Madbull 40mm nade issues (Updated with pics)

VooDooPeteK · June 29th, 2011, 13:56

OK so this is my first experience with madbull nades and I have to say I am not impressed.

So normally I have used/dealt with KA or similar 40mm nades but I decided to try some of the madbull ones but wish I didn't

Issues: After a few shots with each of them they stopped resetting. I took them apart for cleaning and whatnot but now the trigger pin/button does not fit back into the grenade shell base. This is happening on all 3 that I bought together and think I might just have a bad batch but if anyone has had this problem and knows a fix I am ready to listen.

Thanks

Pete

*** UPDATE ***

Ok so I got a chance to take a few pictures to show that part that I can't seem to get to fit now.

Picture 1 - all the parts from the shell
Picture 2 - The part that will not fit into the bottom shell half
Picture 3 - Where the part is that's where it stops when putting it back in and will not go down any farther

Styrak · June 29th, 2011, 14:26

Are they CO2 or were you using CO2 with them?
CO2 can be hard on grenades, even the ones made for it. I know metal parts inside can deform with use.

voorhees -FWA- · June 29th, 2011, 14:46

You can try to just loosen the shell from the shell body; unscrew it until it resets then screw it back together. I also pull the shell from the shell body, like I'm trying to pull it apart while I'm uncscrewing it, this seems to work best. Obviously you've had these apart before and you don't need me to tell you not to screw it out too far as the bearings will fall out into the shell...

coach · June 29th, 2011, 16:56

Quote:

Originally Posted by Styrak

Are they CO2 or were you using CO2 with them?
CO2 can be hard on grenades, even the ones made for it. I know metal parts inside can deform with use.

MB CO2 nades will not deform after a few uses. We have plenty used at very high psi on CO2 that don't require a rebuild for many more uses than a few.

OP, which nades are you using? What gas are you using?

Make sure all the bearings are in place. use a bit of silicone grease to hold them. lube the orings and try again.

Resetting madbull nades should be as simple as poking a screwdriver in to the back until you hear a click.

wildcard · June 29th, 2011, 18:44

Quote:

Originally Posted by VooDooPeteK

OK so this is my first experience with madbull nades and I have to say I am not impressed.

So normally I have used/dealt with KA or similar 40mm nades but I decided to try some of the madbull ones but wish I didn't

Issues: After a few shots with each of them they stopped resetting. I took them apart for cleaning and whatnot but now the trigger pin/button does not fit back into the grenade shell base. This is happening on all 3 that I bought together and think I might just have a bad batch but if anyone has had this problem and knows a fix I am ready to listen.

Thanks

Pete

I have 60x Kings and 60 Cherries the only issue I have with them are teh top oring that keep the bbs in often get blown out at high pressure (650 - 800psi) on CO2, take them apart chances are your bearings (4 of them ) are probably knocked out and if that's the case get some silicone grease and reset them in place some MB nades do have dried up grease which cause the bearings to fall out and therefore it's not possible to reset them. Like coach said these things will not deformed the only one I have that deformed were the top of holes on the the nades but that's after dropping the on gravel several time. some pics might help.

VooDooPeteK · June 29th, 2011, 20:23

they are the Mad Bull 120 rds M922A1 BB Shower

I will try and take some pictures in the morning when I am home from work to show what I mean but its the part that you push in to set grenade off that will not fit back into the base of the grenade.

coach · June 29th, 2011, 20:31

are you using CO2 or propane? the M922A1's aren't made for CO2. I mess one up with CO2 at 600psi.

is it stuck or does it just not return all the way to firing position?

anyway, pull it apart and inspect it for flaws or damage. ensure you replace all the bearings and that they stay in place. when resetting, use something with a point that you can insert into the little hole and wiggle it a bit as the spring pushes it.

VooDooPeteK · June 29th, 2011, 20:46

Using propane ( I do also have co2 ones that I have been using but with these ones propane)

I pulled them apart and inspected them but can't see anything that would cause the part not to be able to be pushed back into place.

Jugglez · June 29th, 2011, 20:51

The valve spring pushes the pin against the base, is the valve spring still there? if so is it bent or misaligned?

VooDooPeteK · June 30th, 2011, 16:28

ok so I updated the OP with pictures and a bit of explanation to the pictures and the problem

Normally I would just buy i rebuild kit but both parts that seem to be the issue (one or the other or maybe both) you can't buy on there own

wildcard · June 30th, 2011, 16:45

Based on my Kings and cherries set up the spring sits between the pressure valve (the big one) and the push pin valve, now the last picture looks like as if the spring was not installed and that you didn't screw the body in far enough. The big pressure valve shoul pop into the chamber (that's how you reset it) and your bearings need to be in teh big pressure valve

coach · June 30th, 2011, 16:50

can you manually/physically insert the push pin valve into the hole in the base with it open?

VooDooPeteK · June 30th, 2011, 17:03

Quote:

Originally Posted by coachster

can you manually/physically insert the push pin valve into the hole in the base with it open?

No I cant I can push it as far as it shows in the 3rd picture

reason I didn't show the spring/bearings and top plunger thing installed is that stuff goes together just fine its the push pin valve that will not go into the base with everything installed or without.

I know with my king arms if I have them fully apart I can just drop this part in

coach · June 30th, 2011, 17:19

Talk to who you bought them from and see if you can exchange them.

Jugglez · June 30th, 2011, 17:31

Make sure you are centering the spring into the valve, there is a recessed ring in the valve where the spring sits in. If the spring is even a bit crooked to one side it will create this problem.

I'm not sure how else this can happen, especially given everything was fine out of the box and u used it a few times.

