Ultimate Airsoft AEG Spring by ASG (Version: Green / M105 /345 FPS)

"got the m95 for indoor plinking, runs about 280fps with .28g out of my modded piston/stock hopup 303mm scarl

"Used multiple of these springs M95 and M125 for various guns! Performs very well and consistent FPS with 5 to 7 FPS marginal increase/decreases! Highly recommended!

"I've used over twenty of the M115, M125, and m135 springs in various replica types, and after thousands of bbs on each of the springs as well as accidentally storing guns with precock on for several weeks at a time, have noticed virtually no FPS loss. I use several guns that have had these springs in them for 2-3 years, and the springs are still shooting at the advertised FPS. These springs also shoot at the advertised FPS with a decent air seal.

Something I really like which isn't a pro or a con performance-wise is that these springs don't have that boingy noise after you shoot like some brands of springs do.

The only issue I have with these springs is that they're really long, which can be annoying when you're trying to close a gearbox that doesn't have a quick change spring. However, that's a minor issue when compared to the reliability of these springs.