Double Eagle M908B

[JakeF]

It's not the length so as the girth as the actress said to the bishop.  Wiring can take up quite a bit of space in the buffer, so you're either looking at trying to stuff the battery and wiring in, or to coil the wiring down the buffer (remember that it has to reach the end) and ram the battery down on top.

All that said, I'ma go and do some experiments now, as those 16-18mm x 20mm 11.1Vs might actually go into my MP5K or down a buffer tube.

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Yeah mny 7.4v stick that i have has a big wiggle room for a fatter battery and like you say the length isnt an issues as it just sits inside the stock just as long as the wirering isnt stretched then will be fine i seen a titan stick 11.1 battery that looked a good size for the buffer tube but them batteries where like £35 and i think thats rather ridiculous for a battery.

 

[RostokMcSpoons]

At 3000mAh you're just needing to buy one Li-Ion battery rather than two Li-Po's. So there's that.

On the downside... where can you get one for £35?  Seems to be £45 at Land Warrior, or Airsoft Anonymous (out of stock)?

And at 20cm I don't think it'll fit in the buffer tube.  Not with the wiring to contend with as well.  (But you've got the 908 crane stock, so you may be luckier than me in that regard.  You can certainly opt for the nunchuck version instead)

Next is the 'Li-Po' vs 'Li-Ion' quality of life stuff...  
You can't store a Li-Po with much charge in it.  If your charger does discharging down to a storage voltage then you're ok.   My ASG smart charger doesn't have that, so I've either got to buy a different charger, or find another way to ensure my battery is run down to its minimum level. 

 

[Rogerborg]

You can't store a Li-Po with much charge in it.

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You can. Opinions vary on whether you should, to maximise longevity  Given the low cost of lipos now, it's not something that I'm fussed about.  My B6 wants them at 3.7V per cell for storage, for what that's worth.

Bah, even 16mm x 20mm is a no-go for my purposes, 16mm x 16mm is about as big as I can go.

 

[JakeF]

At 3000mAh you're just needing to buy one battery rather than two. So there's that.

On the downside... where can you get one for £35?  Seems to be £45 at Land Warrior, or Airsoft Anonymous (out of stock)?

And at 20cm I don't think it'll fit in the buffer tube.  Not with the wiring to contend with as well.  (But you've got the 908 crane stock, so you may be luckier than me in that regard.  You can certainly opt for the nunchuck version instead)

Next is the 'Li-Po' vs 'Li-Ion' quality of life stuff...  
You can't store a Li-Po with much charge in it.  If your charger does discharging down to a storage voltage then you're ok.   My ASG smart charger doesn't have that, so I've either got to buy a different charger, or find another way to ensure my battery is run down to its minimum level. 

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yeah one of them would be enough thats true and i cant remember of the top of my head just did some digging online and found it sure it was £35. I was meant to have the 908 but they labelled all there 904a stock as 908b stock so got that sent to me and then didnt have the 908 in stock to swap so refunded me the difference in price and sent me a free speedloader. So i only have the buffer tube space for a battery in the 904a

You can. Opinions vary on whether you should, to maximise longevity  Given the low cost of lipos now, it's not something that I'm fussed about.  My B6 wants them at 3.7V per cell for storage, for what that's worth.

Bah, even 16mm x 20mm is a no-go for my purposes, 16mm x 16mm is about as big as I can go.

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Yeah agreed for the sake of £15 give or take its not worth worrying about in my opinion and i can get a 18cmx2cm battery in the buffer tube of my 904A with it just sticking into the stock a little it but doesnt make a difference as i have the stock extended so doesnt interfere.

 

[Druid799]

You can. Opinions vary on whether you should, to maximise longevity  Given the low cost of lipos now, it's not something that I'm fussed about.  My B6 wants them at 3.7V per cell for storage, for what that's worth.

