First off let's get the fact that the Cybergun Sig Sauer SP2022 Sportline CO2 Airsoft Pistol is not going to win any awards for true to scale weight and materials used in its production. This Airsoft pistol is virtually all plastic with the exception of some internal metal parts. It weighs next to nothing but that could actually be a good thing if you don't want a heavy sidearm dragging you down on the field. Once you are all geared up with your primary weapon and all it's extra magazines and what not. And of course you are probably covered head to toe in some sort of tactical uniform, why drag yourself down even more with a heavy sidearm and all it's heavy backup magazines? Just a thought!
What's really important is how does the Cybergun Sig Sauer SP2022 Sportline CO2 Airsoft Pistol actually perform? Well really good for an inexpensive pistol and since there is no blowback operation you are going to get a lot more shots per CO2 and higher fps.