Samuel from United States, CO Public Profile

The fit is close, but this ambi mag release doesn't impede on a Geissele Maritime Bolt Catch in any combination of either one pressed or depressed.

Unlike the Troy ambidextrous mag release (which also works with the Maritime Bolt Catch), this doesn't mar the side of the lower in an odd location, and presents the left-side release button in a mirrored location to the standard right-side button. As the Troy button is forward and lower, rather than mirrored; the Troy is good for separating the mag release from the bolt controls, but in a non-standard location that doesn't look or feel as natural.

While this CMMG ambi release doesn't stand out much aesthetically on a mil-spec lower, it does protrude slightly further on the right side vs a standard mag release button. It also has a small protrusion on both sides that could catch on gear, potentially increasing the chances of an accidental mag drop. When paired with a Maritime Bolt Catch, bolt lock and mag release buttons are very close to each other, and could be confused in a high stress situation. Often, locking back the bolt will be followed by a mag release or no magazine will be present, so this is possibly not a huge issue.

There are pros and cons as with everything, but this is one of the best options for a mirrored ambidextrous magazine release that is also compatible with the Geissele Maritime Bolt Catch.