@fortris 1” at 50 yards is pretty darn good, but not necessarily as accurate as you want it.
Do I see barrel rifling dimensions there? Very cool. That would account for the excellent accuracy, however you’re going to loose range very quickly without “Hop Up.” Expect a lot of drop in your shots above the effective range. It should shoot pretty straight, but without more power than is legal, I don’t think it’ll hit the target accuracy you’re looking for.
At 850 ft/s you’ll get a drop of about 3.5 feet at the 400 ft range without “Hop Up.” This is why “Hop Up” was created. Because airsoft guns have to shoot at a limited FPS you must trade accuracy for range. Technically you could be fairly accurate at 400 ft with the gun you posted, but you would have to sight in for a 3.5 foot drop and if you did that it would be demonstrably inaccurate at ranges between the effective range and the range you want to hit (this is why effective ranges are manufacturer specified).
I definitely like that it’s CO2. It’s a heck of a lot easier and cheaper to get than green gas as well as a heck of a lot more powerful. I don’t think I’d like the absence of a stock but since it claims there’s “no recoil” I guess it’s not that important. (Technically anything that fires a projectile has recoil, the only reason they state this is because the projectile you’re firing weighs next to nothing so the recoil is nearly nonexistent.)
@kibaxcheza Yes, a heavier projectile will have more inertia and thus be less easily accelerated by aerodynamic forces that a similarly shaped object of lighter mass would also be exposed to. However, the impulse provided by a gun is relatively constant regardless of the projectile weight you choose so the heavier the projectile, the less muzzle velocity the projectile will have. What you want to do is maximize the momentum in the projectile, while ensuring you stay within regulations and maintain good accuracy. This is pretty hard to do. If you get a rifle that shoots lighter BB’s at above 1000 FPS replacing them with heavier ones can bring the muzzle velocity within regulation ranges.
The best you can possibly get is a rifled barrel gun that can shoot the regulation maximum weight at the regulation maximum FPS.