You are looking at a Select Fire (Fully Automatic AND Semi Automatic) Full metal gas blowback! This is one of the most popular Gas Pistol in Airsoft history giving that it is an M9 tactical, full metal and shoots Full auto!
The draw back of a full auto pistol is that it has a wear and tear part (Part #30) just like your car tire that you will need to replace through out time. However, it is still one of the most popular gas pistol. if you set the selector at semi-automatic, it will fire just like a standard Airsoft Gas pistol. It is always good to have the extra full auto feature (holding the trigger will enable the gun to fire until you empty the mag like an mini blowback AEG!). The Full Auto Feature made this gas gun one of the ultimate side-arm.
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