grazie a spettro che mi segnala questo nuovo gadget (gia' in vendita in quel di hk) a 90$:
- muzzle velocity measurement
- rate of fire measurement
- 6 memory slots for different bullet weight and caliber
- muzzle kinetic energy calculation
- energy per unit area calculation
- detachable aluminum hood
- tripod screw to fit camera tripod
- compact size ( 115 x 100 x 50mm )