RA-TECH Outer Barrel Nut Washers 5pc

Convenient set of 5 barrel shims for M4 style AEG and GBB rifles
These washers will ensure a contour fit between barrel nut and upper receiver, eliminating misalignment and rail instability.

Features:
- Eliminate gap between rail and upper receiver
- Precisely aligns fastening screws on RIS systems
- Ensures stability
- Prevents RIS from angling during installation