It's probably a tad under that, but the stealth/talon type rifles are known for their high performance thanks to an extremely efficient inline valve - coupled with a long barrel I don't think the specs quoted are too off the mark. Remember though that manufacturers/enterpreneurs (particularly in the US where velocity sells) do tend to use unrealistically light projectiles (whose weight they do not quote in their brochures) in order to be able to advertise the highest possible velocity.