You may know some people have gotten Stampedes early, me being one of them. After toying around with it, I opened it up, and found out the best way to mod it. Because it is completely powered by a motor, the Stampede can only pull so much force, so there is a fine margin between it not firing, and being underpowered. I've found that the best spring to use is a stretched out Nightfinder spring. I know it is extremely erotic to stretch out springs, but by torching them and dunking them in water, they retain their shape. The AR is quite familiar, but alot smaller in comparison to other blasters, even to a Nightfinder. I chose to drill out mine, as it is pretty risk-free. Also, be aware that adding a more powerful spring will cause to gun to shoot significantly slower, but a 9v battery and aligator clips should fix that. Just replace one of the D batteries with the 9v, and RoF is almost normal. This slower shooting speed can be helpful, though, as it gives the magazine more time to chamber a new dart, reducing jams. With these mods, you can expect to get around 70 feet flat, and 100 angled. I'm not sure if an Angel Breech is possible, but I'm not really into barrel or breech replacements.
How the gun works:
It's been unknown to many people of how the Stampede works, but it's actually a pretty ingenious design. The plunger is stationary, and already on the catch. When the trigger is suppressed, the bolt assembly and plunger tube move forward, compressing the spring. When the bolt reaches the closed point, the catch releases, causing the plunger to go forward, firing the dart. Another spring pushes the entire assembly back into the default position.
I'll try to get pictures up tommorow if possible.
Edited by Floppyjack, 06 September 2010 - 08:55 PM.