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What he said , I’m terrible at looking after my Batts , I’ve never set them for storage , they don’t get touch until the day before my next game day I alway put them on charge first then when it’s beeping full I THEN put them on to balance . Touch wood the only batteries I’ve had die on me what I’d say was prematurely are 9.9v LiFe I was using for a couple of yrs all the ‘normal’ LiPo’s have been fine .

 

[EDcase]

A single Kong Power 7.4v 1300mAh 20c will last me a whole day.  I stick to single shot and only at targets I know I can hit.  In a stalemate I'll move instead of the endless exchange.

Of course I take about 3 batteries on a game day just in case ?

 

[RostokMcSpoons]

A single Kong Power 7.4v 1300mAh 20c will last me a whole day.  I stick to single shot and only at targets I know I can hit.  In a stalemate I'll move instead of the endless exchange.

Of course I take about 3 batteries on a game day just in case ?

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I'm a guy who subscribes strongly to the idea of 'suppressive fire'.   I got quite a few kills on my last game when I was spamming shots at an obvious location and people would either peek into it or jump out from it.   And the rest of the time I like to think I'm stopping them from using a good firing position to shoot at my team.   
Also - I've paid good money to be there, I'm damn well going to fire my gun as much as I can - it's fun    

Firing lots of single shots and 3-5 round bursts I estimate that I used around 1500mAH worth of juice (at 7.4v) for a full day's play on Sunday (one Li-Po emptied, plus a bit from my Titan which I wasn't sure was working ok, so was my backup).  I used up a bag and half of BB's, so between 4,000-4,500 BBs in that time.

It's good to hear the Li-Po storage thing can be abused somewhat.   I can't find my old 7.62 ammo can to store 'em in though, just using a Quality Street tin at the moment.   I suspect that'd melt pretty quickly in the worst case scenario ?

 

[Fatboy40]

At 3000mAh you're just needing to buy one Li-Ion battery rather than two Li-Po's. So there's that.

On the downside... where can you get one for £35?  Seems to be £45 at Land Warrior, or Airsoft Anonymous (out of stock)?

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My Titan 3,000 mAh Li-Io was £36 from the site shop (but my membership does give me 10% off of all purchases).

The way I play though it probably won't last me a whole day at my next game, at times my M904E may as well be an M249 ?

Edit: Also on Sunday just gone I probably used around 3,200 mAh of charge overall.

 

[Tactical Pith Helmet]

 My ASG smart charger doesn't have that, so I've either got to buy a different charger, or find another way to ensure my battery is run down to its minimum level. 

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Those ASG chargers are bloody awful in my experience.  Get yourself a decent charger and you might get away with a 1000mAh li-po all day. 

 

[JakeF]

Hey guys just an update since recieving my RIF. I LOVE IT!! honestly it is so solid and shoots lovely only on thing i dont like is the ROF with a 7.4v lipo so going to look at getting an 11.1 soon. I have ran into a problem tho when i attended a night game the other day. How do you take of the muzle break of the M904A as it looks like there is a grub screw but you cant reach it because of the rail? i know you will be able to take the rail system off but i didnt want to start tinkering with it on the night of the game incase i screw anything up. Gutted i couldnt use a tracer for the night but a super bright torch with a focus lense lit up normal bbs like a tracer. Anyone removed the rail before to be able to take the muzzle break off and if so any tips on things to look out for or easiest ways ect. TIA

 

[Fatboy40]

@JakeF You have to get that grub screw out otherwise you'll never get the muzzle / flash hider off of it, also DE use a little thread lock on it so it's a total bitch to remove it.

I got through a few allen / hex keys that just stripped themselves to nothing as the thread lock is blindingly strong. In the end I had to use the smallest one of these...

https://www.amazon.co.uk/dp/B09BYJC2K7/?coliid=I1YDF0OCC4P0WM&colid=2BOB15BB0VKA5&psc=1&ref_=lv_ov_lig_dp_it

... to remove it (and my Acetech Brighter-C fitted perfectly).

