Maybe having to take the barrel off to adjust velocity
This marker is truly a dream. I've played pump for years now and could never find the perfect marker. I tried sniper 2's which I like very much. I tried phantoms also. My new sterling fits me to a T.
-Accuracy = Equal to my sniper and better than my phantom
-Reliability = All equal. sniper, phantom & sterling are all well made markers
-Weight = Lighter than sniper and a little heavier than phantom but closer to phantom
-Pump stroke = Equal to sniper and much better than phantom
-Fit & finish = Better than both. Phantoms are known for high quality and the sterling is even better than my phantom which surprised me.
-Cons = You don't have to take the barrel off to adjust velocity but it makes it a lot easier and it is still a small pain but is easier than my phantom which always seemed to bounce around a lot before I would be able to get it tuned to 280.
-Plus - It has an auto trigger feature built in and is really slick. I am able to easily shoot 5 to 6 balls per second when needed.
This marker also comes with parts to change it from vertical stock class to vertical feed and bottom line.
This marker is everything I've been looking for in a pump marker. I can probably extend the handle on the velocity adjustment tool and then I won't have to remove to barrel to make the adjustment. The stock barrel is a little loud because it's not ported and is a heavy but I haven't had a marker yet that didn't need a new barrel. Other than that this marker is perfect and brings a smile to my face every time I use it. It's off to ebay for my other pump guns.
As close to a perfect marker as I've found. Could not be happier with my decision to get one of these. 10 out of 10 and would rate it higher if I could.