r/GunnitRust

There are 2 steel inserts that guide the bolt inside of the receiver. I'm using a scorpion evo mag. The upper is a 1.5" OD with 1/8" wall aluminum square tube. Trunion is machined from aluminum. I'm making it with the 5.5" chaszel liner. It has last round hold open, an extra trip linkage for the non buffer tube design.

I do have an MnP22 built up but I cut the feed ramp too deep into the chamber so I'm getting case ruptures, fortunately with the current design it doesn't damage anything other then the magazine.

handguard has a nice loft to allow for the whisper pickle..

Section view shows provisions for fun parts

bolt back

In battery so you can see the rollers pushed into the recesses

Non reciprocating charging handle with provisions to slap it

Here you can see the trip linkage installed. the upper pins in front and is held down in back with a spring loaded catch

Does anyone know where to find a cetme l flat? I am not having any luck with Google.

I’m kinda curious to see if anyone out there has spent the time to convert old Sten Bolts to semi auto closed bolt, with a firing pin journal.

Especially with how “complete the kits appear to be these days, it could greatly reduce the overall costs of the kit builds.

Since I was going to port this build I figured I'd do it incrementally, one port at a time, and use my Ransom Rest to analyze the impact against several different variables. I think we all know what impact to expect on recoil reduction. However. I wanted to test accuracy too. Posts disrupt the bore, can shave portions of the projectile, can create weird pressure systems. It has to affect accuracy, right?

Sadly, my results pointed to, maybe. I should have run a higher round count for the analysis. But it's hard to undo porting! So maybe next build? I discuss the results, but depending on which school of statistics you lean towards there is either a definitive connection between ports and accuracy, or there's a non-statistically significant result that points to there being merit in further exploration.

I also cover the CAM and CNC for the slide window and ports at the end for those that like that.