[Faust]

Anyone have any accurate dimensions on a RPD?

Thanks.

 

[fuzzsquid]

If you don’t mind me asking, are you thinking about making a receiver? I know there is a market for semi receivers. The best man to get in touch with would be Stan from project guns. I don’t know him personally and he closed his shop. Someone on this board my know how to get in touch with him.

 

[Joey2tone]

If you don’t mind me asking, are you thinking about making a receiver? I know there is a market for semi receivers. The best man to get in touch with would be Stan from project guns. I don’t know him personally and he closed his shop. Someone on this board my know how to get in touch with him.

Stan closed? That's a shame. He helped me on a few builds when I couldn't find answers elsewhere.

 

[Karl_T]

here's the receiver

 

[jaredrLewman]

Is that an accurate print?

 

[Karl_T]

Its worth at least what you paid for it.

Seriously, I'd double check against at least receiver chunks.. if i were going to manufacture, I'd 3D print one, then make one out of AL before pulling the trigger on production.

 

[Faust]

I have access to a Ziess CMM as long as I know what the overall length is I can (I think reverse eng. some of the other dims. Thanks for the info.

 

[Karl_T]

Remember its only a gun. AND rushkie design. Most dimensions have a huge tolerance.

Years ago, we looked at making our own. There is a square bottom pocket for the bolt flap that would need a shaper or EDM. Also a tiny dovetail slot for the ejector that needs a super long shank - trouble. plus a huge narrow double slot for the charge handle. Put all this together and the purchase price looked like a good deal. of course they were available back then.

 

[Faust]

Well I can help with the edm also just have to look at the other features you are talking about. Haven't noticed the dovetail where is it at on the receiver?

 

[Karl_T]

Looks to be missing from that expensive print.

red arrow approx spot.

In looking for this feature, i noticed an error in the print. It shows the back of the bolt flap pocket as square. This is going to have about a 5 degree angle. It must mate perfectly with the bolt flap that is cut at 3 degrees, IIRC. Then do the trig on the flap offset to get this angle.

 

[Faust]

I"ll look at my pieces this week and get back with you all.

 

[jaredrLewman]

Have one of the guys dropping the dims in cad and 3D printing it..