Built for 5.56mm/.223 AR platforms with 1/2-28 threading, this AAC shim kit takes the guesswork out of timing a muzzle brake or flash hider. Six color-coded shims in graduated thicknesses can be combined to achieve the exact spacing needed for proper device alignment, offering faster, more precise results than crush washers.
- Caliber : 5.56mm / .223
- Thread Pitch : 1/2-28
- Outside Diameter : .750"
- Inside Diameter : .500"
- Kit Contents : 6 shims, assorted thicknesses, color-coded
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