Took me some time to figure out how to actually properly merge/group the notches from Astropulse's non-ejecting remix to a Sniper-Shell w/collet, so i figured i'd save some of you guys the hassle and upload it as a remix.
Print the same as the other silly shells:
As with the original of the Sniper-Shell you will also need:
The author remixed this model.
It's Astropulse's notches but merged to a Sniper-Shell w/collet.