Forward Controls Design OPF Optics Platform For Sig Sauer M17 - ACRO w/ Rear Sight Dovetail

Machined in 4140 steel and black oxide coated, OPF-M17, ACRO, RSD is a new member of their OPF (Optics Platform, Forward Controls) line. Forward Controls Design again eschew aluminum for this application, and continue to use steel as other OPF plates, they prefer steel plates for steel screws. 4140 steel costs more and takes longer to machine, they use it extensively on other products. Forward Controls Design do not deem light weight to be of particular use in this application, but consider reliability and durability far more useful and important qualities. OPF-M17, ACRO, RSD is a drop in adapter for superb Aimpoint ACRO sights. The removal of the P320, M17/M18 sight plate cover isn't as straight forward as the Glock MOS. Forward Controls Design will stress the importance of holding the LCI (loaded chamber indicator) with your finger or a piece of tape while removing the plate from the slide, the LCI spring is very small and fragile, and easily damaged. No need to make this avoidable $