None really needed. It's a complete package.
2-Point Gun Sling
Ease of maintenance
Rate of fire
Special Ops promised the ultimate sniper marker. Given my experience with my new Q-Bow (Longbow with Q-Loader), I believe they have delivered. Special Ops mentions a lot about the ergonomics of this marker. They certainly do not lie. This gun snaps to your shoulder with lightning speed. Its balance point is also good, between the rear and front grips, even with a full Q-Pod up front. The gun is a little heavier than a 98 Custom with one of their stocks, but not significantly. It feels rather compact despite its length. I do recommend getting a gun sling, though. Even with my 98, a sling was a lifesaver.
My normal target for determining accuracy is a 2 inch steel pole at 30 feet. The 14" CP Classic barrel they provided does its job well, at least with the Karnage Tear paint I was using. With this gun, I was able to hit the pole most of the time I fired at it, and the shots that missed did so by only an inch or so. In paintball, it's accepted that there will be some variation between shots. It's the width of the variation that determines accuracy. With my 98 Custom, I was pulling a 3 inch variation from the pole, compared to the 1 inch here. Given that I was using a premium barrel on the 98, I attribute the increase in accuracy to the gun itself. What truly impressed me was when I tried a rapid fire. The light trigger pull combined with the stock meant that it was just as accurate when walking the trigger as when firing single shots. That was something my Tippmann could never have come close to.
Someone reported that maintenance on this marker was a bit of a problem since it required removal of the Special Ops hardware in order to get to the guts. This is actually not true, and I discovered this the first time I went to work on it. The Longbow shroud is only attached to the mainbody, and the rear stock is attached to the shroud via spring push tabs. It can be released in under 30 seconds. The base marker for the Longbow / Q-Bow is the Airgun Designs Tac One. Like all Automags, the valve and all of the gun's guts can be removed by simply removing the field strip screw at the back of the grip. Simply remove the screw, and pull the guts out the back of the gun. Then a crescent wrench can be used to open the power tube for Level 10 maintenance. You can take the gun apart, perform maintenance, and reassemble it again in 5-10 minutes, and the work involved is paintless; no spring-loaded parts to deal with. Compare this to 30 minutes for Tippmann 98 maintenance.
In conclusion, Special Ops certainly delivered on this product. The gun is well-made, and lives up to all their promises. If you get the Q-Bow, it can be used for longer scenario games more effectively. If you have the money, and want to play sniper or just want the best gun with a stock you can buy, this is it.