The C&H Precision Pistol Red Dot Adapter Plate is the most modular, rugged, durable, reliable and most widely used aftermarket optics adapter plate. The Red Dot Adapter Plate features a patented stainless steel T-Nut which provide an industry leading six to seven threads of engagement.Note: Filler plates are approximately .046" thickFeaturesV4 MIL /LEO plates are .095a ^2 to .099a ^2 thickMachined from 6061 aluminumStainless steel mounting hardwareReplaceable 416 stainless steel T-posts for maximum thread engagement DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.