AirTac Customs GEN 4 HPA CRBN Upper -128mm -Red

AirTac Customs CRBN Upper – 185mm -Silver -HPA Monk Version Revamped framed design for a sleek new look, compatible with Monk Customs Lowers CNC milled Carbon Fiber and ABS Polymer Threads and Sights Genuine 3K Twill Carbon Fiber tube Fiber optic front and rear sights for fast target acquisition Dual hopup windows for on-the-fly adjustments Perfected drop-in fitment on a Monk lower with a Maxx hopup Included Fiber Optics Rods (Green and Red) Gel Blaster use only