Product Description
Included 1 x .003" thick Shim for:
1) Tightening the fit of the STG Buffer-to-Receiver fit.
2) Spacing the Key Plate rearward so it bottoms on the Buffer when the Castle Nut is tightened rather than the Lower Assembly. If the Key Plate tightens on the Lower Assembly, it will misalign the Buffer Tube with the Receiver. The Shim would be placed between the Key Plate and rear of the Buffer.
