Downgrading to achieve fps limit

[XxBatteryxX]

Originally Posted by MaciekA

I recommend downgrading this gun to be your CQB gun, and then get another AEG for outdoor play. Either that or just stick with sub-350 fps for outdoor play until you can afford a proper outdoor setup. You can still lob BBs pretty far at 320fps, as long as they are heavy.

For a person new to opening up AEGs, the DBoys PDW (I have one) is somewhat annoying to get apart and put together, and if you do it often you risk shredding your wiring or stripping some threading on the gearbox (especially the screws that attach the grip to the body -- this threading goes fast, I've done it).

I'm not new to airsoft, I just never upgraded or took apart guns. I prefer just playing to the whole technical upgrading stuff. I want to get a Dytac Invader M4 as my outdoor. When I do I'm going to change the spring to make the pdw my indoor gun permanently.

[Stealth]

Originally Posted by XxBatteryxX

I prefer just playing to the whole technical upgrading stuff.

Contact an experienced gundoc.

[Hectic]

as far as fps reducer keep in mind that ttac doesnt allow use of those not sure about other fields

edit i see i was a lil slow on that lol.

[BennyBoy]

if you play at Ultimate Airsoft, they will do it for you for a fee

[pestobanana]

To be honest, a M100 may get your gun too hot, but since D boys has a pretty crappy air seal it might work. My G36 was getting 405 fps with a M100 spring. Using a M90 might be safer, I've seen guns with lesser air seals get 290 fps, but my Mk16 is getting 345 fps with the same spring.

You'll probably be fine with a 350 fps gun for both indoors and outdoors, 30 fps really makes no difference.

[Styrak]

Originally Posted by pestobanana

To be honest, a M100 may get your gun too hot, but since D boys has a pretty crappy air seal it might work. My G36 was getting 405 fps with a M100 spring. Using a M90 might be safer, I've seen guns with lesser air seals get 290 fps, but my Mk16 is getting 345 fps with the same spring.

You'll probably be fine with a 350 fps gun for both indoors and outdoors, 30 fps really makes no difference.

An M100 should be 330fps (if the manufacturer actually makes the spring to 100m/s)

[L473ncy]

Yeah I thought that was physically impossible too.... It may have been a mislabeled spring which has happened before.

Although that said I have a Modify S110+ spring (I don't believe they use an M/s rating for their springs) and it started at like 415 FPS before settling down to a consistent 394.

[m102404]

A M100 spring should be 330fps...in a "stock" gun. But what particular "stock" format that's based on has become a bit dated IMO.

IIRC most of the spring ratings were set as they related to a stock "TM mechbox" or the stock TM M90 spring in their guns. To that end they were rated pre-upgrades (or what used to be considered upgrades).

Many mechboxes/AEGs come stock with bearing spring guides, bearing piston heads, tightbores, many with decent airseals/etc...and those all affect the FPS over and above the spring rating.

So it's quite possible to get many fps over the spring rating for a lot of "stock" setups out there.

And then there's the QC issue of what the spring is actually made to. So it's either try-it-and-chronie...or drop down enough to be on the safe side. For sub 350fps it's always safe to go with a good quality M90 spring, because even with a nice setup you're typically hovering in the 330-340 range.

[Maxxa]

I would make friends with someone who can chrono your gun for you. What they say on the interwebs and what you actually have/can get are 2 very different things.
It could be way above 380 stock or under, it all depends on how well the air seals are.

I am actually gearing up to do the same thing. My gun is listed as 430fps and I want it just below 400fps. Instead of buying one spring and hoping I have the right one, I bought a spring set wich has 3 spings... try searching AEG springs on e-bay I got all 3 for $12 and free shipping.
If you are going to have your gearbox open you might as well upgrade some other parts while you are there like swapping bushings out for bearings. So you might want to get some bearings and shims.
Chrono's aren't cheap but if you play often and want to tinker a bit more it is a great investment, also the resale is pretty good on them from what I can see.

[Con Murder]

Nothing quick and easy is gonna please you... Unless VERY expensive escorts are your thing Put in the time (read for hours and watch vids) to learn the tech or pay to get it done. Think of it this way, is there any quick easy way to get my computer to perform the way I want? Well yes, money. Or I learn the tech

[pestobanana]

Originally Posted by Styrak

An M100 should be 330fps (if the manufacturer actually makes the spring to 100m/s)

From what I've seen they generally do get the labelled fps when you drop the spring in a stock gearbox with a shitty stock piston head. When I put a Modify S90 in my friend's stock CA, with the terrible yellow plastic piston, the gun had chronoed at 295 fps. When I changed the piston head to a modify one, it went up to 330 fps. When I put very same spring in my VFC I chronoed at 345 fps.

Also:
ww.airsoftparts.ca/news/modifyspringtest.pdf

Originally Posted by L473ncy

Yeah I thought that was physically impossible too.... It may have been a mislabeled spring which has happened before.

Although that said I have a Modify S110+ spring (I don't believe they use an M/s rating for their springs) and it started at like 415 FPS before settling down to a consistent 394.

It's definitely not a mislabelled spring, I have a bunch of Modify S90's, 100's and 110's and they're coiled differently, so I verified by comparing with another one that I bought.