m4 upgrades

Looking to upgrade my m4 by echo 1,has the 8mm gearbox, I suppose the gears can handle a lipo according to their high stress video test. Now I need accuracy, I know I might need a better air seal, hop up unit, and barrel also a spring because I want mid 400's fps

Experienced people post up a link, to pieces to achieve the aforementioned, best priced stuff. Total cost posted would be appreciated as well.


We should setup a nice section with stickys for upgrades, parts and pricing and what the part does in detail. Thank you guys. [i]

go to evike.com and get an scs hop up nub and a systema bucking


couple that with a madbull tightbore barrel and youll be doing great

plus that whole thing only costs a total of 42 bucks

Roger, as soon as I get rid of my AK its on!

send me a PM, you wont regret it.