Bought an SR-25, is it Upgradable?

The beauty of a DMR though is you can use it as a assault rifle or a DMR if you choose. Okay maybe not 450 FPS with a .25 g bb but somewhere around 400-420.

I would focus on making it a good DMR, but still give you the full auto / 3 rd option.

Then if you still don't like being a DM. Sell it for a reasonable amount and get the KWA SR12 which gives you a longer barrel w/ the assault rifle look. That or a 416.

True, Lonewolf you sir are a genius.
Would I need that piston then?

Also, which spring shoots 510 FPS with a .20

I would strongly recommend a reinforced piston, reinforced spring guide, and a new piston head.

As for spring tension. SP 160-70 should do it.

Soo my shopping cart should contain...

Piston
http://www.airsoftpost.com/product_info.php?products_id=28898

Spring Guide
http://www.airsoftpost.com/product_info.php?products_id=26298

Spring
http://www.airsoftpost.com/product_info.php?cPath=24_62_335&products_id=26261

I decided to go with an m140, (i couldn't find a SP-160, and I realized one thing. If I had a powerful spring, and say my gearbox cracks. I"d be screwed...)
My friend does have a method to reinforce the gearbox end, but for now i'm going with the M130.

High Torque Motor?
http://www.airsoftpost.com/product_info.php?cPath=24_73_381&products_id=29935

Shims..
http://www.airsoftpost.com/product_info.php?cPath=24_77&products_id=29067

What do you think guys, everything look good?

Piston should be a full metal tooth,
I Have to double check on the Spring guide, I believe a standard V2 spring guide will work.

If you want a good trade off from motor power and speed, may I suggest going with a Systema High Speed, the M130 is IMHO the best possible spring for that motor, and delivers a phenominaly evil ROF when needed.

The PIston does have a full metal tooth, 3 actually.
And 95 bucks for a motor? Ouch, I can buy the WELL G-55 with that price.

Any other substitute for a motor slob?

Eagle force HUMMER;

CA High Torque,

Full metal tooth means, metal teeth the entire length of the piston

Not this piston but similar, the entire tooth rack should be metal,
http://www.airsoftpost.com/product_info.php?cPath=24_75_393&products_id=27828

This piston work?
http://www.airsoftpost.com/product_info.php?products_id=30841

But if I use that, i'd have to find a piston head, which one should I use? Polycarb or alunimum?


And this is the motor I need?
http://www.airsoftgi.com/product_info.php?cPath=31_50&products_id=135

Yes that is the piston you need.

Now earlier you linked to a G&G Motors, I know several people that have good luck with them just to throw that into your decision making. But the CA motor would do just as good.