Pearce Grips specializes in designing and manufacturing innovative grips and magazine extensions right here in the USA. Their products are sought after world wide because of their functionality and rugged dependability. Their product line includes the grips you need for virtually all modern firearms including Ar-15's, and Ak-47's. In an age when things are mass produced over seas, it is nice to know that Pearce Grips products are manufactured in the USA. Keeps debris out of the magazine well Holds in place with friction and precise fitting. Polymer. Fits:GLOCK 26, 27, 33, 39. Will NOT fit Gen 4 Glocks due to replaceable backstraps.