Friday, April 17, 2015

PRT22 Final Assembly and Proof of Life

Part 1 - Part 2 - Part 3 - Part 4 - Part 5 - Part 6 - Part 7 - Finished Pistol

This is it! I went ahead and reblued all of the bare surfaces and scratched areas. Then I assembled it and did some string-assisted test firing at the range. Watch the video below:


I put over 300 rounds through this gun and counted four light strikes. The light strikes could have been caused by cheap ammo or not seating the cartridge all the way, but regardless it ran like a champ. And the best part is that it actually ejects! This is a pistol with no extractor and no ejector and it sends empty casings six feet downrange every time! It works!

Hit the jump for some closeups.

Friday, April 10, 2015

3D Printed Forward Charging Handle

Here's my idea for a forward charging handle that could be used on an AR-based bullpup, such as the one that's being developed over at FOSSCAD
It's a single printed piece that slides along the Picatinny rail on top of the upper receiver. When it is pulled back, one of the feet at the back actuates the catch on the rifle's original charging handle.


Sunday, March 29, 2015

Monday, March 23, 2015

PRT22 Rat Trap .22LR Single-Shot (Part 5)

Part 1 - Part 2 - Part 3 - Part 4 - Part 5 - Part 6 - Part 7 - Finished Pistol

Moving on to the frame. I lined up the top edge of the templates with the factory edge on the metal sheet.

PRT22 Rat Trap .22LR Single-Shot (Part 4)

Part 1 - Part 2 - Part 3 - Part 4 - Part 5 - Part 6 - Part 7 - Finished Pistol

I still had a good length of the barrel blank that I used for the PEP22. Even better, I had previously chambered both ends using the chamber reamer that Guild member garthok loaned to me.

Sunday, March 22, 2015

PRT22 Rat Trap .22LR Single-Shot (Part 3)

Part 1 - Part 2 - Part 3 - Part 4 - Part 5 - Part 6 - Part 7 - Finished Pistol

I started working on the front trunnion. I made this from flat bar. I used a series of drill bits to get up to the final diameter.