Sr-25 question

[ShawnG36]

I recently purchased a CA Sr-25 URX, which I plan on turning into a DMR. With that said I have a question.

I know that in SR-25's the piston is considered the weak link in the gearbox. What I want to know is if anyone can tell me the pros and cons of an aluminum piston vs a polycarb piston.

[Aeacus]

In all AEG's, the piston is the weakest part of the gearbox. Would you rather have your cheap piston strip out or what not, or your gears?

[ShawnG36]

In all AEG's, the piston is the weakest part of the gearbox. Would you rather have your cheap piston strip out or what not, or your gears?

That's funny, I don't put cheap parts in my guns. The polycarb piston I'm looking at is around 50 bucks. That may not sound like alot of money to you but I can't afford to replace a piston every time I play.

[Bad Karma]

I recently purchased a CA Sr-25 URX, which I plan on turning into a DMR. With that said I have a question.

I know that in SR-25's the piston is considered the weak link in the gearbox. What I want to know is if anyone can tell me the pros and cons of an aluminum piston vs a polycarb piston.

The CA SR25 has a non-standard, elongated version 2 gearbox. Therefore pistons are going to be more expensive, polycarbonate or otherwise. Still, though, it is cheaper to replace a piston than a stripped gear. Plastic will fail well before aluminum or steel. So if you have a metal gear catching a plastic piston, you will strip that piston should something go wrong. But if you put in an aluminum one, you run a very high risk of stripping those gears instead.

I ran my CA SR25 for a very long time, and stripped a couple of pistons. It really isn't the end of the world and I always had good luck shooting the stock CA ones.There is no need to spend any extra money on an upgraded polycarbonate piston. They all do the same thing.

[GacktC]

This one will fit.
http://www.redwolfairsoft.com/redwolf/a ... odID=18593

[ShawnG36]

I recently purchased a CA Sr-25 URX, which I plan on turning into a DMR. With that said I have a question.

I know that in SR-25's the piston is considered the weak link in the gearbox. What I want to know is if anyone can tell me the pros and cons of an aluminum piston vs a polycarb piston.

The CA SR25 has a non-standard, elongated version 2 gearbox. Therefore pistons are going to be more expensive, polycarbonate or otherwise. Still, though, it is cheaper to replace a piston than a stripped gear. Plastic will fail well before aluminum or steel. So if you have a metal gear catching a plastic piston, you will strip that piston should something go wrong. But if you put in an aluminum one, you run a very high risk of stripping those gears instead.

I ran my CA SR25 for a very long time, and stripped a couple of pistons. It really isn't the end of the world and I always had good luck shooting the stock CA ones.There is no need to spend any extra money on an upgraded polycarbonate piston. They all do the same thing.

True. But I am going to upgrade everything in the gearbox. Like I said, It's going to be a DMR so it's going to be pushing 500 fps. And yes, it's going to be semi only.

[shogun]

this is the only aluminum SR-25 piston i could find

http://www.airsoftpost.com/product_info ... s_id=30841

that looks like the exact same design as the old JBU highspeed aluminum pistons(regular length) those things were a walking disaster, the rack teeth liked to shatter sending shrapnel flying around in your gearbox.

id stick with the polycarb, CA & G&P make them, and im sure Echo 1 will have them soon.

[LiquidSnak]

As everyone has said before, leave the inexpensive part of the gearbox to be your fail-point. But, you're going to do whatever you want as it sounds anyways, so I'm not going to waste time explaining.

[PanzerFaust]

And then there's the weight difference between poly and aluminum. The version 2 gearbox is prone to breaking up by the cylinder-head. If you're slamming a metal piston into the cylinderhead with a high power spring behind it, as you would in a DMR, your chances of breaking at that point increase. I can't imagine the enlongated SR-25 gearbox will fare much better. I'd go with polymer just for that reason.

[ShawnG36]

Panzer/Karma- Thank you, ya'll answered my question.