The SD99 is similar to the very popular SD96 airsoft sniper rifle, but with more features and more power! This rifle is pre-upgrade to shoot 490-530 FPS with 0.20g BBs and has a metal trigger box. The gun also has and adjustable cheek rest and built in rear monopod. The SD99 also has a side folding stock, making it easier to transport and fit into your gun bag or gun case. Black Folding Stock w/ Stock Catch Metal Trigger Box Metal Fluted Barrel Metal Bolt w/ Full Metal Internals Trigger Safety Folded length: 36" Extended length: 45" FPS: 490-530 w/ 0.20g Recommended BBs': 0.25g+ Internals: Pre-Upgraded Metal Trigger Box, 500 FPS Spring, Metal Piston & Spring Guide Fire Modes: Bolt-Action, Single Shot Hop-up: Adjustable TSD 30-Day Warranty Features: Adjustable Monopod, Tactical Folding Stock, Scope & Bipod Mount Also included are (2) 22rd magazines, 2-Point Sling, Unjamming Rod, Bipod Adapter, BB speedloader, and a 3-9 x 40 metal scope with scope rings. Bipod Not Included. Please note:When assembling the gun, the retainer screws are built into the body of the gun.