If you continue to have this problem you can email me directly

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June 29th, 2011, 13:56	#1
VooDooPeteK Trader rating Join Date: Feb 2010 Location: Thorold, Ont	Madbull 40mm nade issues (Updated with pics) OK so this is my first experience with madbull nades and I have to say I am not impressed. So normally I have used/dealt with KA or similar 40mm nades but I decided to try some of the madbull ones but wish I didn't Issues: After a few shots with each of them they stopped resetting. I took them apart for cleaning and whatnot but now the trigger pin/button does not fit back into the grenade shell base. This is happening on all 3 that I bought together and think I might just have a bad batch but if anyone has had this problem and knows a fix I am ready to listen. Thanks Pete * UPDATE * Ok so I got a chance to take a few pictures to show that part that I can't seem to get to fit now. Picture 1 - all the parts from the shell Picture 2 - The part that will not fit into the bottom shell half Picture 3 - Where the part is that's where it stops when putting it back in and will not go down any farther __________________ http://www.gorillaairsoftradio.com/ Great Airsoft Podcast Gun tech work, Parts, Upgrades and anything else you might need http://www.fortythievesmcnation.com/ Support your local 1%er Last edited by VooDooPeteK; June 30th, 2011 at 16:26..

June 29th, 2011, 14:26	#2
Styrak Trader rating Join Date: Jan 2007 Location: Saskatoon, SK	Are they CO2 or were you using CO2 with them? CO2 can be hard on grenades, even the ones made for it. I know metal parts inside can deform with use. __________________ Airsoft Sales and Repair/Upgrade Services

June 29th, 2011, 20:23	#6
VooDooPeteK Trader rating Join Date: Feb 2010 Location: Thorold, Ont	they are the Mad Bull 120 rds M922A1 BB Shower I will try and take some pictures in the morning when I am home from work to show what I mean but its the part that you push in to set grenade off that will not fit back into the base of the grenade. __________________ http://www.gorillaairsoftradio.com/ Great Airsoft Podcast Gun tech work, Parts, Upgrades and anything else you might need http://www.fortythievesmcnation.com/ Support your local 1%er

June 29th, 2011, 14:46	#3
voorhees -FWA- Trader rating Join Date: Oct 2008 Location: Estevan, Saskatchewan	You can try to just loosen the shell from the shell body; unscrew it until it resets then screw it back together. I also pull the shell from the shell body, like I'm trying to pull it apart while I'm uncscrewing it, this seems to work best. Obviously you've had these apart before and you don't need me to tell you not to screw it out too far as the bearings will fall out into the shell...

June 29th, 2011, 20:31	#7
coach aka coachster Trader rating Join Date: Mar 2008 Location: T dot	are you using CO2 or propane? the M922A1's aren't made for CO2. I mess one up with CO2 at 600psi. is it stuck or does it just not return all the way to firing position? anyway, pull it apart and inspect it for flaws or damage. ensure you replace all the bearings and that they stay in place. when resetting, use something with a point that you can insert into the little hole and wiggle it a bit as the spring pushes it.

June 29th, 2011, 20:46	#8
VooDooPeteK Trader rating Join Date: Feb 2010 Location: Thorold, Ont	Using propane ( I do also have co2 ones that I have been using but with these ones propane) I pulled them apart and inspected them but can't see anything that would cause the part not to be able to be pushed back into place. __________________ http://www.gorillaairsoftradio.com/ Great Airsoft Podcast Gun tech work, Parts, Upgrades and anything else you might need http://www.fortythievesmcnation.com/ Support your local 1%er

June 29th, 2011, 20:51	#9
Jugglez Trader rating Join Date: Feb 2005 Location: Swimming in a pool of Xpresspost receipts.... Toronto - 400/401	The valve spring pushes the pin against the base, is the valve spring still there? if so is it bent or misaligned? __________________

June 30th, 2011, 16:28	#10
VooDooPeteK Trader rating Join Date: Feb 2010 Location: Thorold, Ont	ok so I updated the OP with pictures and a bit of explanation to the pictures and the problem Normally I would just buy i rebuild kit but both parts that seem to be the issue (one or the other or maybe both) you can't buy on there own __________________ http://www.gorillaairsoftradio.com/ Great Airsoft Podcast Gun tech work, Parts, Upgrades and anything else you might need http://www.fortythievesmcnation.com/ Support your local 1%er

June 30th, 2011, 16:45	#11
wildcard Trader rating Join Date: Dec 2001 Location: In my man cave	Based on my Kings and cherries set up the spring sits between the pressure valve (the big one) and the push pin valve, now the last picture looks like as if the spring was not installed and that you didn't screw the body in far enough. The big pressure valve shoul pop into the chamber (that's how you reset it) and your bearings need to be in teh big pressure valve Last edited by wildcard; June 30th, 2011 at 16:47..

June 30th, 2011, 16:50	#12
coach aka coachster Trader rating Join Date: Mar 2008 Location: T dot	can you manually/physically insert the push pin valve into the hole in the base with it open?

June 30th, 2011, 17:19	#14
coach aka coachster Trader rating Join Date: Mar 2008 Location: T dot	Talk to who you bought them from and see if you can exchange them. Last edited by coach; June 30th, 2011 at 17:29..

June 30th, 2011, 17:31	#15
Jugglez Trader rating Join Date: Feb 2005 Location: Swimming in a pool of Xpresspost receipts.... Toronto - 400/401	Make sure you are centering the spring into the valve, there is a recessed ring in the valve where the spring sits in. If the spring is even a bit crooked to one side it will create this problem. I'm not sure how else this can happen, especially given everything was fine out of the box and u used it a few times. If you continue to have this problem you can email me directly __________________

Madbull 40mm nade issues (Updated with pics)

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