Looking for demilitarized MG42

[K98dkmauser]

hey RR i would be interested in the jig when i get started but it wont be for a while

[johnb593]

Most of the cuts have been made to the receiver. Now I'll work on smoothing the edges, etc and then proceed with the next step. Sorry it's taking me so long but I work slow! LOL

[JBaum]

Slow and straight is always better than fast and crooked.

[johnb593]

Slow and straight is always better than fast and crooked.

LOL I hear that!!!

[johnb593]

Okay, I have a question here and maybe a problem. Are the notches/grooves necessary and if so how deep do they need to be. Also, I'm afraid I cut too much out on the forward end where I have it marked "screwup?". Is this a problem?

[K98dkmauser]

shouldnt be to much of an issue if any at all

[roadrunner]

Hi John. That area marked screwup shouldn't be an issue if its gone too high. The grooves are .077" deep and very necessary. They will hold the charging handle in line. That only leaves .023" thickness below groove. On the brp rears Things get pretty thin where it breaks over "radius" After milling I decided to weld a bit of thickness back on the leading edge. Read old threads of cracking out there. Even on original receivers.
I see you went ahead with the buffer cutout plan. I'm not concerned about the strength there if its welded proper. However, aligning them both can be a trick. You still need to cut the rear circular relief for the buffer and get it to match your scrap pieces. Now that the pieces are cut out from rear that is going to be harder. Then the two side reliefs are still needed. I'm also concerned that if you put your buffer in to line it up and weld, it will be a bear to remove. Call me overly cautious but I always try to look several steps ahead so I dont screw myself.
Nevertheless. Your making great progress and theres nothing there that we cant figure out together. Heres some pics. of my solution to the thin edge on my c/h milled slot. Take care, Wally

[johnb593]

Hi John. That area marked screwup shouldn't be an issue if its gone too high. The grooves are .077" deep and very necessary. They will hold the charging handle in line. That only leaves .023" thickness below groove. On the brp rears Things get pretty thin where it breaks over "radius" After milling I decided to weld a bit of thickness back on the leading edge. Read old threads of cracking out there. Even on original receivers.
I see you went ahead with the buffer cutout plan. I'm not concerned about the strength there if its welded proper. However, aligning them both can be a trick. You still need to cut the rear circular relief for the buffer and get it to match your scrap pieces. Now that the pieces are cut out from rear that is going to be harder. Then the two side reliefs are still needed. I'm also concerned that if you put your buffer in to line it up and weld, it will be a bear to remove. Call me overly cautious but I always try to look several steps ahead so I dont screw myself.
Nevertheless. Your making great progress and theres nothing there that we cant figure out together. Heres some pics. of my solution to the thin edge on my c/h milled slot. Take care, Wally

Thanks Wally! I very much appreciate that. I was sweatin' it out! LOL I don't THINK welding in the original buffer plates correctly is going to be a problem but I have my fingers crossed. One thing that has me stumped is that the charging handle only travels about an inch and a half in the cutout slot. What am I missing here? It doesn't look like that'd be enough to pull the spent shell out, etc. I know there's a good explanation but for the life of me I just can't seem to "see it".
Thanks again!

John

[johnb593]

shouldnt be to much of an issue if any at all

I'm relieved to hear that! Thanks!

[roadrunner]

The charging handle will run the entire length of the grooves yet to be milled. It is sandwiched between the ratchet plate and receiver. Running in grooves on both. The cutout is where the c/h enters the receiver. I had to do alot of relief filing in the inner forward lower right of receiver as the radius on brp shell was a bit too wide. Did this before welding halves together. You will have to do it from the front. It's important that the forward section of the c/h lays low and tight to the right.

[johnb593]

As my receiver is only spot welded right now I will separate it and do whatever needs to be done on the inside (including the inside grooves for the buffer/butt). I also need to mark off where the rails and their rivets go and get that installed. Another thing that I will have to address is the bolt. I shaved off the "bumps" a while back but I'll need to get and add on the bolt extension sleeves for s/a. Or can I find one on line that is already modified? That would help a LOT.

Thanks Wally!

John

[johnb593]

As my receiver is only spot welded right now I will separate it and do whatever needs to be done on the inside (including the inside grooves for the buffer/butt). I also need to mark off where the rails and their rivets go and get that installed. Another thing that I will have to address is the bolt. I shaved off the "bumps" a while back but I'll need to get and add on the bolt extension sleeves for s/a. Or can I find one on line that is already modified? That would help a LOT.

Thanks Wally!

John

Since I posted the above I find that BRP has the bolt extension piece I need. Ordered it today.

[K98dkmauser]

you are really lucky to have roadrunner helping ya. i think he is probably one of the best there is when it comes to this

[johnb593]

you are really lucky to have roadrunner helping ya. i think he is probably one of the best there is when it comes to this

I completely agree! I just wish he was local!

[johnb593]

Here are some shots of the cuts after I have had some time to do some cleaning up, etc. Satisfactory?

[johnb593]

After my previous post I noticed a couple of places that needed some work as noted in the attached photo. After that was done I test fitted the grip assembly and it fit just fine. Nice and snug.

[JBaum]

Good tight fit, but the grip is in backwards....

The charging handle is on the right side when the gun is pointed forward.

[johnb593]

Good tight fit, but the grip is in backwards....

The charging handle is on the right side when the gun is pointed forward.

OOPS! Thanks. A recheck is definitely in order.

[johnb593]

Okay, recheck done with grip placed correctly (not backasswards). Still okay fit but not as snug. Comments?

[JBaum]

Not trying to nitpick here, but unless you're building a machinegun, the receiver isn't supposed to be able to mount the standard MG trigger grip. If you're building an MG, then it's fine.