cafemondo Posted January 27, 2008 Report Share Posted January 27, 2008 Plenty of topics been going on around the place regarding the externals and battery siting. The mechbox stuff has been thrown around the place everywhere. Im looking to make my M249 more reliable. Ive got an element ftk kit, an aluminium piston on the way and just about to order a prometheus polycarb piston. I presume the piston I need is the Ball Bearing POM model? Link to post Share on other sites
infected Posted February 12, 2008 Report Share Posted February 12, 2008 I'd get the prometheus hard piston. That's what I've put in my M4 and my M249. From what I hear from guys in the know (at Airsoft Mechanics), that is the best piston you can buy. Don't bother with aluminum pistons as all they'll do is beat the tar out of that clone gearbox. I've got an Echo1 / A&K M249 myself, and I'd never consider putting an aluminium piston in it. Heck, I wouldn't do that to my CA M4. The Element gears are okay... not great by any means. I'd defiantly suggest using a mosfet (preferably with active breaking), and upgrading the wiring in the gun. Also, the stock motor is lame in the ROF category. I'd downgrade from that 400 fps spring and go with an m100 and put in a high speed motor. I'm using the Guarder High Speed motor myself. With an M100, Standard ratio gears, Mosfet with Active Breaking, Guarder High Speed motor, upgraded wiring, I'm shooting 20 rps on a cheapo 8.4v mini battery. Link to post Share on other sites
tshrake521 Posted February 12, 2008 Report Share Posted February 12, 2008 I'd get the prometheus hard piston. That's what I've put in my M4 and my M249. From what I hear from guys in the know (at Airsoft Mechanics), that is the best piston you can buy. Don't bother with aluminum pistons as all they'll do is beat the tar out of that clone gearbox. I've got an Echo1 / A&K M249 myself, and I'd never consider putting an aluminium piston in it. Heck, I wouldn't do that to my CA M4. The Element gears are okay... not great by any means. I'd defiantly suggest using a mosfet (preferably with active breaking), and upgrading the wiring in the gun. Also, the stock motor is lame in the ROF category. I'd downgrade from that 400 fps spring and go with an m100 and put in a high speed motor. I'm using the Guarder High Speed motor myself. With an M100, Standard ratio gears, Mosfet with Active Breaking, Guarder High Speed motor, upgraded wiring, I'm shooting 20 rps on a cheapo 8.4v mini battery. Airsoft mechanics begs to differ http://www.airsoftmechanics.com/home/conte...iew/22/29/1/15/ Deepfire Polycarb with Titanium tooth is my choice. Link to post Share on other sites
infected Posted February 12, 2008 Report Share Posted February 12, 2008 That review is from 2004. Post on there and ask about it. I'm sure you'll have more positive responses than negative ones. Link to post Share on other sites
Beast06 Posted February 26, 2008 Report Share Posted February 26, 2008 The Prommy piston is not the best high ROF piston at all. For longativity - a Deepfire Titanium does the trick. Max ROF - Angel High Speed Link to post Share on other sites
biguk Posted February 26, 2008 Report Share Posted February 26, 2008 Hey guys, Fingers crossed i should have my M249 delivered tomorrow. I was thinking about upgrades, and what is possible with this. How compatible are these A&K M249's with off the shelf urgrades or replacement internals...Can i go buy upgrades specific to the CA model and they will be fine..or will there be some modifying involved? Also batteries. I will most probably replace the battery. Now i have the Para varient. im looking for 9.6v with over 2000 mah. Does any one know of any batteries cabaple of this that can fit in the front end? im relativly new to airsoft and dont know much about batteries and upgrades. Its just knowing what to buy would be the help Link to post Share on other sites
infected Posted February 26, 2008 Report Share Posted February 26, 2008 Any version 2 parts will fit in the gearbox no problem. I've downgraded my spring, upgraded the motor, replaced the piston and piston head. This is a good gearbox to learn on as there's no having to deal with the tension of the spring on the gears and bits when you take it a part. Good luck. Link to post Share on other sites
