G&G Piranha SL GBB Pistol (Silver)
1:1 Ratio realistic gas blow back airsoft guns pistol
Gas Blow Back Pistol with Semi-Automatic Shooting Mode

Interesting split slide, sight tracking style design
As the gun shoots and cycles, only the rear half of the slide moves, keeping the front sight affixed on any potential target for better tracking. 
Front & Rear Sight
Accessory Rail on the Bottom for the Mounting of Flash Lights and Lasers
Metal 25 Rounds Loading Capacity Magazine

Adjustable Hop-Up