Super Drum 70 by KptnAutismus

Hardware-only kit includes M3 screws, 8x drum springs, bearings, and 25mm spring to build the Super 70 Drum. (including the extra screw and heatset for molle clip version. 

Pictures, printed parts, and full builds coming soon. (scuffed listing to get it up)

Check it out here:
https://www.printables.com/model/1162512-super-drum-70-talon-compatible-70-round-nerf-half