The PRS2 Extended Rubber Butt-Pad, 0.80" replaces the standard rubber butt-pad, adding approximately 0.50" to the original length of pull. Compatible with PRS2 FN FAL and HK G3/91 models as well as all Bushmaster ACR stocks. Mounts with existing hardware. Made in U.S.A. E.A.R. Export Administration Regulations Controlled Product