KWA SR5 or SR10?

[MikeRarrmeh [64oz]]

Most of the fields I play at are close to mid range (sometimes loooong but I can run around )

My src m4 still has yet to work, whenever I fix something, something else breaks. So with that said, i'm finally just going to buy a kwa.

Anyways I was gonna get one of those 2 guns and I was wondering something if someone knew a bit about them

Was wondering if all the internals were the same? Including the spring (sr5 is chronod around 340 and sr10 is 390-400) I didnt know if that FPS difference would just be the barrel length which doesnt seem right, but they both shoot around 1200 RPM with the 11.1 lipo so *shrug* maybe they have the same spring

But the main thing I wanted to know was:

If I put an M4 sized barrel on the SR5 would it be just as accurate and shoot the same fps as the SR10? (if they have the same spring)

Thanks

[Grease]

Was wondering if all the internals were the same? Including the spring (sr5 is chronod around 340 and sr10 is 390-400) I didnt know if that FPS difference would just be the barrel length which doesnt seem right, but they both shoot around 1200 RPM with the 11.1 lipo so *shrug* maybe they have the same spring

Just FYI, the spring isn't what decides the RoF (unless you have an enormous spring in it, then it'll decide that you need to fire reeeaaally slow )

The spring is what shoves the piston foreward again after the motor pulls it back, thus shooting the BB out the barrel. The motor and gears are typically what decide how fast the piston gets pulled back, which in turn decides how fast your RoF is.



But yes, if both guns have the same spring, theoretically they should have the same FPS. Different quality air nozzles and piston heads and TTBs can affect the FPS a bit, but they shouldn't differ that much.

[Variable]

Don't listen to grease, he doesn't know WTF he's talking about.

Barrel size can effect FPS depending on what length barrel and what cylinder (ported, not ported) you have. A different spring is the most common way to adjust FPS. I can't confirm what cylinder the SR5 has, but if you put an m4 length barrel into it, I would expect m4 accuracy and (if it has the same cylinder as the KWA m4) m4 FPS.

[MikeRarrmeh [64oz]]

Was wondering if all the internals were the same? Including the spring (sr5 is chronod around 340 and sr10 is 390-400) I didnt know if that FPS difference would just be the barrel length which doesnt seem right, but they both shoot around 1200 RPM with the 11.1 lipo so *shrug* maybe they have the same spring

Just FYI, the spring isn't what decides the RoF (unless you have an enormous spring in it, then it'll decide that you need to fire reeeaaally slow )

The spring is what shoves the piston foreward again after the motor pulls it back, thus shooting the BB out the barrel. The motor and gears are typically what decide how fast the piston gets pulled back, which in turn decides how fast your RoF is.



But yes, if both guns have the same spring, theoretically they should have the same FPS. Different quality air nozzles and piston heads and TTBs can affect the FPS a bit, but they shouldn't differ that much.

I know spring doesn't decide RoF, I was getting at that if the SR10 was 60 FPS faster than SR5, then it might be the spring making the motor work harder lower the rof by a small percent

[MikeRarrmeh [64oz]]

Don't listen to grease, he doesn't know WTF he's talking about.

Barrel size can effect FPS depending on what length barrel and what cylinder (ported, not ported) you have. A different spring is the most common way to adjust FPS. I can't confirm what cylinder the SR5 has, but if you put an m4 length barrel into it, I would expect m4 accuracy and (if it has the same cylinder as the KWA m4) m4 FPS.

Is ported where it hooks into the cylinder making it not able to fall out?
Also what are the "windows" for on a cylinder, to relieve excess air?

Yeah on another forum someone said its the same ported cylinder, but if someone knew if it was the same spring that would answer alot of my qs lol

Because if so im going to go for the sr5 and extend it to m4 length

[Variable]

The "windows" are the ports. A ported cylinder has those. If your SR5 and SR10 have the same kind of cylinder, then with a similar barrel they'll get similar FPS.

[DMitri]

Is ported where it hooks into the cylinder making it not able to fall out?
Also what are the "windows" for on a cylinder, to relieve excess air?

Heh. Window and port[hole] are synonymous, so...

One function of the port is to allow the piston to get to full speed before acting on the bb, on replicas where the volume of air left after the port is sufficient to expel the bb from the barrel, generally m4s and shorter can accommodate a ported cylinder without worry, there are also different arrangements for different replicas.

They aren't necessary but some people swear by them.

EDIT: Beaten, partially.

[MikeRarrmeh [64oz]]

ohhh, port, window. makes sense hah. so i guess if they have the same spring the sr5 is for me and ill just extend it to m4 length and use a silencer

[Chachi]

I'm sure you have already spent some time here, but these are the links to the SR5 and SR10 product pages on the KWA website, and the FPS that they say each shoot at:

SR5 (330-350 FPS)
http://kwausa.com/products_sr5.html

SR10 (380 FPS)
http://kwausa.com/products_sr10.html

It does not specify what spring is used though. I have the KWA KM4 RIS, and while it is rated at 380+ FPS, the folks at KWA put it on a chrono when it was at their facility having work done, and they said it "averaged" 400 FPS.

[Junto]

Get the SR11. It's one step better than the SR10.

Kidding aside, get the SR10. Barrel length is important, even in short range.

[MikeRarrmeh [64oz]]

Barrel length is important, even in short range.

i know it is, the point of this is finding out if i put a m4 length barrel and silencer on sr5 if it will match up with the sr10 in fps due to spring i like smaller guns as i run

[MikeRarrmeh [64oz]]

well i did it, got the sr5, a 363mm 6.03 (m4 length) barrel, and madbull blackside barrel extension also got a Guarder SP120 spring because I actually did find out it only has a m110 spring inside, so after the 45 day warrently ill put it inside :]

[Mini-Marine]

I'm sure you have already spent some time here, but these are the links to the SR5 and SR10 product pages on the KWA website, and the FPS that they say each shoot at:

SR5 (330-350 FPS)
http://kwausa.com/products_sr5.html

SR10 (380 FPS)
http://kwausa.com/products_sr10.html

It does not specify what spring is used though. I have the KWA KM4 RIS, and while it is rated at 380+ FPS, the folks at KWA put it on a chrono when it was at their facility having work done, and they said it "averaged" 400 FPS.

KWA's tend to shoot hotter than advertised.

My old MWA M4S was shooting about 411, my KWA SR10 is shooting about 408

[Grease]

Don't listen to grease, he doesn't know WTF he's talking about.

Barrel size can effect FPS depending on what length barrel and what cylinder (ported, not ported) you have.

Yes, but they dont change FPS nearly as much as a different spring would. Two guns with the same spring would have similar FPS.

[Mini-Marine]

Not necessarily

Wombat6 was using an M90 spring in his rifle and it was still shooting over 400. There are many factors that contribute to FPS besides the spring power.