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30 Caliber (.308)
Silver
Silver
Steel
.837
AR-15,
AR .308
Product no.: 100005379
Mfr. No.: 5MDAS301
Hardened steel shims ensure precise fit and correct alignment of flash suppressors, muzzle brakes, and compensators. Large (thick) shim allows 90° of rotation and can be used as a spacer for barrels not having a relief cut behind the threads. Medium shims add approximately 45° of rotation. Small shims used with large and medium shims provide smaller degrees of rotation for finely-tuned, critical alignment.Delivery time approx. 7-14 days.
The AR-308 .308 Shim Kit from PRIMARY WEAPONS is designed for those who demand accuracy and reliability in their firearm setups. This shim set is essential for achieving the perfect fit and alignment of flash suppressors, muzzle brakes, and compensators.
Upgrade your firearm's performance with the AR-308 .308 Shim Kit and experience the difference in precision shooting.
30 Caliber (.308)
Silver
Silver
Steel
.837
AR-15,
AR .308
Inexpensive, answer to 'clocking' brakes 10/01/2015
Replaced a factory attached brake with an aftermarket counterpart (M11 American Defense). Had a nice selection of sizes, but could have used one or two additional wafer-thin pieces.
The ID was perfect for the threads; the OD was very close to the barrel spec OD. There was however a tiny bit of OD size difference between the thin shims and the main 'spacer' style shim which made installation a bit touchy to get it symmetrical.
The set placed me just short of ideal, requiring me to 'plane' the main spacer (120 grit on plate glass) to shave off enough material to get an exact line-up at 12 o'clock. Simple, but a bit time consuming. The shims are bright steel, so they are quite noticeable, but, actually attractive as they set-off the brake.
Allowed proper position with crushwasher 01/02/2014
This shim set allowed for the correct timing (positioning)and tensioning of a A2 FS on my precison rifle using a crush washer.
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