Build details
OCAW_MK11 HPA build details



Air nozzle Red Air Nozzle
Barrel Lapped 310 millimeter 6.03 stainless steel inner barrel with R-Hop patch
Bucking Modify Soft  
Electrical Polarstar FCU
HPA Engine Polarstar EMG Gen III, V2 Fusion engine
Hop-up UA x Maxx Model, Pro, hop-up chamber
Trigger Maxx Model adjustable trigger, Red type b, pre-tuned



Selector switch Retro Arms Red selector switch
Muzzle Orange tip installed, PTS Muzzle Brake 
Sights PTS Flip up sights
Stock MFT Minimalist Stock
Charging handle Ambidextrous Charging Handle 
Handguard Midwest Industries 10.5" M-Lok Combat Rail
Outer barrel Krytac 10.5" Aluminum outer barrel w/ 1" Angel Custom IBS
Receiver  Umbrella Armory OCAW AR receiver (VFC OEM)
Motor Grip PTS EPG-C with grip line


Battery Matrix 7.4 volt 250 mah lithium polymer battery, JST connector, brick type
Magazine PTS EPM 150 round M4 type mid-cap magazine 
Misc Polarstar manual, patch, sticker, VFC hardshell case
Choose a Color

High Speed, Ultra Light Weight

~3 Week Build time from date ordered.


OCAW HPA, built from the ground up with individually tested parts and modifications suited for high performance competitive use.
This rifle features the most advanced build set we have to offer, curated with zero compromise.


 Table information


  • Total length: 27"
  • Unloaded weight: 4.04 lbs
  • Barrel length: 11" 
  • Thread: -14 millimeter 
  • Handguard: Midwest Industries Combat M-lok Handguard
  • Battery: Brick type, JST, 2-cell
  • MFT Minimalist Stock
  • PTS Muzzle Device
  • Adjustable Maxx Hair Trigger (Pre Set)
  • Lapped, R-hopped, UA 6.01 280mm inner barrel
  • Gen 3 Fusion Engine
  • Programmable FCU
  • 1 year extendable warranty


  • Aluminum alloy receiver, handguard, outer barrel, buffer tube
  • Polymer motor grip, adjustable stock


  • Must be 18 years of age to purchase
  • Airsoft gun includes orange tip (not pictured)
  • Please view build details for items included as items pictured may not be included
  • Unable to ship outside USA

    Recommended BB Weights

    We prefer these weights for these muzzle velocities. For two main reasons. Best performance, and reliability. These BB weights will give the optimal range, and feed reliably. Going heavier than what is recommended may cause issues or PME if the magazine is not modified.

    450-500FPS = 0.36g-0.40g
    400-450FPS = 0.28g-0.36g
    330-350FPS = 0.23g-0.25g


    A tradition for zero comprimise. Each OCAW is carefully built from the ground up with the best parts and modifications.

    Everything we have installed within this build is integral for long term enjoyable performance; that we have built a tradition upon delivering to Airsofters.

    An enhanced rate of fire can change any player's game. Precise accuracy can make the game unfair. Extended range can render you unreachable. Increased durability will outlast the competition.

    Umbrella Coverage

    High performance care and extendable support to last a lifetime.

    For absolute peace of mind, this gun is sold with an initial full year of warranty coverage from the date it leaves our facility. This coverage is able to be extended annually for endless support.

    An included complementary service appointment to clean, and tune up this gun for prolonged care and after purchase support.