As always with RAP4, after many false release dates, they have finally released their 30rd DMags. For those who are unfamiliar with the DMags, they are polymer .68cal mags sold by RAP4 which are compatible with their magfed markers, and the MKV conversion kits (provided you have a DMag magwell). Unlike RAP4's standard mags costing a nice $37 dollars per mag, the DMags are incredibly cheap. The 20rd DMags are just over $5 a piece. The only down side to the DMags is that unlike the standard and Scarab Arms mags, the DMags are stacked. This means that if you have a 20rd DMag, the mag doesn't have a continuous feed of 20rds, but instead it has two stacks of 10rds. So essentially after every ten shots, you have to pull the mag out, spin it, and put it back in. However again, they are insanely cheap. The other downside to the DMags is that they are straight, where as the standard and Scarab Arms mags are curved. This makes for a visually longer, larger mag. That's why it is shocking to some to see that RAP4 would release the 30rd DMag. While it enables you to fire 15 consecutive shots, it also doubles as a monopod.
You can view RAP4's 30rd DMags on their site, Facebook, and Youtube.