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.
Shorter rifles are easier to maneuver- an 11.5" AR would handle similarly to an AUG coming out of a vehicle or inside buildings, but the short barrel leaves a lot of ballistic performance on the table. Bullpups do have a less ergonomic reload, though, with the magwell being by the operator's torso instead of naturally in the 'working space' directly in front of your, which is also where pistol reloads should occur.
AR is definitely not a bullpup, no.
Interesting, because I guessed that that's better for absorbing the recoil. (As far as I remember recoil was a non-issue with the AUG/StG77, at least while lying on the belly.)
makes sense.