Our take: This BattleAxe Airsoft G36/MK36/R36 Magwell Conversion Kit allows you to use M4 magazines with your G36 AEG! This is a great way to make your R36/ G36 AEG look more unique and make it compatible with almost all M4 magazines. Now you can finally swap M4 magazines with your teammates, when you"re in a pinch! This Magwell Conversion Kit works extremely well and is constructed of high quality polycarbonate plastic. The conversion kit is very easy to install on compatible AEGs, and fits securely in place. The magazine release on the Magwell Conversion Kit is also similar to a standard M4 magwell with a left facing magazine release lever. This feature makes reloading much easier, and most M4 magazines will fit securely inside the magwell. This conversion kit also allows you to use M4 drum mags, however M4 box mags will not work with this magwell. The BattleAxe Conversion Kit does not impact performance of the AEG in any way, and is only a conversion kit for Mk36/ R36/ G36 AEGs to use M4 magazines. Specs: Construction: Impact resistant Polycarbonate Plastic Color: Black Weight: 5oz. AEG Compatibility: Tokyo Marui, Classic Army, SRC, KWA and other compatible MK36 series Airsoft AEGs Magazine Compatibility: JG, Matrix, Echo1, Tokyo Marui, Classic Army, SRC, DBoys and other compatible M4 type Magazines (Hi-Caps, Mid Caps, and Standard Caps WILL work with