Raptor like ambi charging handle for the ruger mk4 (and possibly other models). Should pop right onto the end of the bolt by flexing it apart. There is a spot for a heat insert and a screw if you have issues with it being loose or want it to be more secure however in the picture I didnt have an appropriate length so I left it off due to the fitment of mine being spot on. Printed in PLA +
The author marked this model as their own original creation.