Upgrade your backplate fasteners with Torx drive pattern ones. These will be a lot harder to strip at the head and cause major headaches when attempting a repair. The kit also addresses and helps mitigate the concern with the backplate holding your butt-stock from shifting back and eventually separating from your upper receiver because now you can add more clamping force to your screws without concern about removal. Smaller M4 pairs of screws are now same length 6mm, we phased out the longer ejection side screws from previous offering of this kit.
- Torx-pattern screws are more difficult to strip than the OEM hex
- Use your favorite flavor of thread locker (Loctite 242)