Pearce Grip Grip Frame Insert for Glock 20SF/21SF Pistols - PG-FI20SF

These units fit in the bottom rear cavity of a Glock M20 and M21 short frame utilizing a friction fit to secure it to the frame. These grip frame inserts will not fit a Gen-4 frame nor a standard Glock M20 or M21 frame.Features:Helps keep debris out of the magazine well