Fps Downgraded

[Mad Dog]

Recently, i've found myself having a LOT of newbie questions. Hopefully, i can be excused since i -am- a newbie.

Alright, moving on...

I have noticed in games descriptions that some have fps maximum depending on the guns. I also seen that it -could- be modified, although it depends on the gun model and so forth.

My question: How can the fps of a gun can be downgraded without any internal modification, and how can i know if it's compatible with one of my rifle.

Thank you in advance for your time and patience with the newbies to the hobby/sport.

[caboose36]

You could always get your hands on a TM Velocity Reducer.

http://www.airsoftgi.com/product_inf...roducts_id=302

[Syn]

heavier bbs eg .25 .28 .30 but this means you have to make sure you are allowed to use them where you play. Also IIRC there is a hider attachment that will reduce fps.

[TokyoSeven]

How can FPS be lowered without internal modifacation?

TM velocity reducer.
http://www.airsoftparts.ca/store2/in...roducts_id=920

It would help if you could tell us what you have for an AEG.

[Mad Dog]

Originally Posted by Syn

heavier bbs eg .25 .28 .30 but this means you have to make sure you are allowed to use them where you play. Also IIRC there is a hider attachment that will reduce fps.

Noob Question: What do you mean by IIRC?

Originally Posted by TokyoSeven

How can FPS be lowered without internal modifacation?

TM velocity reducer.
http://www.airsoftparts.ca/store2/in...roducts_id=920

It would help if you could tell us what you have for an AEG.

I got a Tokyo Marui M4A1 New type. Although the question apply also to any gun i would concider purchasing, like for example a springer with high fps that i'd wish to downgrade for other un-conventional guns.

The Speed reducer on that page is an "external" upgrade?.

[caboose36]

Yes it is, you unscrew the flash hider and screw the reducer on in the flash hiders place.

[Mad Dog]

Sweet!...thanks a lot

[Syn]

Originally Posted by Mad Dog

Noob Question: What do you mean by IIRC?



I got a Tokyo Marui M4A1 New type. Although the question apply also to any gun i would concider purchasing, like for example a springer with high fps that i'd wish to downgrade for other un-conventional guns.

The Speed reducer on that page is an "external" upgrade?.

If I Remember Correctly. No worries though, it is the TM velocity reducer that eveyone else is talking about.

[Cheesevillage]

IIRC heavier BBs make no difference. Its not FPS we worry about its total energy.

[Mad Dog]

Okay, here's yet another Noob question: What's the difference between FPS and Total Energy. When we reduce one, doesn't it reduce the other? Or does that mean that IIRC doesn't actually reduce FPS.

Logically, a "slower" ball has less strength, so i just want to know what you ment by what you said Cheesevillage.

[m102404]

Originally Posted by Syn

heavier bbs eg .25 .28 .30 but this means you have to make sure you are allowed to use them where you play. Also IIRC there is a hider attachment that will reduce fps.

Just my take on things, and really you should clarify with the game host if you are at all unclear of the FPS/power limits for a game/event.

If you're shooting 400fps with 0.20g bbs and then switch to 0.30g bbs, you'll be shooting under 350fps...but that doesn't mean that you can use it in most games that are set at a 350fps maximum.

Most games, to my understanding, are set using 0.20g bbs as a reference and list the max velocity according to that.

Clarify with the game host if in doubt...chrony your rifle to be sure.

[Renegade)]

One trick for the original question, to reduce your FPS, just reverse the spring, tigher coils into the piston instead of the spring guide. Only works for non linear springs.

AND yes, the FPS is measured with .20's only.

[TokyoSeven]

If you have a stock TM M4 you should not be worrying about FPS.
However since your asking Im assuming the M4 is possibily upgraded and if so most likely not by you. Either way the velocity reducer is your best option.

[The Saint]

Originally Posted by Mad Dog

Okay, here's yet another Noob question: What's the difference between FPS and Total Energy. When we reduce one, doesn't it reduce the other? Or does that mean that IIRC doesn't actually reduce FPS.

Logically, a "slower" ball has less strength, so i just want to know what you ment by what you said Cheesevillage.

FPS limit is something of a misnomer, it's really a muzzle energy limit.

The AEG itself always outputs a fixed amount of energy, in the form of the piston displacing a certain amount of air at a certain pressure down a certain length of barrel. Unless the internals are changed, that's always the same regardless of the BB weight. That's what determines the amount of energy a shot has, not BB weight.

When you introduce BB into the equation, the BB is working with the amount of energy the gun is providing. A lighter BB will travel relatively faster than a heavier BB out of the same gun precisely because the amount of energy is the same in both cases. However, that doesn't mean a slower, heavier BB has less strength, since it takes more energy to move heavier objects, but the heavier BB also retains momentum much better (takes more to deflect the heavier BB from its path once it starts moving). In the end, lighter and heavier BBs both receive the same amount of energy from the gun, and both will deliver the same amount of energy on impact at point blank distance.

[FOX_111]

There is no way to safely drop the fps of a gun without changing some parts in it.

The velocity reducer is unsafe in high fps and on full auto. The small lips that slow the BB down can break or bend out of shame and allow the BB to go trough at full speed.

Games host should set their fps limit based on joule output. But since almost no one know what 1 joule is, it's done in fps.

A stock 280fps gun give about 0.70 joules with 0.20g BB.
A 400fps gun will output 1.49 joules with .25g

If I set my field limit at 1.49j, no mater what weight of BB you put in your gun, you still have to be under 1.49j. Heavier BB goes slower, but hit with more energy for a longer time (distance).

Here is an example for snipers.
Normal limit for sniper is 1.88j or 450fps with 0.20g. When using 0.30g, the velocity drop to 367fps. Since the 0.30g BB retain it's energy farter, it require a minimum safe engagement distance of 40 feet to be safe. At 40 feets down range, the BB has slowed anough to carry about 1 joule of energy, wich is a standard energy output that is hard enough to sting but not enough to break skin.

1 joule output is equivalent of a hit from a 0.25g BB comming from a 350fps gun at 10 feets.

You now have a good idea on how things work.