I needed a couple more M4 mid-cap magazines. So when I visited Evike's Airsoftcon 2013, I picked up two G&P Mid-Cap M4 Magazines. Surprisingly, the Evike salesperson handed me two mags in plastic bags. There was no other packaging material that showed any kind of branding nor marketing.
The magazines are made out of metal. The only plastic part is the top BB feeder (see photo above). It's about the same size compared to most standard magazines for the M4. It is not entirely black color, but, rather, have a brownish tint to it. It's semi-gloss surface also reflect more lights (see photo below) than other matte black mags I've used.
This mid-cap mag has no winding wheel. In addition, BB's doesn't rattle in the magazine. Both of these benefits means that magazine is more realistic than a typical high-cap airsoft magazine. In addition, it makes you stealthier on the battlefield. You can make this magazine even more realistic by loading only 30 rounds in the magazine.
Unlike a high-cap magazine where you can pour BB's into a large hole, the only way to load this magazine is to use to speedloader. That's pretty typical of an airsoft magazine that doesn't rattle. The loading hole has a switch that lets you unload all of the BB's in the magazine quickly. The switch is rather easy to use.
Straight out of the bags, the magazines seems to be slightly larger than other M4 magazines I've used. That observation comes from inserting the magazine into the ASP ASR107 M4 URX Raptor AEG. But after inserting it a few times, it has loosened slightly, but is still snug.
The bottom of the magazine has a hex screw (see photo below). Unscrewing this hex screw allows you to disassemble the magazine. You'll need a 2mm hex wrench. A precision Torx screwdriver also works. The T9 Torx bit fits perfectly in the hex screw.
Once you unscrewed the hex screw, you can pull the plastic internal case out of the metal magazine case.