Tag Archives: AK47

Video: How to build an AK47 from scratch part 6 (the last part) by usmcdoc14

This is his last video in the six part series.  He recaps what he did and shares with you some of his tips for sandblasting such as putting foam earplugs in the chamber.

Here are the links to each segment – when you click on them they will open in a new tab:


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Video: How to build an AK47 from scratch part 4 by usmcdoc14

In this fourth installment, you can see usmcdoc14’s welding results and he discusses how to trim the top rails.  Note, a lot of flats and receivers now have pre-cut top rails so you only need to trim them if they look like what you see in the video – big, wide and straight.

Here are the links to each segment – when you click on them they will open in a new tab:


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Video: How to build an AK47 from scratch part 3 by usmcdoc14 [He is doing a weld build]

   

Now in this video he shows how he does the actual welding of the front trunnion.  I will definitely post some videos on how to do rivet builds also.  For guys looking to build authentic AKMs with sheet metal receivers that is the route to go.  I’m not disparaging weld builds – I’ve done at least three that I can recall.  For home builders you have three methods and they all work if you take your time to learn and then build them the right way – rivets (the traditional and proven best approach for full-auto military use), weld builds and screws.

Here are the links to each segment – when you click on them they will open in a new tab:


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Video: How to build an AK47 from scratch part 2 by usmcdoc14

  

Here is the second video in usmcdoc14’s series about building an AK using a flat.  He still swears left and right (which I find hilarious – when he said “sandblast the shit out of them” I started laughing) and gives you some good recommendations on checking the past receiver stub from the kit.  He talks about his approaches for weld and rivet builds.  He does make one comment I don’t agree with.  To press out the barrel from the rear trunnion you do not need to remove the rear sight block (RSB) – you just push out the barrel pin out and then press the barrel out.  Second, and this is just my opinion, with a weld build I would still drill some holes where the rivets were at and do plug welds otherwise you are going to pour on a ton of heat, may still not get good penetration and risk ruining the heat treat of the trunnion locking lugs.

Other than that, I think it is a good video and worth you watching and learning from.  Your best bet is to watch multiple guys and decide what works for you.

Here are the links to each segment – when you click on them they will open in a new tab:


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Video: How to build an AK47 from scratch part 1 by usmcdoc14

 

A few guys have contacted me wanting to learn more about how to build AKs from kits.  Many of the resources I learned from when I started way back when (ballpark in 2006) are now gone.  I do recommend AKFiles and their gunsmithing section so check that out.  We really didn’t have Youtube then and when I did some research I found some great videos for you to watch.

A gentleman on Youtube, usmcdoc14, put together a four part series.  This is part one and is 29:58 long.  He swears left and right and I got a real kick out of watching and listening to him:

Here are the links to each segment – when you click on them they will open in a new tab:


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Converting a milled M70 receiver stub to a stamped receiver front trunnion using plug welds

I miss building AKs – I never have the time any more.  At rate, some years back I wound up with two Yugo M70 front milled stubs, and then decided to convert the rifle to a stamped receiver because I liked working with AK-Builder flats.  So, in the spirit of trying something new, I decided to convert a stub to a trunnion and plug weld it in place vs. trying to machine the rivet seats inside.

Yes, I’ve heard tons of people say not to weld them together and that rivets are better.  Yes, rivets are better and I have done many of them.  Have I ever had problems with a weld build where I filled plugs, stayed away from the locking lugs and was careful with the heat?  No, I have not had any problems.  I have an AMD-65 with tons of rounds through it that still runs fine.  My thinking is that I am not firing full auto, not using grenades, don’t use this in combat … I’m not really stressing it.  What would I use for a reliable build vs. a test like this?  I’d use rivets.

This was almost eight years ago.  I found the photos and thought you might like to see them.

Here are the front stubs.

When you look at the front stub, you can see readily it could become a trunnion.

Here’s a Hungarian AMD trunnion next to it.

Here are the stubs from a couple of angles.  I already used my bandsaw to cut the top one

Ok, time to make some chips.  It’s secured an I’m milling the OD under the top shelf of the trunnion that sticks out over the receiver:

I didn’t have anything to cut the slot with for my mill so I clamped a straight edge and then ran a Dremel wheel down it over and over until I got the depth and width needed for the stamped receiver to to slide into:

My theory was that by drilling holes and filling them via plug welds that I could lock the receiver into place.  Thus, I drilled holes for the plug welds both in the stamped receiver and into the newly made trunnion:

The plug welds were done with a Harbor Freight 220V MIG running ArCo2 gas and .030 wire.  I let it cool down after each weld and was careful not to pour on a ton of heat.  Notice the relatively big weld area to distribute the load.

I then sanded it all down with a flap sander.  The back was just a regular M72 rear trunnion that I found at R-Guns. I never had problems with cracking, etc.  The experiment seemed to work for a casual use semi-automatic rifle.

That’s all I have as far as photos go.  I hope maybe it gives you some ideas.

Writing this makes me wish I had time to build another AK but it’s back to our grips and handguards 🙂


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