Lookin for Piston options for SR25, R25, L85...

[pastormark_m]

Hi Everyone

I ave been using a g&p long piston in my L85 and I am wonderin if anyone make an aluminium version? Is the g&p or the CA the better of the plastic pistons?
(I thought about switcin to a 16 tooth piston, but you loose about 8-10 mm of piston travel, which take s away from air volume> its like giving up a bore-up on steroids for a stock setup!)


Thanks

God bless...

Mark

[BIO]

Hi Pastormark,
You can install a standard TM or like piston with a standard sector gear and a 10mm spacer, then it will function as a normal AEG,with less issues.
Beanns sells a very nice, light aluminum spacer he makes for this fix.
This is the setup I have been using on my G&G L85 for about 3 years now.It shots 422 FPS with .20 and has very good distance.It broke for the first time yesterday,just a piston head.
I have also installed the same set up on an Army L85.

[pastormark_m]

Hi Bio,

thanks for the input. If I was sticking with the 510mm barrel it would make total sense, but I am going to use a 650mm barrel, so the more air behind it, the better to overcome the added barrel length, so that's why I want to keep the longer travel setup in place.

Thanks

God bless...

Mark

[BIO]

OH,OK good luck.

[pastormark_m]

Hi,

Thanks for the input. Hopefully I can make this thing reliable w/o the conversion Just curious, what spring are you using to get 422fps?

Thanks

God bless...

Mark

[BIO]

I'm running a Guarder SP120.
With the stock set up I couldn't keep it from breaking pistons.

[pastormark_m]

Hi,

Yeah due to the longer piston, you have to have an M110 or M120 to move the piston forward fast enough so the spur gear doesn't get back around and grind on the piston teeth. I found on mine that the stock spring was so weak that it would grind unless I left the bolt blow back engaged because the extra push from the spring in that part of the gun helped keep the piston faster than the gear! (Talk about cutting it close on spring tension!!!)

God bless...

mark

[pastormark_m]

Hi,

Oh yeah, the big thing I also found was that the piston and piston head was too short. I put about 1-2mm spacer in between the piston and piston head so the piston teeth line up correctly with the sector gear as it comes around. (Too far forward and the rear tooth gets gouged up too far back and the second tooth gets the top cut off of it.)

I found that and the spring tension issue were what I had to fix to make this thing work properly.

God bless...

mark

[BIO]

On the Army L85 I had to also shim the piston and piston head.(ICS piston and King Arms head)
On the G&G the length ended being just right with a Guarder piston and head
when I jammed the gear box on the G&G last Sat. it was only the screw that came out of the head,a little thread lock and it was up and going again.Not to bad, almost 4 years on the gear box.

[pastormark_m]

Hi,

SO in my quest for a tougher long piston, I have only found the g&p and this psg-1 aluminium piston which sounds great, but its a 1/2 tooth piston. Is there any to make this work on my L85?
http://www.airsoftextreme.com/store/ind ... ts_id=1267

Thanks


God bless...

Mark