The SMG (Sub Machine Gun) insert allows you to carry up to 5 magazines in your Maximus Placard. This insert allows most size magazines to be inserted from a smaller MP5 (9mm) style magazine up to larger HK UMP (45ACP) style magazine. The inserts are elastic and if your magazine is similar in size to the ones pictured, it will probably work.
NOTE: Only works with Maximus Placard System
