What do I need to pull an M140?

[Shogun (AKA Basic)]

So, I've looked around and could not find a total answer on this. People would say many thing would have to be replaced, and some would say only a couple things. So, I thought I'd post it here...

I have an Echo 1 SCAR-L (Mk16) that I am looking to turn into a DMR. It is bone stock but was reshimmed by triggs. What needs to be upgraded in the gearbox to pull and fire a M140 spring? I have concluded these for sure:

Motor
www.evike.com/product_info.php?cPath=24_73_381&products_id=29144

Spring (obviously)
www.evike.com/product_info.php?cPath=24_611_333&products_id=26261

I have questions on if I should get gears, a cylinder, or whatever else. Just to recap the thread... What do I need to upgrade in a bone stock Echo 1 Mk16 to SUCCESSFULLY PULL, and CONSISTANTLY FIRE an M140?

Thank you.

[redalert]

Well, it's up to you really. You could replace everything and not really have to worry about much breaking or wearing, or you could place your faith in the quality of Echo 1 internals. Personally, I'd gut the whole thing and just get a guarder FTK or something. Also, go with a PDI spring. I know that's not exactly the answer you were looking for, but it is really up to you if you want to replace it all or not.

[Thundernuts Cockpunch]

Entire gearbox, pretty much.

[ctres]

None of that is very helpful, since you guys just gave general ideas. You will probably want stronger gears, but if you have the xyt gears in there already you may be good to go (at least for semi only) since they are known to be decently durable. However, a good replacement would be some cheap SHS torque gears. You'll need a torque motor too. Motors like the G&P m160 are known to be really good, but within the last year or so the acm torque motors have proven themselves very well. Although the QC may not be as good as G&P or something, when working properly, which they seem to do almost all the time, they are known to outperform many of the higher end ones. Brands that these are sold under are shs, element, dream army, and a few others that I can't remember off the top of my head. All of the brands that I listed are the exact same motors sold under different names.

You will definitely want to replace the plastic cylinder head, and spring guide with metal ones, and either replace or polish the stock cylinder. You will also probably want bushings rather than bearings for that kind of setup since the scar's box only has 7mm holes.

A new piston will be in order as well. You will need to correct AoE, using some sorbo which will also help with shock absorption (something that is actually debated on MIA, but is regarded as fact on places like ASM, whose members build some seriously crazy guns) so I guess you can decide what you want to believe, but either way, you will need to correct AOE in some way, and sorbo is usually better than washers on the piston because it minimizes the ammount of weight moving. Some good cheap pistons are made by SHS as well. You may or may not need metal teeth. It may require some experimentation, but they are so cheap that you could buy a couple types to try out.

That should about do it for durabilty, there are obviously some other things you could do to maximize the performance, but I'm pretty sure I covered most things. If you have no idea what half the things I just mentioned are, then you probably aren't ready for a build with an m140. If you need any links or clarification feel free to ask. I can always give you more info.

Edit: I believe that the matrix motor you linked to is actually the same ACM kind as I mentioned, just another rebrand, but a bit pricier because it is in the US.

[redalert]

Guarder makes some of the best upgrades around, they are very durable and highly reputable. Try this FTK out:
www.evike.com/product_info.php?cPath=24_81_261&products_id=24795

Get a new spring such as a pdi or something similar such as this:
www.evike.com/product_info.php?cPath=24_611_333&products_id=31459

Put all of that in a new shell, again I'm using guarder because of its reputability:
www.evike.com/product_info.php?cPath=24_68_518&products_id=24814

Then you'll need a new motor for all these new shiny parts. I'd recommend the guarder or the matrix infinite torque up, I've used both and both are great.
www.evike.com/product_info.php?cPath=24_73_381&products_id=29144
www.evike.com/product_info.php?cPath=24_73_381&products_id=27935

Then to top it all off, you'll want a probably want a new barrel and hop-up unit to make use of all of that power you just acquired. Madbull has served me extremely well if you don't feel like spending $60+ of just the barrel. The hop-up chamber is more important than the barrel itself for the most part because you want a quality seal on the barrel and it to give you consistent spin shot to shot. Here are my recommendations,
www.evike.com/product_info.php?cPath=24_72_375&products_id=24373
www.evike.com/product_info.php?cPath=24_71_371&products_id=32281

If the barrel isn't the right length, I think you can find the right one easily enough. The reason I didn't do this the first time or the person below me didn't is because it's more important for you to find things on your own. You did the right thing listing what you had in mind with links, but don't bee afraid to do that with a complete list of upgrades as well. Again, it costs a lot of money to fully upgrade any airsoft gun, so it's up to you if you want to do it in stages or not. Also, try to stick to one brand such as what I linked you. Different manufacturers have different tolerances and not everything will go together sometimes if you start mixing and matching brands. Hope this helps, let me know if there is anything else you need help with.

[Ike]

As Ctres alluded to, you don't really need gears higher than torque up ratio, and you can easily pull an M140 on standard gears with a good battery and neo magnet motor. Torque up gears will lessen the load on your motor, but your rate of fire and trigger response will also suffer. If you can get good compression out of your stock cylinder set, don't bother replacing it, just pad the cylinder head with some sobro and replace it with a metal one when it breaks. Metal bushings and spring guide should be obvious, and upgrading to an SHS piston would definitely be a good choice. I'd advise you to stay away from any full tune up kits for the simple fact that you can get better parts elsewhere for less money.

[Alucard]

If you need cheap-priced, close SHS parts you can always try clandestine. If you have enough money you could always try siegetek concepts.
As far as sorbothane goes, you could also add in addition an airbrake to help reduce the shock on the gearbox. Especially if you want a more successful momentum transfer and are going to use a heavier aluminium piston.
clandestineairsoft.com/

[Ike]

+1 for Clandestine. They've always had what I need when Ehobby didn't, and the service is great.

[Shogun (AKA Basic)]

Thank you for all of the help guys. I think that I will buy parts one or two at a time. If I start with just upgrading the motor with the Matrix motor mentioned above...
... What do I need to upgrade to just use this motor?
II'm not a great airsoft tech. Actually, I'll admit to being a n00b when it comes to this. So I really need the help, and some suggestions on parts. Thanks.

EDIT: Link removed, the link was already mentioned. Sorry about that.

[redalert]

At least buy a new piston as that will most likely be the first thing to break.