This post is for anybody with a Sig Sauer P226 X5 C02 pistol. This mod might work for the cyber gun or a regular p226 but I have only done the mod on my X5. It was actually not very difficult. However, I do want to say that I am not responsible for any injury you my have or cause from these upgrades. It does make the gun very powerful. I am able to sink pointed pellets well over an inch into normal 2x4s.
Originally I wanted to run HPA to get the consistency and power up on the gun. However after many attempts to find an HPA adapter, and trying to build my own, I was at a loss. Next I tore the gun down and pulled the valve apart to see what could be done here. The valve is very easy to disassemble and bore out. After the mod I am getting well over 500fps from my hand gun. It is a C02 hog and its LOUD. However it is well worth the cost for this. It is just as powerful if not more then my MCX. If any body is interested in this mod please let me know and I can give you step by step instructions as you can mess the nylon o-ring up if you disassemble the valve wrong. But its completely free and only requires basic tools, a hand drill, with a small (1/8in) drill bit and some attention to detail.
Other mods I have done are - vent holes to help with C02 freeze up on fast firing, and venting for over heating of the C02 causing the hammer to not be able to push the valve in. Stiffened up the blow back spring. I know this doesn't improve power, and in some cause can actually take power from the gun. Well it does on this gun because with the added power of the valve work, a stronger spring keeps the valve open longer and all the semi auto actions work correctly. Lastly the barrel on these is loose from the factory. Its not bad, as it looks to be designed this way and it seals when the gun fires but it does cause the gun to seem very inaccurate. The gun its self is accurate, but with this problem it SEEMS inaccurate. The barrel locks up when fired but this can change where the sights were pointed.
Just a bit of work and this is now a very powerful gun that is pin point accurate. The two main problems most people have with the gun. Honestly I think Sig could have shipped out the gun from the factory this way but this gun would be illegal in any areas where a gun over 500fps is considered a firearm. So by keeping the valve restricted a bit they can keep the power in the 350fps range, making it legal everywhere.
My next challenge will be to do the same mod to my MCX, however from research I believe this is a bit tough to disassemble. If anybody has torn down a C02 MCX, and has any tips please let me know.