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TM MP5 NGRS Owners

mightyjebus said:
I've just ordered a VFC GBB fixed stock as I think that will fit as well.  VFC stocks can be found on wgcshop at around £46. 
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I'm kind of tempted, although I'm guessing it's actually a solid, solid stock and thus no good for batteries? Interested to know the results. Unsurprisingly their torch is out of stock (like almost everything else in the world right now)

 
I wonder how bad the battery space becomes with the torch grip ?

When I go to check out on mlemart the total comes up as £9.80 for the handguard and shipping I wonder if they would notice ?

 
JamesWills said:
I wonder how bad the battery space becomes with the torch grip ?

When I go to check out on mlemart the total comes up as £9.80 for the handguard and shipping I wonder if they would notice ?
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Yeah, they will. The cart screws up from time to time but the actual billed amount will be picked up correctly.

 
So ran mine for the first time last. Guns insane. However I played one 15 min round on a fully charged LiPo 7.4v 1100 mAh next game, red light flashing nothing happening. Put fresh battery in no issue continued like a dream.

Put that same battery in from first game just now and working no issues with dry fire mode. Same with the second battery. No red light flash. Popped them both on and switched still no issue on dry fire

Is this something to worry about?

I ask because this is my second MP5 as my first came with a rattle and wouldn't take any batteries properly despite fully charged with both of them would constantly get red light and I guess go into its safe mode.

 
Last edited by a moderator:
it could be the C rating of the battery. everyone on here who has posted battery pictures are all C30+. it would be interesting to know the C rating of your battery. 

Some batteries list the C rating but its actually the B rating, for example a B rating of 60 amps would mean it had an actual C rating of 30., but some labels will say 30C but actually mean 30B and this really means 15C.

If you are running a battery with a C25 rating then it actually might only be 12.5C and you would have issues with prolonged longish bursts and the battery would drop output and the marui mosfet unit might sense it as a low battery.

 
mightyjebus said:
it could be the C rating of the battery. everyone on here who has posted battery pictures are all C30+. it would be interesting to know the C rating of your battery. 

Some batteries list the C rating but its actually the B rating, for example a B rating of 60 amps would mean it had an actual C rating of 30., but some labels will say 30C but actually mean 30B and this really means 15C.

If you are running a battery with a C25 rating then it actually might only be 12.5C and you would have issues with prolonged longish bursts and the battery would drop output and the marui mosfet unit might sense it as a low battery.
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So these are the two I have and used fully charged (but from the night before). The one with the red line cut out after 15 mins and the other worked well for rest of the night. But both work fine today. So with your info I'm guessing I need a better battery. View attachment 79846

 
don't want you running off ands spending your hard earned cash on a new battery but here's something to consider:

you could buy one of those cheap Lipo checkers. you plug it into the balance lead and it tells you the voltage of each cell. each cell should be the same, for example 4.3v but if it comes back as 4.3v and 4.1v then 1 of the cells might be on the way out. 4.3v would be on a fully charged battery but you can test on a partly charged battery but the results should still be the same on both cells. 36.v & 3.6V for example.

 
Oh so the rating on my batteries is okay? It does say 20c though? But the short burst 40c? (I'm new to airsoft so this is new to me).  The picture is of two separate batteries so would this just be one cell ?

If the majority are running 30c plus I might just play it safe and get one so I don't have the issue I did yesterday. If yourself or anyone recommend a LiPo that they are using that would be great in their MP5. I am going to get, when it comes out the new battery they are producing for this and future models. Well I've been told there is a new one.

 
yeah your battery rating looks fine. Since 1 battery worked fine and the other cut out after 15 mins then you'd normally suspect the battery that cut out but it could just be the tamiya connection not being the best and had a bad connection. waving the AEG around might have broke the connection enough for the AEG to think it was low in volts.

The newer TM battery will have 3 wires and most likely the 3rd wire will monitor resistance of the battery pack and use it as the check for low voltage in the battery.

TM don't have the best track record when it comes to batteries (SOPMOD battery anyone?) so it's an unknown choice. It might be the best battery in the world but it might not be. A few people have posted their batteries on here so if you want to buy another battery then use these to make your choice.

 
mightyjebus said:
yeah your battery rating looks fine. Since 1 battery worked fine and the other cut out after 15 mins then you'd normally suspect the battery that cut out but it could just be the tamiya connection not being the best and had a bad connection. waving the AEG around might have broke the connection enough for the AEG to think it was low in volts.

The newer TM battery will have 3 wires and most likely the 3rd wire will monitor resistance of the battery pack and use it as the check for low voltage in the battery.

TM don't have the best track record when it comes to batteries (SOPMOD battery anyone?) so it's an unknown choice. It might be the best battery in the world but it might not be. A few people have posted their batteries on here so if you want to buy another battery then use these to make your choice.
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Ahh ok. I do notice when I plug in it doesn't always line up and can be tough to take off and bends the pin slightly in the battery connector but then I get that with the M4 I have too. Well yeah as I say just wouldn't play ball with the battery after that first round despite reconnecting and connecting yesterday evening. But this morning fine ?. With the first one that came it wouldnt accept the battery without the red line that's why I marked them thinking one battery is dying out. I was also told it might be my charger as well.. its a fun game this. I guess if its stopping my battery then least the mosfet is working. 

But yeah will have a look at 30C batteries. Thank you for you help and new information. 

 
Like others have said, could just be a duff battery. If the specs on the battery are accurate then they should be sufficient.

First thing I'd do would be to change the connector out. If you're good at soldering, change it for the MR30's, if you're average then just change the adapter/converter from Tamiya to deans (or mini-deans). There are a couple of battery options posted earlier if you do want to try another one and they should only be around £15 - £16.

Yeah, those SOPMOD batteries weren't great. Conceptually a cool idea, but not well executed. Then again, we know the new Marui one will be a lipo. And will undoubtedly be designed to fit perfectly. I'll be interested to see the specs, but I'll confess I don't understand why it's going to have the third wire or exactly how that's going to work. I mean, you can already get voltage monitoring on the Gate mosfets and they only have the battery pos/neg running to them. Electrics not my speciality.

 
Ahh my soldering is shit but I know some tech guys. I have ordered a 30C 7.4v for now see if it happens again. But as I say put the red line battery in this morning and fine haha. I'm only over worrying because one has already gone back. So just want to make sure it's all gooood.

All learning so really appreciate the help to a "noob"

 
Wow, four pages in a no videos, com eon guys?  Also anyone got a Bolt MP5 as well, love to see a comparison.

 
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