 

[RostokMcSpoons]

I ran two Turnigy nano cell 11.1v 1200 mah lipos through the day today.  Rate of fire was noticeably better but the gearbox was whining a bit at the end... Not sure if that is normal after running through several thousand BB's, I'll have to find a video of 'shimming, before and after' to judge.

Plenty of kills at range even though my gun chrono'd at a slightly disappointing 270fps with 0.20g but hopped for 0.28g BB's.  If the spring has weakened already then the extra juice might be over stressing things...?

 

[Ebeneezer Goode]

Wouldn't worry at fps with hop added, one of the effects is a reduction in velocity and I'd say that 270 with hop applied is decent.

Gearbox might just need some lubrication?

Springs need time to settle when new, wouldn't worry too much.

 

[JakeF]

@JakeF You have to get that grub screw out otherwise you'll never get the muzzle / flash hider off of it, also DE use a little thread lock on it so it's a total bitch to remove it.

I got through a few allen / hex keys that just stripped themselves to nothing as the thread lock is blindingly strong. In the end I had to use the smallest one of these...

https://www.amazon.co.uk/dp/B09BYJC2K7/?coliid=I1YDF0OCC4P0WM&colid=2BOB15BB0VKA5&psc=1&ref_=lv_ov_lig_dp_it

... to remove it (and my Acetech Brighter-C fitted perfectly).

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Thanks for the reply but my problem is actually accessing the grub screw as the rail system covers it so that needs to come off to be able to access it but i havent a clue how to get it off.

 

[RostokMcSpoons]

On my 906C there's a small hex bolt on a thread that you can see through a slot in underside of the handguard, close to the receiver.  I think you just loosen that off to detach the handguard from the top receiver.
And there's a small hex bolt at the front end of the handguard that also needs undoing.

I've not had to take my handguard off, so maybe I've missed something!   Also - I can access the grub screw without doing that (which is nice) - I'll be needing to do that as I've got a suppressor on the way.

Edit...

Pic of the two things I'm talking about...
View attachment 82138

Well wouldn't you believe it.  The suppressor I was talking about is a Novritsch one that I ordered on Black Friday... but a little before that I'd ordered a cheapo one from AliExpress, and it's just turned up!   So I had good reason to take the flash hider off mine.  

I had no problem with the grub screw, and no problem with the flash hider either.   No thread lock goo found in mine.
I fitted the suppressor and managed to chew up some of the thread as it's quite fine and very soft and my first attempt wasn't quite done right... so do take care when fitting your tracer (of course, if it's a reputable make it might only go on 'properly').   And I noticed when trying the flash hider back on my slightly mangled thread that it's (now?) quite loose, so that grub screw is important - don't lose it!

Anyway the result is rather nice, though the finish is a little too shiny, i might rough it up with a brillo pad or some polishing paper.   It'll get replaced anyway when my Novritsch modular one turns up, complete with camo cover for a different look... but not bad for less than a tenner!

View attachment 82137

 

[Fatboy40]

Plenty of kills at range even though my gun chrono'd at a slightly disappointing 270fps with 0.20g but hopped for 0.28g BB's...

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Others might not be worried but that sounds horrendously low to me, that would have to be an immense amount of hop to rob you of around 70 FPS from a stock of around 340 FPS?

I use 0.25g, the sweet spot for where I usually play, and with the hop set for this I still get around 335 to 340 on 0.20g when put through the chrono (and I'm going to test this myself again tomorrow morning, as I'm off work, to be 100% certain). I swapped in a Guarder SP100 spring a couple of months ago, the DE original had definitely compressed over around four full Sundays of play, however I'm also coming to the conclusion that the air-seal on DE M90X's is not as good as it could be (spring 2022 mine will need a good service and I think I'll swap in a better cylinder head, piston head and nozzle. 

