I know other models exist, but nearly all of them have a lip on the top which goes over the knuckle. I'm more fond of the design where the claw just comes out between the knuckles, so I made this. Just plug the blades into the grip and they friction fit. You can add superglue for more strength, but so far I haven't needed it. The claws I printed at .15mm layer height but you can probably get away with .20mm. And the grip I printed at .20mm layer height. No supports needed. 

These were sized to my hand so the space between claws is 20mm, and the claws are 250mm in length or about 10 inches, and able to be printed on regular print beds diagonally. 

Happy printing and “Let's f-ing GO!”

Update 7-30-24: Added a gag model where the claw is cut in half so you can pretend you are stabbing your friends/enemies or yourself ;) 

Update 8-8-24: Added another grip model with slighly wider holes (.5mm to be exact) to help with fit. 

Update 8-28-24: Added “Whiskey Dick” Claws to simulate problems extending claws. ;P New claw models at 50mm, 75mm, and 100m lengths.