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- Free Float Quad Rail Barrel Nut Shim Kit 223/556/300BLK
Free Float Quad Rail Barrel Nut Shim Kit 223/556/300BLK
- Maximize ACCURACY by eliminating looseness/slop between barrel and upper receiver.
- Maximize RELIABILITY by eliminating any chance of a malfunction due to loose barrel nut.
- Maximize SAFETY by eliminating any chance of a catastrophic malfunction due to a loose barrel.