This thread is definitely coming across as snobbish. As the one utube reviewer kept reminding his viewers, "This shotgun IS 1/3 the cost of a Benelli M4."
The Chicoms have cloned a number of guns including the Browning ATD-22, the 1911, the Model 1897 shotgun, the 870, and the M-14 to name a handful. Rossi cloned the Winchester 62A. The Indians reverse engineered the FAL and it worked sufficiently for them. All of these were venerated, proven gun designs. Some of the Norinco made guns have the occasional part not interchangeable with the originals yet these clones are well thought of and command prices much higher than they originally sold for, surprisingly in line with the current market for the originals, sometimes higher.
All I care about is that a gun goes BOOM immediately followed by small, hot, metallic thingies being forcefully expelled from the muzzle at very high velocity, reliably. Nothing else matters. And from the posted 17+ minute video review along with his followup on compatible mods I've concluded there is NOTHING wrong with the Turknelli M4 that cannot be easily resolved, in particular that being the matter of the shell stop. As far I can tell the only operational malfunctions were a combination of needing more hotter buckshot loads to break it in and avoiding that low end cheapie Winchester ammo.
Now with that said, how many of you snobbish Benelli owners own a Mossberg POS? (Yes, Mossys are genuine POS).