Hop-Up Rubber Sleeves (Bucking)
 

I modified my SIG SG 552 which has the GWS SIG SG 556-Sniper Conversion Kit and 650mm inner barrel. It shoots about 440-450 FPS on 0.25g BB's.

I have a Firefly Hop-Up Rubber Sleeve (Hard Type) and a Prometheus Hop-Up Rubber Sleeve (Hard Type). The Prometheus feels stiffer than the Firefly. Which one would be better to use on my setup?

Use the stiffer one.

But the firefly has the H-nub effect!!

Personally, I'd use the firefly... They make SUCH amazing rubbers (but they do require about a 200 round break-in period)

Also, Do you have a bore-up kit in your gun? Because if you don't... your range is gonna suffer!

Yeah, that was what I was thinking. After all, I paid double for the Firefly Hop-Up Rubber Sleeve than the Prometheus! But the stiffer Prometheus just confused me a little.

Yes, I do have a bore-up kit on my gun. After talking to ILLusion, he was telling me that I would need one if I get the 650mm inner barrel.

Excellent.

Use the firefly rubber. They're amazing. I use one in my VSR-10 and I'll be using one in my AEG once it arrives :)

i never got that great of an accuracy from Firefly, I'd use the Prometheus

Well, from 30 feet away, with the Firefly Hop-Up Rubber Sleeve (Hard Type) and Firefly Hop-Up Buffer Rubber (Normal Type), I'm getting 1.5-inch groupings right around the center of the target. Not the optimum distance to test out accuracy, but that's all I got to work with. I'll test out the Prometheus and post back.

You may not get the greatest accuracy, but you'll get a greater distance, and when you've got a semi-auto sniper rifle, it favors distance over pin-point accuracy.

I can get 0.8 inch groupings(Measured) at 30 feet with a Prometheus or Guarder hop up rubber(or G&P, or TM).

0.9 inch at 40 feet, that was with G&P hop up rubber with Laylax Strike Chamber. Honestly Firefly lacks the consistency in shots

Really?

My VSR gets about 3-4" at 150 feet with a firefly bucking.

I find that the softer the bucking, the better the accuracy. As well, the harder the bucking, the more hop up is required to keep a level tajectory, and this actually causes you to loose fps.

As an experiment, take an AEG with a hard bucking and turn the hop up right off, then crony. Then set you hop up so that you get the standard flat tajectory you'd expect to game with, then crony.

I have noticed some varients of up to 25 fps doing this with 0.20s.

SHA DO

I noticed the exact opposite

Enjoy trying to field that gun at your local games, 440-450fps with 0.25g BBs is gonna net you around 470fps w/0.20g at the chrony.

I've noticed the same as Sha Do has. Depends on the gun, set up and ammo I guess. I was able to get my 360fps w/0.20g BBs MP5 to print a bit bigger than man sized clusters of 0.28g BBs at 200ft using a Guarder clear a couple years ago, and that was with the stock TM inner barrel.

My VSR-10's a freak.

Hop off it fires 400 FPS

If I crank the hop to max I get 465 FPS... My thoughts on this is that the BB gets held in place longer so more pressure builds up behind it... but other than that It's a head-scratcher.

You don't have a gas bolt installed, do you?

Nope, 100% spring.

Very nice, Im pretty much around the same area.

380fps w/.20g is doing a little smaller than a man sized target at about 200ft with 0.30g using a guarder clear and a stock TM barrel.

We rock! :D

Which Prometheus Hop-Up Rubber Sleeve were you using, hard or soft?

I'm not planning on gaming with this gun at all. It's just a crazy project gun of mines. I normally game with my TM SIG 552 which shoots about 355-365 FPS on 0.25g BB's.

So really, which hop-up rubber sleeve should I get for my SG 556-Sniper? I want more accuracy over distance.

Would the Systema Hop-Up Rubber Sleeve be any good?

Why not just try out different brands and types? You've seen enough suggestions above to see what's out there, and also have seen that some rubbers work better in certain guns than others do. Since you are asking us what hop up rubber will work best in your SIG 556 at the fps you want to run it at................... it'd literally take someone who has done the same to the SIG, which is what you are asking for. I've tried a few rubbers out in my M24 at close to 500fps, Guarder Clear and the RH65 both work well for me. But you have an AEG with a totally different hop up unit than other guns......

That's true, I'll go and try the others out and see what works best for me. They don't cost much anyways.

What about the hop-up buffer rubber/h-hop? Would that make a difference in gaining more accuracy?

No idea what that is, but the SIG I've found to be one of the most accurate guns I've played with (in the basement of course, I test fired one after installing a tightbore and 360fps spring, etc.). So don't expect the hop up rubber to make it any more than what you have already. Just try out a Clear,any others you feel like, then get back to us. Besides, it's an airsoft gun, don't expect amazing accuracy past 150ft, you'd typically be able to hit a person that distance, but don't expect 8 out of 10 shots on a pie tin though. All airsoft guns share the smae problems at longer distances, just because we are sending a light BB with a back spin on it through a really variable medium known as air.

The buffer rubber/h-hop/fishbone is the rubber piece that gets pushed down on to the rubber sleeve.

I know that I will never get pin-point accuracy out of an airsoft gun, I just want to be abe to get small groupings from abot 150 feet away.

But I'll get back to this thread after trying out other hop-up rubber sleeves and post up my results.

I've tried several different hopup rubbers, and of all of them, the Guarder clear one has given me by far the best range and accuracy. My MP5 had decent range - average for such a short gun. Installed one of the Guarder clear, and I couldn't believe the range I was getting. Test fired it at Border Wars 2 last year, and the guys who saw it couldn't believe I was consistently able to accurately tag a target about 150 feet away. As for range, I don't know.. The BB would just continue travelling in a straight line and out of sight...

And of all the ones I've tried, Systema have been consistently the worse. I got better performance out of a stock JG rubber and bucking than out of Systema. Haven't tried the Prometheus or Firefly yet to compare. I jsut stocked up on a bunch of Guarder because I know they work.

You're like the fourth guy saying that the Guarder clears are awesome buckings. That must really say something about it. I'm deffinately going to try one out.

Were you using a stock buffer rubber?

I used the Guarder ones that came with it. Haven't tried with alternate ones.

Now high velocities will wear out the soft rubbers a lot faster, but IMO, they're so cheap and easy to replace it's not worth it. I grabbed 8 of them so I would have spares. Worth every penny IMHO.

Prometheus soft, it will raise ur FPS by a bit as well

Same with Guarder. Installing one in my HK 416 brought the velocity up from 395 fps to 420 fps. Got an extra 15 fps in my CA M15. Not sure what it did for my MP5, as I didn't have a chrony before I installed it.

Cool, that's good to know.

Best reported hop-up bucking are Garder clear or systema with a scs nub, Prometheus purple with H-nub or stock prommy nub and firefly soft bucking with firefly normal buffer rubber. Any of those combinations depending on aeg type and used with a good hop-up unit will achieve good result.

2 year old thread?
:p

Does anyone know what would be a good hop up rubber for a KJW m4? Also how do you get to the rubber on that gun?y