Thanks for the reply. I've actually replaced the hammer spring and it's exactly the same. I know it's an odd analogy but it basically a little like when you put a ruler on the edge of a desk and twang it. Exactly like that. It's very odd.
Hi all.
Hope someone can help. I have an issue with one of my G&P M4's. I'm getting hammer bounce. The rif is firing twice with every trigger pull.
If I take the upper off and reset the hammer and pull the trigger I can see the hammer bounce when it fires rather and just hitting once. Any ideas on what part I need to replace?