RAP4 Barrel Nut Washer

These Outer Barrel Nut Washers are designed to solve most delta ring fitment issues that you may have. If your delta ring does not fit properly then you will have stability issues with your rail and possibly other parts. These washers fit onto your outer barrel and allow your delta ring to properly line up with your gas tube for correct fitment.

Package comes with different sizes: 2mm/1mm/0.15mm/0.1mm

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