Just curious. What gearbox does the EBR-14 run? The description says full auto only but it doesn’t look like a gen 8 box would fit.
Pic from ihobby listing
Yep… it’s a typical nylon shell BF inline box like the P90. 460 shortie motor if memory serves.
Runs all standard Gen 8 upgrades though. Mine’s running SHS metal internals and an M100 spring, sits around 320FPS. 
Not a bad option for a DMR if you can live with the lack of select fire. 
They were basically the same as the p90, but the gears and motor went towards the rear rather than to the front of the gearbox, making it long and slim.