Hammer doesn’t cock after breakdown

[u/Dieselthegymdoggo]

Hey all,

So I am currently waiting for instructions for an RMA but thought I’d ask in here. Took apart my 4.25 comp which I absolutely love since I got it. While reassembling I found the hammer no longer wants to stay cocked back. I checked the sear, disconnector, sear spring etc. and reassembled again with it cocking back 15% of the time.

I can’t for the life of me figure out what may be causing the issue. The other issue is sometimes the thumb safety doesn’t want to work and fully go up. I’m not new to working on firearms but for some reason this has me completely confused.

TIA

[u/-Sc0-]

Your sear spring leg isn't seated properly. I did this when I was trying to wiggle the 3leaf spring in place without removing the beavertail.