Hey folks, I picked up some 1911 mags in a used sale box at Cabela's a few weeks ago and was impressed with the mags that had "shooting Star" stainless followers in them. In the passed I swapped in S&W followers in my K mags to get an extra round to run but they were rather cheesey plastic and these simple spring type followers worked slick as extra round 1911 followers. So I tracked down this guy on Ebay for "look alike" shooting stars in a 5 unit set for 13.95 shipped. They actually are original Shooting Star followers that Midway sells for $19 each! What a gift there.... Any way, To get these to work in a K40 mag the opposite side to the slide stop must be ground back so they fit into the mag body and then only the bottom slide stop plate needs to be shortened at the front end so the follower can ride straight up & down while the back downward end is flat with the back of the mag. Next the last spring coil must be bent around and clipped as in the picture. This keeps the follower from coming out of the mag when empty. Also, just a tiny grind or needle filing on the little spring hook tab so the spring can fit around it nicely. I didn't take final measurements but can do so if any one wants to make the attempt. These are rather ingenious designed followers and make the 6's 7's and 7's 8's with out pinching the casings on a closed slide. These work really slick and don't suffer from possible sluggish movement like the plastic ones when they get really powder fowled.