The GSR-03 adds subtle, but tractable serrated wings at the slide's end, to guarantee a positive cycling of ammunition into the weapon. No matter how adverse the conditions, or how tough the fight, you can always rely on the GSR-03 to keep your weapon up and running. Even if you're down to one hand, cycling the slide against your belt, holster or heel is quick and positive. Small or arthritic hands will find it much easier to use than the traditional 'slingshot' method. The GSR-03 is big enough to offer advantage, yet small enough to be unnoticeable in concealed carry holsters. The GSR-03 is a top quality drop-in part, requiring no other modifications to the fi Mfg: Tangodown