I ordered mine last Friday and received it Tuesday due to my proximity to the Warehouse (I'm in Edmonton). I have broken the gun down to perform a cleaning, inspection and pre-fire lubrication of the moving parts. While not as nicely machined as my Benelli M4, the quaility of the machining is certainly passable with what I would consider to be above-average fit and finish. The action cycles in both the Pump and Semi-Auto mode about as smoothly as one could reasonably hope for, given the unique dual nature of the operating system. It certainly requires less effort than I recall having to exert with a Franchi SPAS12 in Pump-action mode back in the day. But I digress. The spring-loaded latching mechanism for switching between Pump and Semi-Auto function was initially stiff and a bit finicky, but has quickly loosened up just enough that it now easily slips positively into each setting.
I have yet to fire my new shotgun, so at this point the jury is still out regarding reliability and accuracy. FWIW, my Bolt and Fore-Grip do not jump forward under their own steam when I hit the Bolt Release Button either. It requires a slight forward "nudge" on the Fore-Grip to get things moving forwards into battery, and I'm OK with that as I have every intention of forcefully returning the Fore-Grip forwards under positive control with my Left Hand in any case.
I would prefer that there were a Retractable Buttstock and Pistol Grip option, as is the case wwith the Sulun M4. Is there any chance that TACTICAL IMPORTS can source Sulun M4 Rear Ends? I'd definitely be down for a Retracting Buttstock and Pistol Grip if available, as I cannot find Sulun spare parts such as those anywhere that I have searched.
I have ordered an M2 Enlarged Charging Handle, as my Benelli M4's Handle did not fit. Hopefully the M2 is the correct configuration. I also went with an S&J Enlarged Bolt Release Button, which must be drilled and tapped into the existing steel "button" of the Shotgun. I chose to go this route rather than having to worry about whether a (much more expensive), genuine Benelli M4 Enlarged Bolt Release from GG&G would be compatible with the dimensions of the Sulun M4 Receiver. This way I just drill, tap, tighten one screw and I'm off to the races with a Bolt Release that is impossible to miss.
I added some much-needed skate-board Grip-Tape to the smooth, slick surfaces of the plastic Fore-Grip. A few cents worth of tape makes for a HUGE improvement with much more positive handling in Pump-Action mode.
I currently have the Aridus Industries modular Side-Saddle with quick-release "Cassettes" each holding 6 shot-shells mounted to the Left side of my Receiver. I made sure to leave ample clearance for the Pump Action Fore-Grip when fully rearwards so that the Bolt Catch reliably engages when there is no shell on the Lifter.