Area 419 Plus 4 Magazine Extension for ARC, AICS Olive

The Area 419 universal mag extensions are designed to work on a variety of magazines from the ARC 10rd mag to AICS 5 or 10rd and Accurate Mag in either standard bolt face or on SAUM/WSM mags. They are NOT COMPATIBLE with AI AW magazines, as those have a fixed/welded floorplate. 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. Area 419 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 rounds travels straight down into the extension. The fluting around the sides make an excellent gripping point for mag changes and also helps to remove some weight. Note: These do not work with Magpul or other polymer magazines