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Hey Ben! With the nightingale mags they fit inside the Firerat and surprisingly it works. Although downside is that when the mag is in the firerat. It's prone to fall out since it's not specifically designed for use in the Firerat. I've tried using it for plinking but I've noticed with a slight bump or even during play it'll fall out since the fit is not perfect. But it's definitely possible to make it work with a 3D-printed attachment I'm currently working on! I'll try loop back when I get it working :)