Video from Airsoftjunkiez.com showing Krytac Trident SPR installed with the Redline N7 Milsim Kit. The N7 Milsim Kit is a semi-auto, drop-in cylinder replacement that has a forward biased nozzle and fires from a true closed bolt. This can be converted from mechanical/pneumatic to standard electro/pneumatic N7 with an optional conversion kit. This kit will most version 2 AEG gearboxes without modification.