Solid Nub Upgrade for MTW Gen 12

This is a perfect upgrade for the Gen 12 to get a bit more range. The solid nub has less give so it is able to apply a more consistent hop to each of the 8 BBs.

Using the stock 208mm AEG inner barrel, Maple Leaf MR 60 (lips cut off), and solid nub, we were able to get 150ft (~45m) range with 4 out of the 8 BBs on average. 

Up to a 285mm inner barrel will fit after removing the barrel spacer (this length will stick out slightly, but will be covered up by the flash hider). With a 285mm barrel, we were able to get over 200ft (~60m) of range on average. 

Note: other nub styles, like a Maple Leaf Omega, will not fit the Gen 12, the best nub that we have found is a traditional nub without a hole in the middle.