[Red62]

You could try dripping silicone oil into the hammer system, which often does wonders for me. If that doesn't fix it, check these three questions:

1: is your magazine able to release the gas by pressing the output valve?
2: When you take your gun apart, can you feel the knocker protrude into the magwell when you pull the trigger?
3: With the slide off and magazine in but without gas, slowly lower the hammer. Does the knocker come in contact with the center of the output valve?

Yes: Y. No: N. Doesn't apply: NA

N, NA, NA:
you've got bad mags.

Y but no pressue, NA, NA
You're filling your mags wrong.

Y, N, NA:
Y, Y, N:
Somebody toucha your spagett!!!! I mean... Somebody either put in a wrong part or incorrectly.

Y, Y, Y:
Might be the hammer spring being too weak.