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View Full Version : .30 caliber Homebrew SMG


The Noid
November 24th, 2006, 07:13 PM
Hello to all. Allow me to introduce myself. I am the Noid and I'm fairly new here, but not to firearms. I collect all types of rifles, pistols, and machineguns, but I really wanted to build my own. I'm very familiar with automatics (especially the Kalashnikov system) in general as I own a couple legal ones so I thought I would apply my knowledge to constructing my own submachine gun.

I've studied Luty's work and I really like his ideas. Very simple. I wanted my SMG to operate in a similar manner, be a larger caliber, but use existing gun parts that were readily available to me out of my parts reserves or fairly common.

I wanted the weapon to fire a decent round, something with more power than a .380 or .32 ACP. I decided on 7.63 Mauser, which is almost if not identical to 7.62 Tokarev. I have literally thousansd of empty cases of 7.63 Mauser so ammo was not going to be a problem. This is what I came up with:

'http://img62.imageshack.us/img62/933/theprojectpj4.jpg'

I had a beat to hell M1 Carbine stock and surplus barrel left from restoring an old M1, so I thought that those would be useful. I had my local gunsmith to cut the chamber on the M1 barrel to accomodate the 7.63 Mauser round.

The reciever is made of 1.75" outside diameter steel pipe with threads cut to fit that of the barrel. I also had to weld the gas port on the M1 barrel closed. I had to use a lathe on some of the bolt, but for the most part is hand made. The extractor is an extra Mauser Broomhandle C96 fitted onto the bolt. The charging handle is from an old .22. The trigger assembly is a hodge-podge of Sten/PPSH-41. It's pretty much a slightly scaled version of Luty's. The spings are all from a Sten Mark III.

The magazine is made from two aftermarket M1 Carbine mags welded, sanded, and blued. One M1 mag would have given me only 11 rounds since the 7.63 is larger in diameter than .30 carbine. I had to make and insert to fit in the magazine to keep the rounds in place since 7.63 Mauser is a bit shorter than original .30 carbine round. The max magazine capacity is 24 rounds.

'http://img62.imageshack.us/img62/4861/theproject2mx1.jpg'
This is a top view of the magazine with ammunition. You can see at the top of the magazine where I made the insert and modified the follower to accomodate the shorter 7.63 round.

I have shot two magazines through it and it only jammed once, and that was on the fourteenth round of the second magazine. I plan to add some sort of optics eventually.

I will apologize for the quality of the pictures. I went out and bought a cheap ass Concord 2.0 megapixel camera just to take pictures (it was all I could afford!). As for a film of the weapon being fired... that won't happen unless I can find someone with a capable camera, but if I do, I'll post a video.

I plan on making a real "Luty" model SMG in the next three months, but I thought I'd knock this project out of the way. I hope you enjoyed it and feel free to ask questions. Thanks.

neo-crossbow
November 27th, 2006, 01:02 AM
Graet little build. I think I mentioned the other day both the .30M1 and 7.62X25 calibres.

You should look at an ultimak scout to top off the M1 Carbine barrel. These mount nicely and mean you can get rid of the top wood from your stock.Check here for more info
'http://www.ultimak.com/m6.htm'

'http://www.ultimak.com/gallery/30M1AimpointChoate.jpg
I have one here with an Aim Point sight and torch, with the compulsory threaded barrel.

'http://img151.imageshack.us/img151/2233/carbinemr5.jpg
'http://img244.imageshack.us/img244/6521/threadgr1.jpg

The Noid
November 27th, 2006, 02:57 AM
Oh, that's nice, Crossbow. I'll definitely check into that.

That stock I have on there is crap. You can see in the picture where I had to repair a chunk of wood the right side with a slice of maple wood and epoxy. The previous owner broke the stock while whacking at a dog that was attacking him. Dunno why he didn't shoot it. I'd really like to get a nice synthetic for this thing. Or perhaps a vertical foregrip of some sort. I know that would help with accuracy.

The 7.63 Mauser/7.62 Tokarev is a great round, and so is .30 carbine. I think they were the fastest round in the world until .357 Magnum came out. However, I have to be careful about shooting the two calibers in the SMG. Surplus Tokarev rounds are much hotter than Mauser. I think it could handle it, but I don't wanna take a chance of screwing it up. I worked too hard on it.

neo-crossbow
November 29th, 2006, 04:12 AM
The 7.63 Mauser/7.62 Tokarev is a great round, and so is .30 carbine.

For a long time both rounds carried some dogmatic hate from most people, I have heard of the .30 Carbine being reffered to as 'the poor man's 300 whisper' but alas when your onto a good thing run with it. I am a great fan of the above calibers. I think the 30 in particular is a good tinkerer of a cartidge and a great wifes gun (I know mine complains at the "recoil" from a mini-14....

I'd really like to get a nice synthetic for this thing. Or perhaps a vertical foregrip of some sort. I know that would help with accuracy
.

I have only had experiance with the ramline synthetic stock, but I would like one of those folders from ultimak. As you can see in the pics of my carbine with the Aimpoint I have the capability to mount a fore-grip but instead have a remote torch mounted ( spose I could do both .) I simply got a length of rail and milled it into the wood, epoxied in some knurled brass nuts and tightened it. You can't use a lazer on the set up as you don't retain zero, but a torch and fore-grip work well.

Keep us updated~!