Perfectly slips onto your Umarex Glock 17 gen 4 magazine! Ive only tried it on a .177 bb CO2 mag but it may work for airsoft idk. It fits perfectly with no wiggle, I couldn't find a single baseplate for this mag so I made one. I recommend PETG or stronger since the rails are a little thin. Make sure to orient the baseplate properly with the bottom on the printer bed! The differences in files are: Fancy milled look vs smooth basic look My name logo on top vs on bottom Link to the OEM style baseplate I made https://www.thingiverse.com/thing:6020898
Download from thingiverse