In a moment of weakness I ordered the Arsenal video:
At barely over 13 minutes is it worth the price? Maybe.
There are several interesting scenes of inspection and testing, including one where the weapon has to fire a continuous 200 rounds on full auto without cooking off any rounds from the next magazine.
Most of the scenes are with the milled guns, so if you own an SA M7....
There are torture tests, including freezing a milled AK to minus 50 degrees Centigrade, burying it in dirt, and dunking it in a muddy pond several times. Of course the gun works.
Probably the most interesting section, though, is the expected accuracy.
Arsenal rifles are expected--at the factory and in a special firing jig--to fire four rounds within a 15cm circle at 100 meters.
There are several scenes of firing Arsenal AK's with the Bulgarian underbarrel grenade launcher and on full auto.
You can also clearly see that the plain muzzle nut ain't NO flash hider!
I've had the video one day and I've watched it three times already.
15 cm (100yds) is approximately 6" = 6 moa which is consistant with published data for AKs
For an AR, the same Mil-spec requirement is 5" (@ 91 yds) = 5 moa (approximate)