you should make a pick rail and attach to the lower. And slide magwell on to hold it. with 2 or 3 cross bolt to lock it on.
and what type of filament is that looks like nylon?
what magazines will you use, one of your prototype or one off the shelf.
one for 22lr what do you think is the hardest thing to over feed tower or a magazine that will keep up.
Just ask, mac11 9mm then 5.7x28
Is in bata, then later down the road
It is all ready modeled. Just waiting to to clear the ones that are in the pipe line.