The Gen II Tripp CobraMag is the most advanced, well thought out magazine for the 1911 available. It has outstanding design features that include a polished, heat treated stainless steel tube with CNC machined feed lips engineered for the specific caliber. The tube and base design allows a spring with more full-size coils (14 coils of .042") than any other 1911 magazine. This provides a much longer spring life and a stronger, more consistent round lifting force, which is important to the feed timing in a 1911 and is curcial in 1911 pistols that are shorter than a Government Model. The flex follower is an all- stainless steel construction having an anti-tilt design that helps reduce nose diving malfunctions. The stainless steel follower lifts the pistols slide stop, rather than allowing the softer polymer followers used in competing brands to do the work, eventually becoming worn and failing. The welded base features 2 drilled holes for mounting after market bumper pads. The 7R-45-WO magazine will seat flush to the butt of Officer's ACP length pistols. The TR-7R-45-WO will hold 7 rounds of .45 ACP ammo.