The AirTac Customs CRBN Gen 2 is here! They are a sleek way to turn any build into a lightweight beast, made with REAL carbon fiber for strength and durability. The ABS Gen 2 sports multiple upgrades! We've changed the threads and nylon of the uppers and they're now much stronger! They are now made of impact-resistant ABS polymer, and available in a multitude of beautiful colors. We've also added a fiber-optic front sight for faster target acquisition. All uppers are cross-compatible, so you can swap your tubes and parts between any of your CRBN Gen 2 uppers!  AirTac Customs ABS CRBN Upper Gen 2: - CNC Machine milled to perfection - Upgraded ABS polymer front sight and thread piece - Included Fiber Optics Rods (Green and Red) - Available in Glossy Black, Matte Black, Red, Blue, Purple, Silver, and Gold tube colors - Real lightweight carbon fiber Compatible with: - Polarstar Fusion Engine (Drop In) - Any V2-compatible HPA engine (F2, Jack, Inferno, N7, etc.) (Requires CRBN Gearbox) - Designed for G&G polymer lower receivers (SSG1, ARP9). Fitment possible with Monk Customs and EMG F1 lowers.  - CRBN Uppers are EXCLUSIVELY compatible with MAXX Hopup Chambers (ME, M4P, M4A) - AirTac Customs  CRBN Gearbox (Link->https://airtaccustoms.com/products/airtac-customs-crbn-gearbox) - some fitment may be required.