Franklin Armory's DFM magazine fits your AR15 and requires disassembly of the action to remove the magazine.The DFM is designed to be used with a magazine catch. This prevents the tabs from resting on the lower receiver. If the magazine is allowed to reside below the magazine catch, the tabs may mark the lower receiver. In addition, the feed lips of the DFM will likely sit too low for proper functioning. Features: Easily converts any AR into a 10 round, fixed magazine design Requires disassembly of the action to remove the magazine Suitable for use with rifles featuring banned features California compliant Connecticut compliant New York safe act compliant Limiting tabs prevent release through the bottom of magazine well Can only be removed from the top when the upper is tilted out of the way