Okay, so I bought a Javalin M4 project gun for a REALLY great price a while back, and got it up and running for a while, but the gearbox is just not cutting it. I have had too many non standard parts failing to even bother trying to fix it anymore. So I was looking into buying a drop in gearbox, and swapping over some of my upgrades. I saw a sweet quick change spring gearbox, and I keep thinking how cool that would be for an M4, since I could build it up as a high ROF field gun, swap the spring, and run it in CQB. Well, I cant find much info on the gearbox, but what I have found looks pretty good Some minor little things like a micro switch instead of the standard trigger contacts, that can be prone to early failure, and cheaper piston and whatnot, but most of the problems will be fixed with my upgrades. So here's the questions;
1. Will it even fit in the Javalin Metal body?
2. Do you think its worth it to get the relatively unknown gearbox for the features?
3. If not, what drop in replacement would you recommend within the same price range?
Any info you might have would be awesome too!
Here's the link to the Gearbox I'm looking at:
http://www.khmountain.com/airsoft/produ ... ts_id=2960