Area 419 Universal SA Magazine Extension Blue for ARC and AICS Magazines 4/rd

In Area419's opinion these are the only correctly made mag extensions on the market. Other magazine extensions on the market are simply rectangular blocks. If you look at your magazine the bottom is angled so when you attach a competitors extension it is not parallel with the column of cartridges in the magazine. This probably works fine for +2 rounds but it would not work for much if any more. Area419 decided to do it right and cut the attachment rail at an angle to the pocket in the mag. This