AirTac Customs HPA CRBN Upper Color:Blue Black Rain Ordnance is a

Black Rain Ordnance is a true American success story

flip-up removable front/rear sights

M-Lok Rail System Mid length

Made of high quality components

Lots of velcro space on the helmet too

AirTac Customs HPA CRBN Upper Color:Blue Black Rain Ordnance is aHPA CRBN Upper: Lifetime Warranty for breakage defects CNC milled Carbon Fiber and ABS Polymer Genuine 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 G&G lower with a Maxx hopup Included Fiber Optics Rods (Green and Red) Available in Glossy Black, Matte Black, Red, Blue, Purple, Silver, and Gold tube colors Compatible with: Polarstar Fusion