 

[RostokMcSpoons]

Thanks @Fatboy40

I've got a cheap chrono come over from China, and I was planning to change the spring eventually.  Given that info I'll do it as soon as the  chrono turns up.

It'll also give me a chance to give the internals a look (though probably not as far as opening the gearbox) and maybe get some silicon grease onto the piston head.

 

[Ebeneezer Goode]

Due to the way hop works, FPS does drop, often substantially, it is nothing to worry about. Regarding full-auto, anyone chronoing 330-340 on 0.20g with hop applied sounds rather suspiciously hot, chrono is usually done without hop applied and at the correct weight used in order to calculate the energy, which is the most important thing as its what we're limited to (1.3j max as per UK Law, most sites are 1.1/1.2j). Of course if you're DMRing and locked to semi you've got much higher limits.

Would be interested what the chrono is reading on 0.25g and without hop, sounds like a hot gun North of 1.3j to me.

Reason being, it's not the velocity that'll break your eyepro and blind you, its the energy of the pellet, and as hop can be adjusted during play that's why it's checked with no hop applied, i.e. max. velocity/max. joules...

 

[Rogerborg]

Due to the way hop works, FPS does drop, often substantially

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Although thanks to airsoft physics and air seal shenanigans, it can also go up.

chrono is usually done without hop applied

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Site dependent, I've never once been asked to dial my hop off.  Some guns need to be disassembled in order to do it.

I agree that the legal limit is a hard 1.3J, but it's quite tricky to determine what our gnus are really capable of, given that "any missile" could mean a 0.86g steel BB that would shred the hop and barrel in short order (but the intent is to limit what they could do, not what we would do with them).

For all that I'm hot for chrono, I've never been a fan of dialling off to hop.  For safety considerations (as opposed to legality), I'd advocate chronoing in game with the hop and the BB mass that players are actually using, since that's... well, what they're actually using.

Plenty of kills at range even though my gun chrono'd at a slightly disappointing 270fps with 0.20g but hopped for 0.28g BB

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Urgh, that's weaker than a politician's excuse.  0.67J, even TM fanbois would have a hard time justifying that.

Have you spooged any silicone up the nozzle?  That might be enough to get a better seal. If not, I'd bite the BB and change that spring for a known quantity.

 

[RostokMcSpoons]

Urgh, that's weaker than a politician's excuse.  0.67J, even TM fanbois would have a hard time justifying that.

Have you spooged any silicone up the nozzle?  That might be enough to get a better seal. If not, I'd bite the BB and change that spring for a known quantity.

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I'm still waiting on my chrono to turn up, but it's in the UK so shouldn't be long.  Then I'll be able to show some 'before' figures.  see what it's like with 0.20s and no hop, and with 0.28's both hopped and not.
I'll order an M100 spring now, so hopefully I can swap it over in short order and get some 'after' figures quickly too.

Honestly the only time I actively felt out-ranged by a non-sniper on Sunday was when I was up against one of the two HPA players.  Hey, maybe my tactical movement and fieldcraft is so brilliant I got so close I didn't need range    
I'd had plenty of time on the range to get my hop nicely dialled in before play... I was getting the most out of what it had to give.  I was hitting the small metal "40m" sign quite easily, I guess I kept my engagements to that sort of distance.

(Which reminds me, you may remember me talking about one of my first games where I used my old M16 and the tech found it wasn't applying any hop..?  I got some 'disbelief' when I said I was getting ranged kills with that.   Turns out it was shooting rather hot - I'd missed the chronoing session as I'd arrived late and with my kit in a shambles... so it was running quite a bit above the AEG limit. ? Luckily (for the poor buggers I was hitting) it was misfeeding on full auto so I was only using it on semi anyway.)

edit:  While I'm ordering stuff... any recommendation on the hop rubber and nub?  As the current setup is lifting 0.30s ok, then it's not strictly necessary... but I'm paying a few quid postage so might as well make it all worthwhile