[The Fish]

Have about 4,000 rounds thru my 9mm full size.

When should I replace the spring??

 

[coltman1985]

Unload and check gun is clear... check it two more times! Point upwards toward the sky and pull the slide back ever so slightly so that the barrel drops down out of lock-up. Release the slide! If it goes into battery it is fine.

 

[choochboost]

Unload and check gun is clear... check it two more times! Point upwards toward the sky and pull the slide back ever so slightly so that the barrel drops down out of lock-up. Release the slide! If it goes into battery it is fine.

Good advice.



Another sign is when your brass starts flinging 6 stalls over. M&P's, in my experience, don't tend to do that naturally, so when it starts happening check your recoil spring.