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AirTac Customs | GEN 5 HPA CRBN Upper
AirTac Customs - GEN 5 HPA CRBN Upper The HPA CRBN Uppers feature dual hopup windows, fiber-optic front and rear sights, perfect fitment, and CNC aluminum parts. All for the same price! All uppers are cross-compatible, so you can swap your tubes and parts between any of your CRBN uppers! ...
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