https://en.wikipedia.org/wiki/Steyr_AUG
LARPfag here. The StG77 is the only rifle I know, but I can't believe you can ask for more.
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Look through telescope
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Put center of crosshairs over target
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Pull trigger
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See target pop
Muzzle velocity is 970m/s -- no imagination or mental acrobatics required for targets closer than a hundred yards. Aim a palm or so higher for each extra hundred yards. The rifle is mostly made of plastic and absolutely no burden, not even on 30 ml walks. Careful cleaning is a requirement for automatic action, though, especially for and after using blinds.
How does that compare to U.S. army rifles? Or a Kalashnikov? A problem for guerilleros might be that all parts are machine-tooled, so you need special equipment for making spares.
The AUG is a very, very sexy rifle. Bullpup so you get a short profile but fullsize barrel and the AUG has a great reputation for reliability and general goodness.
Compared to the AR you will have problems finding parts but the AUG is pretty badass. I don't know much about the AUG long term as i have been sexually involved with the AR for many years now and know it as well as i can know anything besided the AK.
The AK is great but it is a custom gun these days made by different manufacturers and a thing of rivets and steel. The AR can be fixed with a bench vise and hand tools.
If you can get an AUG, get an AUG. Super sexy rifle.
An advocate, great!
Austrian army procurement cost in 1987: ~ a 1000 dollars. I hope I'm not revealing state secrets. I could probably own one legally, but not a fully automatic one ("weapon of war"). For people who are preparing for the worst, spare parts and how to get them are an issue, of course. A friend told me that you can saw and file spare parts for an AR with a jigsaw and manicure utilities from sheet metal. Is that true? No such luck with the "AUG" (never heard that, thanks.)
The AR is usually made in CNC machines and lathes. It's a bit more complicated than what your friend says but oh so easy to maintain and take care of later.
Fun facts, the AR has a safety detent in the lower that is the size of a grain or long rice.
Pretty much for home built guns 3d printing is the next frontier. Lots of cool stuff on there.
Sorry, I confused or misread "AR" as "AK" what I thought is a word for "Kalashnikov", but perhaps isn't, but the friend was talking about the Kalashnikov.
With "AR" you did not mean an "Armalite Rifle", did you?
I did mean armalite. As in the AR15. AR=AR15 AK=AK47 and it's many cousins.
While a lower can be roughed out of nearly anything, the upper is much more difficult (if not impossible) without machining equipment. The barrel extension would also be nearly impossible to do at home. Anything else is fairly simple. Reliable home-builds are the domain of open-bolt, tube-receiver sub machine guns imo.
That I've pieced together myself, it's the rifling in the rifle, right? (I had to look up "grooves and fields"; it's "6 Züge/6 Felder" for the StG77. Was yelled at because I did not know when quizzed by sergeant.)
Why only submachine guns? Aren't they more fragile due to smaller parts?
3D-printers can help a lot, but have limits for force-bearing parts at this point. I doubt that Talibans use them. Not sure what a "lower" and "upper" is, although I read the piece on quora.com .
Also: Automatic rifles are probably a mere incremental improvement over semi-auto in real-life combat.
https://media.midwayusa.com/productimages/880x660/Primary/776/776862.jpg This complex bit is the receiver extension- the bolt itself would be even more impossible to make at home even with a full machine shop. I doubt a homebuilder could properly heat treat such crucial, high-pressure bearing parts, as well. Threading or button-rifling a barrel is actually pretty easy.
Look up the mechanics of a Sten gun or similar- it's just a cylinder of metal backed by a large spring inside a tube. No need to machine locking lugs, ect. Simple/easy to machine and very durable/reliable with quality mags. There exist plans on several forums for home-built versions that don't truly require anything other than a welder for the receiver. A smaller lathe would do the rest if a parts kit wasn't available. If a home-built gun had to be semi-auto it would actually be more complicated/fragile than a subgun's simple lever fcg, due to having to include a disconnector for the semi's fire control group.