Help with vsr-10 sniper repair

[nutty]

I have a TM VSR10-G spec with 

Upgrades installed

EdGi 430mm bull barrel.

Laylax barrel spacers.

90� zero pull trigger.

Laylax piston.

Laylax cylinder and cylinder head.

Laylax spring guide.

Action army hop up unit.

Maple leaf 60� autobot bucking.

Maple leaf omega nub.

 

 

I baught this 2nd hand 4 years ago used it 3 times then stopped playing, I have recintly decided to get back into airsoft as I have free time again and I installed a new Action Army Vsr-10 M150 Spring but im only getting 260 fps so I thourght somthing may be broke. I took it all apart re-lubes it all with silocone spray. when I got to my buckshot it looked ok no visable tears but old. here are photos anyone got any suggestions on what I need to do?

 

[concretesnail]

M150 and only 260 fps, I'd be going straight to the air seal parts. Start with a flash rubber in the hopup and new orings they feel lubed but if they have lost a little mass then you'll be loosing the seal.

[nutty]

What flash rubber/ oring sizer would you suggest?

[concretesnail]

I'd look to maple leaf rubber and you can either by a box of orings to try sizes or search for a vsr10 piston oring , it's usually about 18mm unless the laylax change the cylinder inner diameter.