biguk Posted February 26, 2008 Report Share Posted February 26, 2008 im considering a spring downgrade as i think its slightly too hot to play at my local skirmish site. But i will see how it goes. What spring would you recommend...I also want to increase the ROF what would you also recommend? Link to post Share on other sites
infected Posted February 26, 2008 Report Share Posted February 26, 2008 I downgraded to an m100 spring to increase my ROF. I haven't chrono'd the gun, but the increase in the ROF was measurable. If you're looking to increase the rof, make sure to replace the stock motor with a high speed motor of some type. Link to post Share on other sites
beasthunter33 Posted February 27, 2008 Report Share Posted February 27, 2008 I have a deepfire titanium tooth piston in my Inokatsu and its one of the smartest things I ever did, prior to that I went through 3 polycarb pistons, the stock one, a systema, and an Angel. I just bought an A&K and the first thing that is going in when the gearbox dies is a Deepfire piston and systema gears, its an awesome combination for durability. Link to post Share on other sites
biguk Posted February 27, 2008 Report Share Posted February 27, 2008 Its arrived!!! i will run it in and see how it performs. Then obviously make decisions on the upgrades and downgrades over the next few weeks...But thanks for all your comments guys. Appreciate it Link to post Share on other sites
Pablo Posted February 27, 2008 Report Share Posted February 27, 2008 I fitted a CA high speed motor and encountered feeding problems and two stripped pistons (both Element). It now has a CA piston and the original motor. I will try a standard CA motor soon. The stock motor gives me 12rps with an M100, the high speed gave me 24rps. Hopefully the standard CA short will give me 18rps (ish) as 12rps is poo. I also replaced the bevel gear with a CA one as it fitted better (far less screeching) and gave it as full shim replacement. I also replaced the anti-reversal latch with a beefier G&P one 'cos the stock one rattled. Much quieter now. The wiring is next on my list. To rectify the misfeeding, I've modded the mag and replaced the hop unit with a CA. Misfeeding was chronic with the high speed motor, seems beefing up the voltage in the mag can fix this. Link to post Share on other sites
infected Posted February 27, 2008 Report Share Posted February 27, 2008 I fitted a CA high speed motor and encountered feeding problems and two stripped pistons (both Element). It now has a CA piston and the original motor. I will try a standard CA motor soon. The stock motor gives me 12rps with an M100, the high speed gave me 24rps. Hopefully the standard CA short will give me 18rps (ish) as 12rps is poo. I also replaced the bevel gear with a CA one as it fitted better (far less screeching) and gave it as full shim replacement. I also replaced the anti-reversal latch with a beefier G&P one 'cos the stock one rattled. Much quieter now. The wiring is next on my list. To rectify the misfeeding, I've modded the mag and replaced the hop unit with a CA. Misfeeding was chronic with the high speed motor, seems beefing up the voltage in the mag can fix this. You probably lost your piston due to the high rof and not having good mesh of your sector gear to your piston teeth. I've noticed that the stock pistion (and the aftermarket ones I've tried), all meshed improperly till I removed the second tooth of pistion partialy. I'm running a high speed guarder motor, 9.6v battery, and mosfet with no issues now that I removed that second tooth. Increaseing the voltage in the box mag fixes the feeding issues. I'm running 4 AA cells in there. Link to post Share on other sites
biguk Posted February 27, 2008 Report Share Posted February 27, 2008 Box Mags...i'd like to be able to get a spare box mag....can i buy an A&K one off the shelf? Or can i just use the CA Box mags, as i understand its a clone of this? Link to post Share on other sites
infected Posted February 27, 2008 Report Share Posted February 27, 2008 Glad to see you searched real hard /scarcasam Yes, A&K box mags are readily available at quite a few online stores. If you're running 20+ rof, know that you'll need to increase the voltage to the box mag to have it feed reliably. Link to post Share on other sites
