AccuWasher Gen 2 Shim Adapter
The Shim Adapter extends the AccuWasher Gen 2 Muzzle Device Alignment System to barrels and muzzle devices where the standard shim diameter would leave a visible step. It sits between the barrel shoulder and a larger-diameter AccuWasher shim, centring the shim on a smaller thread so the shim’s outside edge lines up with the muzzle device body. The result is the same exact, repeatable timing as the standard kit, with a cleaner, professional appearance that ordinary shims cannot match.
Each pack contains three adapters, all 0.035″ thick, so the adapter’s own thickness is easy to account for when selecting the timing shim.
Benefits
- Universal compatibility: works with nearly all standard thread diameters and pitches up to 3/4″.
- Metric compatibility: supports nearly all metric thread diameters and pitches up to 18 mm.
- Bull-barrel ready: pairs with the large-diameter AccuWasher kits made for popular bull-barrel thread sizes.
- Sleek, seamless finish: matches the shim diameter to the muzzle device for a flush, factory look.
- Three per pack: spares for multiple rifles or repeat installations.
Choosing the right adapter
Pick the adapter by your barrel thread and by the AccuWasher shim diameter you want to run. The .825″ adapter (AW625 series) fits 1/2″, 9/16″ and M15x1 threads; the .925″ adapter (AW750 series) fits 1/2″, 5/8″, 9/16″, 11/16″, M15x1 and M18x1 threads. The four variants offered here cover the most common combinations: 1/2″ to .825″, 1/2″ to .925″, 15 mm to .825″ and 5/8″ to .925″.
Specifications
| Type | Shim adapter for the AccuWasher Gen 2 system |
|---|---|
| Thickness | 0.035″ |
| Pack size | 3 adapters |
| AW625 – 1/2″ to .825″ | For 1/2″ threads with .825″ OD shims |
| AW750 – 1/2″ to .925″ | For 1/2″ threads with .925″ OD shims |
| AW625 – 15 mm to .825″ | For M15x1 threads with .825″ OD shims |
| AW750 – 5/8″ to .925″ | For 5/8″ threads with .925″ OD shims |
| Compatibility | Any brand of muzzle device; standard threads up to 3/4″, metric up to 18 mm |
| Manufacturer | Precision Armament, USA |
































