Any of you guys ever build a non-AR 80% gun

Mr_Roboto

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Looking at potentially getting a CZ26, Uzi, Suomi or similar parts kit to build into a gun. Wanting to try something different than an AR. Anyone ever do this?
 

BADAZZTEALCOBRA

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I’m doing a poly80 full size Glock 34 right now.... just waiting for a final few pieces to arrive.
 

Mr_Roboto

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https://www.gunbroker.com/item/791370849

And another thing. Looking at the springs on this, I am thinking it will probably be another fixed firing pin bolt gun. I'm going to likely have to find someone with a lathe that can do some additional work on these to convert to a semi auto setup.
 

Mr_Roboto

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What's going to be interesting on this is getting 922R compliance. I think that is gonna be a huge headache. These are honestly going to likely be (very) slow going builds. That said, the Uzis are supposedly at 13-4 parts (you need 10 max) for 922R compliance which means that the CZ won't be far behind. This is what The list consists of so far:

1-Receiver
2-Barrel
3-Trunion
4-bolt
5-operating rod
6-trigger housing
7-trigger
8-sear
9-disconnector
10-stock
11-handguard
12-magazine body
13-magazine floor plate
14-magazine follower

So with both builds I'm going to end up with a US made receiver and barrel since my kits don't have them. The idea that the guide rod is actually an operating rod is controversial so I may try to send an ATF letter off for clarification. By definition it doesn't actually actuate any mechanism in the gun, the spring on it does and apparently rulings on this have been mixed at some point in the past.

Looking around on line mag plates for the CZ are about 5 bucks each and if I have a US barrel and receiver I'll be at 10 flat provided that they clarify it's NOT an operating rod. Even if it is, I may just cut it out and weld in another piece of rod from mcmaster instead. It would be an easy fix.
 

Mr_Roboto

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Dropped an email to the ATF to figure out one way or another; Gonna be on a list for this shit. :rofl:
 

Mr_Roboto

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Letter back from the ATF. Can't say I'm too thrilled about this. They litterally want me to send in something I built after I built it. What the hell kind of law is defined after you've broken the law? This seems really fucking bass ackwards to me.

Our office does not advise how to build firearms or firearm accessories. We evaluate them after they are built and provide an official determination/classification.



Please be aware the Firearms and Ammunition Technology Division does not make determinations based on drawings, photographs, written descriptions, or diagrams. In order to render an appropriate classification a physical sample would need to be submitted to the Firearms and Ammunition Technology Division for evaluation. If you would like to send the subject sample item and any supporting information and questions, please ship it to our address:



Bureau of Alcohol, Tobacco, Firearms, and Explosives

Firearms & Ammunition Technology Division

Attn: FTISB

244 Needy Road Suite 1600

Martinsburg, WV 25405



It should be noted that correspondence from our Division is dependent upon the particular facts, designs, characteristics, or scenarios presented. Although other cases (submitted to our Branch) may appear to present similar issues, FTISB classifications only pertain to the particular item submitted and evaluated. We caution against applying the classification in our correspondence to other items because complex legal or technical issues may exist that differentiate one item from another that only appear to be the same.



You must include a pre-paid label for the return of the item. If shipping any firearms we advise you ship them via FedEx or another similar carrier. Also, we cannot guarantee that the item(s) will not be damaged or destroyed during the evaluation process.
 

BADAZZTEALCOBRA

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Yeah, that looks like a headache waiting to happen. I would be out on that one.
 

Mr_Roboto

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SO lets do an update. First part kit showed up, second one just shipped way late. Guy said he was sick.



Here's the trigger housing with the sear outside of it. The little piece is the trigger actuator for the progressive full auto. This was an open bolt sub gun with a progressive trigger. Pull it half way, it'll shoot one. Pull it all the way it'll shoot till it's dry. Don't want to visit club fed, so it's gotta go. :(



Here's the disconnector and springs housed in the sear. The spring is stepped and there's a little insert in the bigger of the two. That's the sear return spring, the little one is for the disconnector.

The disconnector its self is just a screw that's been cut off and had a couple flats ground in it. Really simple and it may get replaced with a US made screw for 922R purposes.



Here's the back of the sear. You can see that they drilled a round hole then smooshed it a bit to keep the disconnector from rotating.



This is where the blocker goes to keep new FA parts from going back in to the trigger housing.



All done, put a bead in there. Nice and sturdy tested it with the side cutters.

 

BADAZZTEALCOBRA

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IMG_2893.jpg

Just wrapped up the Poly80 G34 build... Hoping to put some rounds through it next weekend
 

Mr_Roboto

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That's hot. Guessing a lot of titanium nitride parts. Was it hard?
 

BADAZZTEALCOBRA

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That's hot. Guessing a lot of titanium nitride parts. Was it hard?
Yeah, quite a few TiN parts for sure.

It was surprisingly easy to to, a Dremel tool with sanding drum, a round 3/8” wooden dowel, a square 1/2” wooden dowel, and some 400, 800, 2,000 grit sand paper and an hours worth of time had the frame ready to go.

The only Glock factory parts are the magazines.
 

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