Area 419 Universal SA Magazine Extensions 5 Rounds Black 5RD

Area 419 Universal SA Magazine Extensions 5 Rounds Black 5RD. 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. they decided to do it right and cut the attachment rail at an angle to the pocket in the mag. This means that the column of r