Not for long.
Without a mosfet, an 11.1v Li-Po will wear down your trigger contacts relatively quickly. Additionally, you'll want to install better wiring (16awg) and replace the Tamiya connectors with Deans connectors.
Also, the clear/blue tinted polycarb piston that comes stock in VFC guns isn't the best. The additional ROF that you'll achieve running a Li-Po battery will cause that piston to fail faster.
Install a mosfet, new wiring, deans plugs and upgrade your piston and you should be good to go, to my knowledge.
I am currently in the process of overhauling my VFC collection. Feel free to send me a PM if you have any questions.
Last edited by Anvil; May 21st, 2015 at 20:59..