If any semiautomatic air rifle can be called exciting, it's the Beretta Cx4 Storm from Umarex. This rifle is powered by an 88 gram CO2 cartridge and uses a belt type 30 round magazine. The Cx4 Storm features a two stage trigger and can fire .177 caliber pellets at up to 600 feet per second.
Specifications and Features:
30 shot auto advance belt magazine, replica of Cx4 Storm Firearm
.177 caliber pellets
Semi auto action
CO2 power
30 round capacity
17.5 barrel length
Manual safety
Rifled barrel blued finish
600 feet per second
30.75 OAL