Marlin XT-22 single shot adapter

This is a single shot adapter for Marlin XT-22 bolt-action .22LR firearms. It replaces the factory magazine and allows the user to load rounds manually. An M2 socket-head cap screw is used to engage the magazine latch but any screw with a head diameter of ~3.5mm should work.

It may be a tight fit so some post-processing may be required to smoothly insert/remove the adapter due to differences in printer tolerances.

Updated 2019-09-15 to include a flush mount single shot adapter. Extra steps