m113103 wrote:I had a stock 556 stoner mag and found on u-tube someone that used a 1/2 " sanding drum on a dremel. He sanded a grove straight down the middle. Tried it on a mag and it works well for the 450 but ruined it for the 556. The only problem for me is it now is a 9 rounder. Have to crimp the mag capacity somehow.
back in the olden days we did things similar to that to get away from the high priced BM mags. Filled bottom of follower with JB Weld, then run a 1/2" ball nose end mill thru the top. Probably some pics archived someplace on it.
pop rivet on the front or back of the mag at a given place will limit your mag capacity. The Stoners Midway was clearing out on the cheap were 20rd bodies with dimples to limit it to 5rd.