- New Barrel Nut Shim Kit For Free Float Handguard/Quad Rail
- Peel Washers Fit Between The Barrel Nut And Upper Receiver
- Does Not Work With .308 Cal
- 5 Pcs In The Kit
- Use Up To 5 Peel Washers To Reach Proper Alignment
- Helps Improve Torque, Timing, Indexing, Alignment Of Barrel Nut
- Works With .223/5.56/300 AAC Blackout
Joe –