biguk Posted February 28, 2008 Report Share Posted February 28, 2008 I've searched the UK online stores and found nothing apart from CA and star mags. Are CA mags compatable with the A&K? Link to post Share on other sites
beasthunter33 Posted February 28, 2008 Report Share Posted February 28, 2008 Yes they are. Link to post Share on other sites
biguk Posted February 28, 2008 Report Share Posted February 28, 2008 Cool thats all i wanted to know. I have found the A&K Box mags on Rsov.com aswell. Cheers guys, picked up the M249 last nite...it looks a beauty, I was suprised at the amount of loose items on it though....but from what i can see im very impressed. Well pleased!! Cheers for all ur comments Link to post Share on other sites
biguk Posted February 28, 2008 Report Share Posted February 28, 2008 Sorry for the double post but its not letting me edit my post. Just ran my first 100-200 rounds through the A&K M249 and ive noticed that i get miss-fires, so i get large intevals or gaps appearing in the line of BB's, after about 5-10 secs continous bursting. Its like the box mag is not feeding fast enough (ive heard increasing the voltage in the Box mag helps). Is this common piece for an M249 straight out the box? ive not had a chance to go round and tighten everything yet...as ive now gone to work. Thats tonights job. I did expect to come across some issues with it, but i guess i didnt expect it to happen straight away, going on comments ive read. This is my first Clone/ACM gun and im used to the Quality of TM. Im guessing its nothing to loose sleep over. It just suprised me. Overall im still well chuffed with it though..its a beautiful piece of Kit. Very happy to spend the money on it Link to post Share on other sites
infected Posted February 28, 2008 Report Share Posted February 28, 2008 If you're running a large or higher voltage battery, or have downgraded the spring then you will have feeding problems till you add 2 more batteries to the power supply of the box mag. Link to post Share on other sites
biguk Posted February 28, 2008 Report Share Posted February 28, 2008 If you're running a large or higher voltage battery, or have downgraded the spring then you will have feeding problems till you add 2 more batteries to the power supply of the box mag. As i said its straight out the box using the battery that came supplied...Althought ive not charged it myself. Im just using the test charge. Sorry for all these questions....but i wanna learn Link to post Share on other sites
infected Posted February 28, 2008 Report Share Posted February 28, 2008 Well there are a few threads going about on the topic of the A&K / Echo1 M249. You should read all of them, and you'll learn much. Link to post Share on other sites
Pablo Posted February 29, 2008 Report Share Posted February 29, 2008 You probably lost your piston due to the high rof and not having good mesh of your sector gear to your piston teeth. I've noticed that the stock pistion (and the aftermarket ones I've tried), all meshed improperly till I removed the second tooth of pistion partialy. I'm running a high speed guarder motor, 9.6v battery, and mosfet with no issues now that I removed that second tooth. I did take the tooth out - also tried removing the next one. Two pistons completely knacked. The gear was engaging about halfway down the piston and stripping 4 or 5 teeth out. I'll get it right eventually! Link to post Share on other sites
cafemondo Posted April 6, 2008 Author Report Share Posted April 6, 2008 I started work on the gearbox last night. I think Ive swallowed my anti reversal spring, cant find it anywhere. Where can I get another? preferably about 5 of them so this never happens again, so frustrating. Link to post Share on other sites
cafemondo Posted April 17, 2008 Author Report Share Posted April 17, 2008 Panic over, everyone stop rushing around. Rebuilt gb now with new element bits and bobs and seems to be doing ok on the worktop, however Ive probably over done it on the shims. It sounds slower perhaps? Ive had a search and cant find a suitable pic or guide that works for me. Can someone please write up their reshim in regard to the A&K gb? a picture from underneath showing how close they mesh together would be excellent. Link to post Share on other sites
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