AirTac Customs HPA CRBN Upper Color:Blue High tolerances for the 6

High tolerances for the 6

This is the popular size for longer M4 airsoft guns

One of the best desert tan M4 airsoft guns made

03mm diameter)

Inner Barrel: 475mm

AirTac Customs HPA CRBN Upper Color:Blue High tolerances for the 6HPA 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