UA CYMA Platinum M4 10.5" Carbine

Type: Gun
Trigger Type

4-6 Weeks Build Time

We upgraded this rifle because, we noticed a few issues we wanted to address and improve. First the AoE is no where near corrected. During stress testing this was considered a fatal flaw as excessive damage could be seen on the pickup tooth of the piston, eventually leading to its failure. Though CYMA got many things right with this platinum series of gearbox, we also did see areas where we considered to be cutting costs unnecessarily. "Low profile" bearings should -always- be avoided whenever possible, as they rate about 33% weaker than normal.
CYMA had an odd choice with their sector gear. We noticed some excessive FPS drop off due to the sector/tappet timing being off. Here at Umbrella we specialize with high ROF builds and this is no different, our specific modifications allow for accurate fire in either Semi or Full Auto fire. This build was taken with extreme testing, over the course of a couple weeks of semi and full auto fire in our range. It was then opened, cleaned, regreased and closed again.

We did notice some excessive inconsistency between the MOSFET, some would work yet most of them gave odd issues when paired with a brushless motor. As a result, we opted for the Perun Hybrids to allow for advanced features with low resistance wiring.

Internal Upgrades:

Perun Hybrid V2 MOSFET
Warhead Brushless Motor
Prometheus 6.03mm 310mm Lapped R-hop 3.0 Barrel w/ M-nub**
UA 8mm Caged Bearings 
Maxxpro Red trigger (Pre-Tuned)
SHS 13:1 Sector Gear Short Stroke 3
CNC POM Air Nozzle w/ O-ring

Wired to Deans
Comes with 1 150 rd Midcap Magazine

Performance Specs
33+ RPS w/11.1v Lipo 
395 FPS +/- 1.5  w/0.20g BB