I could not hold on a target, a .12 gauge with defensive loads, any faster than your normal Remington or Winchester hunting shotgun cycles, so the "fastest" really wouldn't matter so much to me. I would far rather have the most reliable than the fastest.
"It is better to be too skeptical then too credulous"
It is milled not stamped. Recievers are 50% thicker and can take alot more. Has a self regulated gas sydtem to it can cycle loqbrass iut of the box. Has a magwell, chrome lined barrel and gas tube. Upgraded puc, and internals. All in all its what people spend hundreds on to turn a saiga to a vepr