DXK AAP-01 Upper

The DXK AAP-01 Upper designed and manufactured by Keystone Customs in the USA The purpose of the DXK upper was to create a fully functional upper correcting some of the issues our team had found with the uppers currently available on the market.  These main features include: - Suitable barrel lengths 94.5mm (4.3 hi capa) - 130mm (with threaded adapter). - Adjustable hop-up access without removing upper. - RMR mount that does not need to be removed for maintenance or repairs. - One piece design. No barrel stabilizers or extra screws needed. - Lower Picatinny rail for lights and other accessories. - Works with all available aftermarket bolts - Reinforced suppressor height sights included - Printed in cost efficient, super-high strength, resin making it available to players on a tighter budget   **Limited Edition Colors are limited to 20 per color and are numbered** **Crystal Edition Uppers come with an exclusive Killhouse Customs patch**