Introducing the MCX Rattler, CO2 powered air rifle chambered in 4.5mm steel BB. This select fire air rifle accurately replicates the feel and function of its 300 Blackout counterpart with outstanding attention to detail. Slap in the full size magazine, rack the charging handle, flip the ambidextrous selector to burst mode and send three rounds downrange every time you squeeze the trigger. Featuring an internal blowback action, you ll experience felt recoil impulse on every shot adding even more realism to your shooting experience. Once the magazine runs dry, the bolt will lock back requiring a realistic reload sequence by either depressing the bolt release or cycling the charging handle to return the bolt to battery. No matter if you are looking for a realistic training tool or a fun backyard plinker, the SIG SAUER Rattler BB air rifle is sure to deliver. Product Features Semi-automatic and 3 round burst firing modes. Internal blowback action generates felt recoil impulse. Functional charging handle and bolt catch allow for realistic reload drills. Ambidextrous fire selectors and magazine release. Full size 30rd magazine houses 12g CO2 cartridge. M-LOK accessory rail and full length Picatinny optics mounting deck. Fully adjustable, flip up sights. Product Specifications SIG AIR Reflex Sight Ready: No Accessory Rail: M-LOK Operating System: CO2 Sights: FLIP UP FRONT AND REAR SIGHTS Stock Type: Folding Minimalist Caliber: 4.5mm Steel BB Mags Included: 30rd Drop-Free Magazine Overall Length: 23.63 in (600.2 mm) Muzzle Velocity: 300PFS CO2 Cylinder Size: 12gr Weight: 4.6 lbs (2.1 kg)