[pestobanana]

So I'm duped. My M14 doesn't necessarily have a bad air seal, it will shoot whatever speed in m/s the spring is rated for. I'm looking to get it up to the level that my other guns are at. My G36 gets 445fps with my M120, but my M14 gets 40 fps lower than that with the very same spring. At one point my G36 was getting 405FPS with a M100.

I've checked air seal in the gearbox and it's perfect. I've also swapped and played around with every single air seal component, without much of an increase in efficiency.

Any ideas on what it might be? Help and suggestions appreciated!

Here's a list of parts I've tried:

Hop up unit: CA metal, Lonex
Hop up rubber: CA stock, PDI W-Hold, Guarder Clear, A+70, Prometheus soft
Barrel: CA tightbore, Prometheus 509, Prometheus 550
Cylinder: CA stock, Modify
Air Nozzle: CA stock, Modify AUG, Lonex M14
Piston: CA yellow, Lonex Red, Modify Quantum
Piston Head: CA metal, Modify Aluminum, Lonex POM, King Arms metal