Airsoftjunkiez are ready to provide you with a custom Krytac CRB MK2. The Airsoftjunkiez Custom Krytac CRB MK2 HPA gives you the choice of HPA engine to drop in to the CRB body. This will be configured from 300-500fps on 0.20g BBs with an an ROF of 20-33 BBs per second. Pricing will depend on the full HPA rig you want to go with it and accessories are not included.