Tag Archives: Build

Video: How to build an AK-47, AK-74, AKM. Complete video tutorial by bfgmovies — Best Rivet and Virgin Barrel Build Video I’ve Seen!

Folks, once in a while I find out a snap judgement I made is very wrong.  I was watching AK Build videos on Youtube and ran across this video with a very young man with long hair and anime shirt sitting down to talk about building an AK.  I almost snorted because it must be some kind of a gag.  Within the first five minutes I realized this young man was very knowledgeable, articulate and very capable at demonstrating how to build an AK.  I was floored.  I almost missed this because my snap judgement was so off.  Wow.

This young man assembled a 55:59 long video showing you how to do an AK build with a manufactured receiver using a virgin barrel and he explains things along the way.  To give you an idea of the quality, this video was posted in May 2013, has had 104,441 views, 1,114 thumbs up approvals and only 74 thumbs down.  Folks, that is remarkable.

I am sharing a number of photos from the video to get you to realize this is really good.  He steps you through everything including aligning the blocks on the barrels, the barrel to the receiver, drilling pin holes, headspacing, setting rivets and then final assembly, including installation of the fire control group (FCG), function testing, installing the furniture, and finally winding up with applying Alumahyde II from Brownells as the finish.  I’d honestly say it is the best AK build video I have seen thus far that takes you all the way through the process.  This is really worth your time.

P.S.  The music and anime at the end is a nice touch 🙂

If you want to learn more, check out these other two video by bfgmovies:


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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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How to Install a Flat’s Lower Receiver Rails So They Align With The Front Trunnion

I heat treat the lower rails before I install them.  The best way I found to align the lower rails in a flat so they were both parallel with the upper rail and aligned with the trunnion was to use a drill bits of the proper size to locate the lower rail and I would then clamp the lower rail in place prior to spot welding.  This is one of those things where you want to check and double-check prior to and after each weld to make sure nothing shifted on you.

I use a Harbor Freight #45689 115 Volt spot welder with AK-Builder upper replacement tong and also tips.  It’s lasted me through quite a few builds over the years and is still going strong.  The tong makes it way easier to reach in and make the weld and the tips make the spot weld look a lot more like the real ones.  I have had to replace the tips once so far, just FYI.  You need to keep them clean to be most effective.

For beginners, there is no way to tell you how long to clamp and trigger the current for – many factors can affect how long it takes to heat the steel up enough for the two pieces of sheet metal to weld together.  You need to practice and you’ll notice the color, sound of the welder. the amount of time it takes to get a good weld and especially the feel of the clamps as they come together during the weld.  With practice you’ll feel when you have a good weld especially but it all adds up but you need to actually do it to learn.

Get scrap metal of about the same thickness to practice with.  AKM receivers are 1mm thick.  18 gauge is 1.02mm so it is good to practice with and old scrap receiver stubs are another.  With your first practice weld, go long and let the pieces really melt together so you can see.  You want to burn a hole to understand how long it takes, the sound and the feel of the tongs.  Then practice with less amounts of time until you find the sweet spot.  These welds should be pretty strong and not pull apart easy.  I do more spot welds than most and some guys look at photos of the rifle they are building and try to approximate the count and location, which is just fine.  One thing, if you do heat treat your rails before hand like I do, be careful you do not get the tongs up against the ejector and ruin the heat treat.  I’ve done it and the tell tale sign is that the ejector will be discolored from the heat.  If you do make this mistake you will need to heat treat the tip while it is in the receiver or else it will definitely peen over and be deformed in its softened state.  By the way, the steel should be relatively clean also and not have tons of grease or other contaminants on it either that might inhibit a good weld.

Just double check alignment very carefully before you spot weld and also that your welder’s tong does not get against the ejector and ruin the heat treat – assuming you did that before installation.

I hope this helps you out!


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Very Good AR Lower Receiver Assembly Videos on Youtube

Have you ever wondered how to assemble an AR lower receiver and were curious  what free resources are available?  I spent some time on Youtube and collected  a list of videos that show the viewer how to assemble a lower receiver for an AR-type rifle.  I would recommend watching several as each presenter’s methods has pros and cons plus there are different details and camera angles in some cases.

“Gunsmithing – How to Build an AR-15 Lower Receiver” by MidwayUSA


“EASIEST AR15 lower build diy, step by step” by dutchofsc

“AR-15 Lower Receiver” by bgallaher77


I really liked all of the above and hope you find them useful.