The SPIDER Kit includes the SPIDER adapter for any airsoft pistol with picatinny rails, and your choice of either a red (visible) or IR (invisible) SureStrikeTM Vibration Cartridge! Get more bang for your buck and now train with any of your favorite airsoft guns, as SpiderKit device can be removed and installed time and time again! Maintain your shooting skills: practicing your stance, gun presentation, sight alignment, sight picture, breath control, trigger pull, and follow through while experiencing recoil for a more realistic training session. The SPIDER only works with blowback airsofts, does not work "spring loaded" airsoft guns. Airsoft gun not included.