Umbrella Armory



Build details
UA_MBR308 build details



Air nozzle G2 air nozzle with o-ring
Anti-reversal latch G&G anti-reversal latch, spring
Barrel Lapped 460 millimeter Prometheus 6.03 EG inner barrel with R-Hop patch
Bearing Umbrella Armory 8 millimeter steel caged bearing set
Bucking G&G green, flat hop modified
Cylinder Stainless steel 1/1 full cylinder
Cylinder head CNC double o-ring cylinder head
Electrical Perun ETU++ (rear-wired), G&G ETU trigger board 
Gears 18:1 SHS; SSG, 10 tooth bevel
Gearbox shell G2H V2 style gearbox shell
Hop-up G&G rotary style unit with UA flat arm
Motor Warhead Industries brushless base motor
Piston SHS FMR piston
Piston head Lonex polyoxymethylene piston head
Spring ASG steel spring M135 
Tappet plate G&G tappet plate
Tappet spring G&G tappet spring
Trigger Black G&G ETU trigger



Battery Matrix 11.1 volt 2000 mah 20c lithium polymer battery, butterfly type
Magazine G&G G2 MBR308 40 round mid-capacity magazine
Sights Flip up sights
Misc PTS EPS stock, Perun programming card manual, unjamming rod, patch

Choose a Mission

1-3 week build time

Upgraded G&G MBR308 (M-Lok) AEG, equipped with individually tested parts and modifications suited for high performance competitive use

500_FPS (.2g) 26_RPS (12.6v) 37_MS (12.6v) 275_FT (.4g)

 Table information


  • Total length: 33.7 - 37 inch
  • Unloaded weight: 6.7 pound
  • Barrel length: 18 inch
  • Thread: -14 millimeter 
  • Handguard: 16 inch, M-Lok
  • Battery: butterfly & stick type, Deans, 3-cell
  • G&G G2 .308 style magazine
  • Black Skeletonized speed trigger
  • R-hop 2.0
  • Programmable ETU / MOSFET
  • 1 year extendable warranty


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


  • 1-3 week build time
  • 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