hey there,

working on a project using a ptr91 receiver and a cetme bcg and trunnion.

i know that cetme mags and g3 mags are compatable, but i have heard complaints with feed issues when using the wrong mags for a particular rifle

i have about 50 surplus g3 mags, and wondering will these work

are mag issues caused by the feed angle of the trunnion or cycleing of the differant size bolt heads (i would be screwed as i am using cetme trunnion and bcg) or is it a receiver thing?

so anyone out there with a hk spec that has cetme mags or anyone with a cetme that has hk mags, do you have problems? or is it al hype?

Cetme mags work fine in my 91. Rapid fire, slow fire makes no difference they have been reliable over the past five years.

thanks for the info, that's what I thought however rtg claims that the cetme trunnion is not compatible with hk builds, I believe it was explained elsewhere as having to do with the feed angle in conjunction with the opposing type of bolt, but I was wondering if it can create mag issues as well.

http://www.robertrtg.com/cetmeinfo.html

nice that actually clears alot up for me as i only have a cetme trunnion and thus nothing to compare it to. question, i read recently that hk91 trunnions need to be pressed "through" as in insert the barrel through the tunnion and press from that way ????, as the cetme is hardened differently do i still need to press with that method??

so what then are the mag well differances between the cetme reciever and the hk, and what other differances are there besides the rear sight and base??
and just curious but who sells cetme (non hk mag) recievers?

by the way my cetme buttstock wont fit on my ptr receiver, the ptr renforcement plate gets in the way, doesn't matter to me as i was going to use an hk stock anyway but just thought i would mention it.

i am at a point with 922 parts and hk parts were i could just spend $250 and eliminate all cetme parts from the build, then i would have a true hk spec rifle and a barreless cetme parts kit ready to build left over.

really thinking about it

Except that a Cetme cocking tube will not work with an HK carrier or C-tube support. I think it's funny that people seem to think that swapping HK parts into a Cetme is an "upgrade"! I have spent a very long time studying the components of both systems and the differences are so miniscule as to be meaningless. The HK is a knock -off of the Cetme with very minor dimensional changes to make many of the parts non-interchangeable. The only "upgrade" from one system to the other is the rear sight, I have an HK rear sight on all but one of my Cetme's.

This is what i have done to my cetme.YMMV
I run G3 OD stock sets with full G3 recoil parts.
BUT.
I also wanted the traditional MDL C wood sets. However, mdl C buffers while good, kinda were hard to come across in good shape. So i had a few spare G3 ones laying around. All i did was swap in the wood to the G3 stock base, left the recoil rod and spring in place( G3) , then drilled the stock to accept the G3 buffer .
Internal wise its all cetme Mdl. C I may have dropped in a G3 firing pin but thats it.
Mine will use both mags.
G3/Hk mags are the only issue. As posted above by some the mag catch is the issue.
A simple fix for me at the time was to just file the angle on the mag stops ON THE MAGS not the rifle.
Not all G3 mags needed this done. Some of the FMP ones and a few HK marked mags. The only real issue is one or two of the mags ( i will say they are bad) would double feed the last 2 rounds causing a malfunction( one in the chamber and another stuck half in and out the ejection port).

Sides that, i never got crazy with upgrade's, nor messing with trigger packs etc like some used to when these rifles were new on the scene( i got my mdl c around 2000/02 time frame)

only main issue i had was a bad trigger job that sent me into 3-5 round burst and i had to buy replacements to fix the issue.

I just re-read this old thread and maybe I missed a comment somewhere but I didn't see anything about cetme or HK parts being "inferior" to each other. The issue is interchangeability.

You can use some of the parts you listed as long as you use an HK trigger pack (hammer, trigger, sear) They will not work in a Cetme trigger pack. The HK trigger pack will work just fine on a Cetme though and can be bought cheap from cheaper than dirt. You will need to convert the pack to single action only no matter which you use.
You can use the cocking handle, flash hider, trunnion, and receiver for your cetme build. Don't forget that a US barrel will count too.

922r parts for the Cetme are now extremely hard to find. One person was making hammers/triggers/disconnectors and trigger boxes but has moved on to other things.

Dave should be able to fix you up, he does great work.