Redlines 202 Posted August 19, 2016 A standard AR mag fits 10 458 socom bullets, does that then make it a 10 round mag ? If the mag is marked for 458 socom is it NJ legal? Always wondered about this. Quote Share this post Link to post Share on other sites
GRIZ 3,365 Posted August 19, 2016 I would think it legal. However, someone will chime in you would have to get rid of your 5.56 ARs. Quote Share this post Link to post Share on other sites
PK90 3,569 Posted August 19, 2016 Change the follower and stamped the mag. Sent from an undisclosed location via Tapatalk. Quote Share this post Link to post Share on other sites
n4p226r 105 Posted August 19, 2016 I purchased a 458 socom mag with the red follower and can confirm that you cannot load 5.56 into it and have it feed reliably. I may try to make them myself and put these on the bottom. http://parallaxtactical.com/products/pxt-458-socom-floorplate I'm not a huge fan of the extra large engraving on the side. Quote Share this post Link to post Share on other sites