Opened the box, and was pleasantly surprised to find a foam-filled plastic case, which housed the rifle. There are cutouts for clearance for a tall red-dot scope, or other sighting appendages. My Walther PS-22 Red Dot Electronic sight didn't arrive, so can't review that.
One word of caution, right out of the box. The recoil pad removes to gain clearance to the Airsoft 88G CO2 receptacle. I installed the recoil pad, and promptly tried to hand the rifle to my wife for inspection, when the recoil pad slipped out of its snaps, causing me to lose grip on the rifle and hit her shin with the picatinny rail mount, which left nasty abrasions and cuts. We were both sitting side-by-side. As shipped, the recoil pad does not not lock solidly to the butt. I'm going to have to stress the recoil pad snap locks outward, so it locks. An unfortunate preventable incident, that I won't repeat. I normally hand any rifle to someone after checking empty, and safety on, by holding the rifle by its handgrip and forearm, and holding it straight out at a 45 degree angle. I held the recoil pad this time, unfortunately.
I have been forgiven, for now...
...on to the impressions. The fit and finish of this rifle are first-class. It looks, and feels like a quality piece. The weight also gives it that well-machined feel. At no time, did I think the CX4 looked, or felt "cheap", until I removed the closed-loop conveyor (clip) for the pellets. While it does use cheap, flexible plastic for the conveyor belt and pellet cylinders (30 pellet clip), it does a remarkable job of feeding the CX as fast as you may pull the trigger. The most unique feed mechanism I've seen, and it works flawlessly, but (and it is a big but) replacements are 25 bucks a pop, and you will need at least two, as this thing goes through pellets and CO2 faster than anything I've had the joy to shoot. I personally feel that the 25 buck tag on extra clips is steep, but nobody asked my opinion on that yet.
It was dark when I finally got a chance to shoot the beast, and it shoots as butter smooth as it looks. Recoil is non-existent, and the blowback action is buttery, as well. There have been reviews from owners that stated that it loses lots of air around the handgrip, implying that it "leaks", but this is blowback exhaust, which is completely normal. Some have complained about heavy trigger action, but it is not bothersome, to me at all.
The rifle is much better made than the NightStalker, and for the difference in price, it better be. No time to chrony or give other technical opinions, and will probably wait until the scope arrives, and several hundred pellets flung for a detailed report.
Oh! Almost forgot! The rifle may be "uncocked", a desirable safety feature.
You may consider this rifle as a long barreled pistol, with stock permanently attached. It's short, mean looking, and quality-built.
Charles