Barrel Nut Shim Kit for.223 5.56 and 300 BLK Rifles 16 Pack MFR 15BN Delivers Precise Alignment and Torque, Easy Rail Install, Compatible With Standard Barrel Nuts, Built for Do It Yourself Shooters
✔️ 304 stainless, 16 shims, thicknesses.001-.004 in, fits standard barrel nut
Designed to fine-tune barrel-nut alignment when installing rails on AR-style rifles, this shim kit fits standard barrel nuts and supports.223, 5.56, 300 BLK, and 6.8 SPC barrels.
✅ Inside Diameter 1.005 in
✅ Outside Diameter 1.170 in
✅ Material: 304 Stainless Steel
✅ Pack: 16 shims (4 each of.001,.002,.003,.004 in)
✅ Compatibility: Fits between barrel extension and standard barrel nut
✅ Not compatible with.308 Win or 6.5 Creedmoor barrels or their barrel nuts
💡 What is a barrel nut shim kit and why would I use one in an AR-15 build?
Handy for dialing in alignment and torque for reliable rail installation.
- Fine-tunes spacing between barrel extension and nut
- Lets you reach the precise clearance for a solid mount
- Works with standard barrel nuts on common calibers