UA CYMA Platinum M4 13" DMR
**3 Week 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.
- Perun Hybrid V2 MOSFET
- Warhead 30000 RPM Brushless Motor
- Prometheus 6.03mm 387.5mm Lapped R-hop 3.0 Barrel w/ M-nub**
- UA 8mm Caged Bearings
- Maxxpro Red trigger (Pre-Tuned)
- SHS 13:1 Gearset (Retuned Sector Timing)
- CNC POM Air Nozzle w/ O-ring
- 22 RPS w/ 11.1v Lipo
- 495 FPS +/- 3 w/0.20g BB
- PTS EPG-C
1x UA CYMA DMR 13" MLOK
1 "M" Style Midcap Magazine
Batteries NOT Included
Will Ship with Orange Tip