40mm CO2 airsoft grenade maintenance.
 

Hello all,

I have decided to expand my armoury to include some Mad Bull CO2 powered 40mm airsoft grenades. The one's I ordered came earlier this week. WOW! I look forward to a lot of different fun next season.

I have come across several discussions about the necessity for properly lubing and maintaining such grenades in order for them to work properly (not leaking is the biggest concern), but not a definitive "how to".

I used the search engine here and Google. If there is such info already that I did not find using my parameters then please point me in that direction. Otherwise an explanation of where to lube, with what, and how often, as well as how to store for the winter would be most appreciated.

Thank you.

I have yet to do much lubing. aside from applying a small amount onto the orings, there's really not much else to do.

as long as you don't fill to 700+ psi with CO2 on a regular basis, you can go a while. if you fill higher like a few of us do, instead of lubing, you'll just need a new valve and maintenance (oring) kit.

try to keep them clean. that's all there's to do with them.

which madbull nades did you get? only a few of them actually take CO2 over 400psi and aren't near impossible to trigger. xm108hp, xm204hp and xmpb4's are the only ones I know of that can handle 900psi, fired several times before requiring a new valve or orings, and are triggered with little effort.

I bought one xm204hp and one xmpb4 to see what they were like. I plan on using 600psi, which is high, but not too hard on things as I understand it.

yeah. I use those.

the kings are pure intimidation cause people know they can reach out and touch, well a little more than touch someone. often I'll go up to 700-900psi. harder on the nade but the giggles I hear all around me when I fire them is reason enough. lol

the pb4's are great. I just fill with 50 or so BB's and use a tissue wade to hold them in place. with the co2 charger on cartridges, it's super easy for a tactical reload. carry the charger, small jar or bag of crap BB's and a few pieces of tissue.

400-600psi is plenty. more is more fun but under 6 is safer for longevity.

yeah at full pressure 900psi you need to heave the shit out of the trigger before it discharge, I almost broke my middle finger at a game once trying to lauch a full pressure Kings nades

that is the fault of the madbull launcher. there is no leverage on the trigger as it's just an extension. the agx was beautiful for 900psi.

the pressures that you're planning on running are fine. it takes some fairly ideal conditions to get anywhere close to 900 psi and shoudl you actually get that high than be extremely cautious handling them...dont look directly at EITHER end of the grenade cus they can be a bit touchy after 800 or so. i once had a 40mm mortar from one that was between 850-900ish. normal charging conditions will typically be no more than 800psi though and they're stable at that pressure.

i cant speak for the multipurpose ones but for the 204's and 108's, you're primarily worried about keeping 2 o rings lubed. there's the small one on the cone valve and the one in the threaded cylinder that the valve sits in. basically a threaded sleave with 2 holes to unthread with.

what lube? i use rc shock oil but any o ring friendly silicon lube will do the trick. the purer the better. dont be afraid to be generous with the lube cus it'll shorten the lubing frequency.

i can tell you that those of us posting in here right now run 800 psi regularly and lube about every other game day or so...ultimately it's best to clean and lube after every game day but that's totally up to you. if you find yourself having a bit of difficulty charging than the odds are that he rings may be a bit dry and not seating properly so the first thing you do when it doesnt gas up properly is check those 2 rings. be carefull cus the tolerance for the ring on the valve can get nicked and need to be replaced. the smallest nick and it's over.

all those nades are wicked though...we've got like 50 between the 3 of us...hahahha...

oh...dont fire the multipurpose nades too close to someones head. they actually hurt the ears more than any of the others. ear piercing actually.

one of these days, we'll need to play a game, hunkered down with the 50 nades, betsy 1 & 2, thumper, gojira, whatever GBBR's are aquired by then and the shotty's. Hold the fort anyone? hahahahaha

maybe Carl will have the launchable 40's by then too. LOL

aww, I remember popping the multi's and stunning both you and wildcard. :D at least I know that one of them was a confirmed kill in the dark. should have got your head out of my way. I think I said 'firing' on one of those occasions. hahaha

you fire that multi p nades again especially when i'm within three feet i'll introduce you to Godzilla myself, you are lucky I was not wearing a helmet that shit could be twice as loud

yeah I know, but I have no launcher ATM so you're okay.

Are you guys just buying the O-ring kit from Airsoftparts.ca? Or, do you have an online source for bulk purchase of those O-rings (and, favour, could you provide links for the exact ones required, 'nades are the Madbull multipurpose and the high-power 204's).

Have you ever tried silicone grease instead of oil? Something with enough viscocity to actually 'stay' there?

Oborous

use a dab of grease to hold the bearings in place? other than that use oil.

we get the maintenance kits extra orings and bearings from jugglez at airsoftparts

you'll need 2 seperate maintenance kits for your differant nades since the cone valves are VERY differant....like comparing a shovel head to a spade. jugglez has both kits. alternatively you can always check with your local r/c shop with samples of what you're looking for to see if they can find you matching bits.

I personnally no longer use CO2 in my madbull grenades. Being a former paintball player, I fill mine up with high pressure air (HPA) (around 800 PSI). HPA is much more stable then CO2, so perfect for winter games. Also HPA is easier on the O rings since you dont have the cold blast of air made by CO2.

That makes me think, Would regulated HPA be any good in GBB's to combat the cooling effect?