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Anyone who has fought a crush washer trying to clock a brake or flash hider knows the frustration. You crank down, overshoot, back off, start over, and still end up with the ports pointed slightly off. The Precision Armament AccuWasher Gen 2 Shim Kit in 5/8×24 takes that whole battle off the table. Instead of a stack of thin peel shims or a crush washer you can only use once, you get a set of individually marked precision shims and pick the single one that lands your muzzle device exactly where it needs to sit.
This is the AW625 size kit with a 0.825 inch outside diameter, built around 5/8-24 threads to cover the most common .30 caliber and larger muzzle devices. Each shim is lathe-turned on both faces to a guaranteed thickness uniformity of 0.0001 inch, so you are getting true, flat contact against the barrel shoulder rather than the uneven squish of a crush washer. One shim does the job, which means no tolerance stack-up and no need to lean on excessive torque to force alignment.
The system is refreshingly simple to use. You thread your device on hand tight, check how far off it sits, then use the included timing chart to find the shim number that corrects the gap. Every shim is laser-marked with a pattern of thick and thin dashes so you can read its value at a glance. Thread on the correct shim, torque the device, and your brake or hider lands clocked and secure. The shims are chamfered on one side to clear barrels with radiused thread shoulders, so they seat cleanly across a range of profiles.
Machined from high-strength 400 series stainless steel with a matte oxide-blasted finish, these shims hold up to hard front and side impacts without deforming the way flimsier shims can. The single monolithic design resists bending under heavy loads, and because the kit is reusable, one set will index around nine muzzle devices before you need replenishment shims. Whether you are mounting a muzzle brake, a flash hider, or setting up a suppressor host, this is the clean, repeatable way to get it right.
This kit fits any brand of muzzle device with 5/8-24 threads, which covers most .30 caliber and larger brakes, flash hiders, and suppressor mounts. The 0.825 inch outside diameter matches standard muzzle device shoulders in this thread pitch. If your device uses a different thread or needs a different OD, Precision Armament offers other AccuWasher sizes.
A crush washer deforms as you torque it, so you only get one shot and timing is largely guesswork. The AccuWasher Gen 2 is a precision-machined single shim that you select by thickness to land your device exactly where you want it. Because nothing crushes, your alignment is repeatable and the shims are reusable.
Thread your muzzle device on hand tight and check how far it sits from aligned, then use the included timing chart to find the shim number that closes the gap. Each shim is laser-marked with thick and thin dashes to indicate its value, so it is easy to read. Keep in mind the device will typically rotate an additional 10 to 30 degrees from hand tight once you torque it down.
On average, one kit will index around nine muzzle devices since you only use a single shim per installation. The shims are machined from high-strength stainless steel and are reusable. If you run through a particular thickness, Precision Armament sells individual replenishment shims.
| UPC | 810112081275 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | A00520 |
| Color | STAINLESS STEEL |
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