Some CETME / HK "Build" pics

FAL, G-3 and L1A1 rifles.
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NorincoKid
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Location: Spring Hill, Hernando County

Some CETME / HK "Build" pics

Post by NorincoKid » Mon Dec 03, 2018 3:43 pm

Ill start with mentioning that I am a absolute NOVICE with a welder. I really...really am not good with it. Pretty much watched a youtube video, grabbed an inexpensive STICK welder and started screwing around with this kit. Please, for the love of Christ, do not look at this as a guide as to how to build one of these. It's probably better to look at it as more of a "Damn dude, that's NOT how its supposed to look" kinda thing.

That being said, Finally got around to test firing this death trap of a HK clone today.

Despite the poor looking welding, it stayed together. The bolt carrier was a little sluggish for the first couple rounds but after that it started smoothing out (breaking in a little?). Seemed to cycle fine after the first two rounds through. Its actually quite pleasant shooting, mild recoil. Probably should have oiled it though.

I read that a TIG is preferred, MIG can do it, but never saw anyone in what I was reading do it with stick. It was alot of (poorly) cleaning up, a lot of figuring out the amp settings to get good penetration, trial and error etc. But it seems to be holding together. I'll likely re-do some of the plug welds so they are prettier looking though.

Anyways, a few pics I took along the way. Again, please keep in mind this is in NO WAY a good example of how to do these. Just wanted to show that it technically can be done at a low skill level, with entry level welding equipment and wind up being an ugly but functioning rifle.

Kits/barrels/flats are still pretty reasonable for these.


Got lucky and was able to grab a pair of the Gewehr Werks G3 bent receivers for $50 a pop when they blew out the rest of what they had. I couldn't buy a flat and bend it myself that cheap.

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Get some kits cleaned up. Get the barrels headspaced and pinned, easier to slide a barreled trunnion assembly into the receiver than try to do it after the trunnion is welded in.


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Old scrap receiver pieces help with making sure everything is lined up and cut properly. All the cuts & holes in the flat are undersize and need to finished to fit the new parts.

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I started in the back. Used a 110v Harbor Freight spot welder setup for AK47 receiver rails to tack a support bracket inside the rear of the receiver. Then opened up the little holes in the flat (and the newly installed bracket) to about 8mm and ran a pair of bushings straight through. Then I welded up the seam on the bottom of the receiver where it comes together.

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Then I used the HF spot welder again and started to mock up / tack the receiver together for the magazine release area. Just spot welded the shit out of it. Fit the semi auto shelf, and magazine release arm slot. Once it was all "as good as it going to get" , I just welded up the seam.

I located and set up the pin for the bushing that paddle release rides on. Gotta be kinda careful here because its frowned upon to go all the way through the other side of the shelf according to the ATF. The pin will have to be ground flush and welded up when welding the shelf in.

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^ Run a bead up the seam

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Test fit some stuff;

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Then time to weld up the front of the magazine well and bottom of the receiver under the trunnion and start drilling the receiver for where its going to be plug welded.

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Some really shitty looking plug welds, and cocking tube seam. I got lucky and my cocking tube gap was pretty good as it sits and didn't need any messing around with.

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Weld on the rear sight base, and then go on to the final "Grind, look, hit it again with welder if need be, grind, look, repeat" until everything seems as rock solid as its going to get.

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Smooth up the garbage looking welds as best you can, clean it up and hit it with a healthy coat of Rustoleum Appliance Epoxy and hang that bitch in the garage for a day. Tape off the muzzle threads and charging handle / support. After a good day's cure in a hot & stuffy garage, pop it in the oven @ 350F for about an hour. It will smell bad. Do it while the wife isn't home & open the windows. Its a little shiny, but a pretty tough scratch/chemical resistant finish for $5

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Then remove some of the Full Auto bits from the FCG pack, and cut a notch in the front of the pack to clear the semi-auto shelf.

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Clip the ears on the old housing to clear the new shelf as well, you can "open the up" and keep them, make it a little more aestetically pleasing, but I didn't care enough to do it. I can always grab another housing and try If I want down the road.

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Fits nice. No real vertical slop. Wound up using a plastic housing though until I found a good looking green grip for the steel housing. So now that its cooled off from its trip to the oven, slap the parts together.

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Could be worse. Everything wound up in spec. Good heaspace / bolt gap, good cocking tube gap, proper, albeit heavy, semi auto trigger funtion. Needs a "tanker" mag though.

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NorincoKid
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Post by NorincoKid » Mon Dec 10, 2018 3:14 pm

And a family pic.

I might have a few pics of the MP5K during the build process, I'll have to dig.

It was, in some ways, a bit more tricky to get everything where it needed to be. Interesting note, I found the scrap receiver portion from the K and it was marked "EN MP5k" , Enfield? Maybe a British SMG?

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Hoping to have the stuff together to start working on the CETME-L in 5.56x45 this coming spring. Looking forward to that. Seems like a neat little carbine.

JonathanW
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Location: Lutz

Post by JonathanW » Mon Dec 10, 2018 3:25 pm

Looks good!

osprey21
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Post by osprey21 » Wed Dec 12, 2018 5:47 am

NorincoKid wrote:
Mon Dec 10, 2018 3:14 pm
I found the scrap receiver portion from the K and it was marked "EN MP5k" , Enfield? Maybe a British SMG?

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The differences between the British made guns and the German made ones pretending to be British - the British made ones spine will look like the above picture spine - EN M(letters run together)P5 KAL. 9xmm19, #####(Serial Number) #/##(Production Year)

The controversial ones that were German made then sent to Enfield for assembly to be sold to countries with trade sanctions with Germany have a upper receiver spine that resembles the picture below: En MP5 C#####(Serial Number) EP/##(Production Year-Mid 80s) (Stamp of a Crown).

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Hope that helps. :)
I am not frozen by political correctness. Beware.

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NorincoKid
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Post by NorincoKid » Wed Dec 12, 2018 8:09 am

osprey21 wrote:
Wed Dec 12, 2018 5:47 am
Hope that helps. :)
It does, thank you! I didn't know much about the Brit guns.

Pardon the crappy picture, this is the scrap after pulling the trunnion and magazine release pieces. A little different than the two you pictured though?


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osprey21
Posts: 33
Joined: Thu Jul 19, 2018 5:30 pm
Location: Manatee County

Post by osprey21 » Wed Dec 12, 2018 8:55 am

NorincoKid wrote:
Wed Dec 12, 2018 8:09 am
osprey21 wrote:
Wed Dec 12, 2018 5:47 am
Hope that helps. :)
It does, thank you! I didn't know much about the Brit guns.

Pardon the crappy picture, this is the scrap after pulling the trunnion and magazine release pieces. A little different than the two you pictured though?
I "heard" many years ago (late 70s) that the the "K' guns were made for a Yugoslavian contract but the deal fell through before they were exported. Supposedly they came with the Yugoslavian seal and a "YU" prefix before the number. True, I dunno. Interesting none the less.
I am not frozen by political correctness. Beware.

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