading varies.

AK-Pattern — By Brand

Platform	Thread	Direction	Notes
PSA AKM-pattern (GF3 / GF5, 7.62×39 & 5.45×39)	M14 × 1	Left-hand (LH)	PSA’s stamped-receiver AKs follow the traditional Soviet-pattern thread.
PSA AK-100 series (AK-104 / AK-105, GF4)	M24 × 1.5	Right-hand (RH)	PSA moved its own 100-series to the modern RH pitch — don’t assume it matches their 47-pattern rifles.
PSA AK-V (9mm) / AK-556 (5.56)	1/2" × 28 TPI	Right-hand (RH)	Breaks from AK convention entirely and shares the AR/pistol ecosystem instead.
Zastava ZPAP M70 / ZPAP92 (7.62×39)	M14 × 1	Left-hand (LH)	Consistent Soviet-pattern thread across Zastava’s stamped-receiver lineup.
Century Arms VSKA (US-made, 7.62×39)	M14 × 1	Left-hand (LH)	Built to the standard AKM pattern.
Century Arms WASR-10/63 (Romanian import)	M14 × 1	Left-hand (LH)	Romanian imports have a well-documented history of oddball, inconsistent threading — some units don’t match standard 14×1 LH at all. Verify with a gauge before ordering anything.
Arsenal SAM7 series (Bulgarian, 7.62×39)	M14 × 1	Left-hand (LH)	Bulgarian-made and built tight to Soviet spec.
Kalashnikov USA KR-103 (US-made, 100-series pattern)	M24 × 1.5	Right-hand (RH)	Same modern pitch as PSA’s 100-series — not the classic AKM thread.
Kalashnikov USA KP-9 (9mm pistol)	1/2" × 28 TPI	Right-hand (RH)	Shares the AR/PCC ecosystem rather than AK convention.

Pistols

Platform	Thread	Direction	Notes
9mm (US-pattern: Glock, M&P, etc.)	1/2" × 28 TPI	Right-hand (RH)
.40 S&W	9/16" × 24 TPI	Right-hand (RH)	Some models use 5/8×24 or .578×28 instead — barrel-specific.
.45 ACP / 10mm	.578" × 28 TPI	Right-hand (RH)
European-pattern (Glock/Sig/H&K threaded models)	M13.5 × 1	Left-hand (LH)	Common on EU-market pistols. Needs an adapter for US suppressor mounts.

PCC & Subguns

Platform	Thread	Direction	Notes
9mm PCC (Colt-pattern: CMMG, Troy, etc.)	1/2" × 36 TPI	Right-hand (RH)
9mm PCC (CZ Scorpion, Diamondback)	1/2" × 28 TPI	Right-hand (RH)
MP5-pattern (SP5, Zenith, PTR, Century AP5, etc.)	1/2" × 28 TPI	Right-hand (RH)	Same as the AR-15/9mm standard — not a special MP5 pitch. Civilian semi-auto clones (Zenith, PTR, Century, MKE) all thread 1/2×28; the rare military MP5-N is reported at 1/2×30, so double-check if you have one of those.

Bolt-Action & Battle Rifles

Platform	Thread	Direction	Notes
.30-cal bolt-action (Remington 700, Tikka, Savage, etc.)	5/8" × 24 TPI	Right-hand (RH)	Most aftermarket-threaded bolt-action rifles from .243 Win up through .300 Win Mag land here — same as the AR-10/.308 standard.
M1A / M14 (factory barrel)	.595" × 32 TPI	Right-hand (RH)	A proprietary pitch, not a standard thread — Springfield confirms all their M1A barrels ship this way. You need a step-up adapter (commonly to 5/8×24) before any standard muzzle device or suppressor will fit.
FN FAL (.308)	9/16" × 24 TPI	Left-hand (LH)	Standard FAL threading is left-hand — the reverse of most .30-cal rifles. Needs an LH-to-RH adapter (commonly to 5/8×24) for standard devices.
FN SCAR 17	5/8" × 24 TPI	Right-hand (RH)

Rimfire

Platform	Thread	Direction	Notes
.22 LR (most threaded barrels)	1/2" × 28 TPI	Right-hand (RH)	Shares a pitch with 5.56, but a .22 bore should only run a rated .22 suppressor.

Airsoft

Platform	Thread	Direction	Notes
AEG & GBB Rifles (standard)	14mm CCW	Left-hand (LH)	Pitch is 1mm (M14×1) either way — only the direction changes between platforms.
AEG Exceptions (CW platforms)	14mm CW	Right-hand (RH)	G&P Armalite-pattern AEGs, MP5/MP40-style GBBs, and M14-pattern rifles commonly run this way — always check before ordering.
GBB Pistols (WE / AW / Marui-pattern)	11mm CW (internal)	Right-hand (RH)	Most GBB pistol platforms (WE, Armorer Works, VFC, G-series, Hi-Capa/1911 clones) need an 11mm-to-14mm CCW step-up adapter before mock suppressors or tracers will fit.