New barrel nut shim for free float handguard/quad rail. Helps improve torque, timing, indexing, alignment of barrel nut This0.32mm stainless steel shim fits between the barrel nut and upper receiver Works with .223/5.56/300 AAC Blackout Does not work with .308 Cal Package Contents: Guntec USA AR-15 Free Floating Handguard Barrel Nut Shim
1 review for Guntec USA AR-15 Free Floating Handguard Barrel Nut Shim
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Billy Bob –
I wanted to add an Aero Precision handgaurd to my Just right Carbine, but due to the design, I had to back the barrel nut up enough to get the handgaurd to slide down and time the thread holes. I bought 4 packs of shims, but still wasn't there. I really wanted a thicker shim and this is what I found. I was able to go from 17 shims to 4 and am very happy.