Skip to content
DUE TO HIGH SHIPPING VOLUMES, WE ARE UNABLE TO GUARANTEE DELIVERY PRIOR TO DECEMBER 25TH. EXPECTED SHIPPING DATES ARE AN ESTIMATE
DUE TO HIGH SHIPPING VOLUMES, WE ARE UNABLE TO GUARANTEE DELIVERY PRIOR TO DECEMBER 25TH. EXPECTED SHIPPING DATES ARE AN ESTIMATE

AirTac Customs HPA Monk CRBN Upper

Pre-order
Original price $149.99 - Original price $149.99
Original price
$149.99
$149.99 - $149.99
Current price $149.99

Want to use an AirTac CRBN Upper on your Monk Customs Lower? Look no further!

CRBN Uppers are a sleek way to turn any Monk Customs build into a lightweight beast, made with genuine carbon fiber for strength and durability.

The Monk Upper features dual hopup windows, fiber-optic back sights, perfect fitment, and updated threads. Plus, a revamped design to match the aesthetics of Monk!

All uppers are cross-compatible, so you can swap your tubes and parts between any of your CRBN uppers! 

This AirTac Monk HPA CRBN Upper Features:

AirTac Monk HPA CRBN Upper:

  • 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)
  • Available in Gloss Black, Matte Black, Red, Blue, Purple, Silver, and Gold tube colors

Compatible with:

  • Polarstar Fusion Engine (Drop-In)
  • F2, Jack, Inferno, N7, Pulsar etc. (Requires CRBN Gearbox)
  • G&G polymer (SSG1, ARP9). Metal (ARP556) and Lancer Tactical lowers (drop in fitment, has a gap)
  • Monk Customs lowers (drop in fitment)
  • MAXX Hopup Chambers (ATPRO, M4P, M4A) and Retro Arms hopup chambers (drop in)
  • G&G Stock Hopup, Lancer Tactical Stock Hopup, Prowin Hopup (With modifications)
  • AirTac Customs CRBN Gearbox
    Inner Barrel Length: 128mm
    Color: Purple

    Delivery time

    Use this text to share information about your product and policies with your customers.