I don't have a lot of experience with these types of triggers, but I've tried out three different ones in the last month and two of them have had major issues with the disconnector getting stuck on the hammer sear and not letting go unless I force the trigger forward or flip the safety on. A drop of lube also solves the problem, but that's just a band-aid and I shouldn't have to do that. I've seen videos where guys will file down the hammer sear and disconnector to smooth it out if there's a burr, but that hasn't worked for me and I'm just looking for answers on whether this is a common problem with drop-in triggers or if I've just had bad luck.
1st trigger: Rise Armament RA-140 Super Sporting Trigger: (Zero problems)
2nd trigger: PSA Custom AR 3.5 LBS: (Major problems)
3rd trigger: CMC AR-15 Tactical FLAT 3.5lb Single Stage Drop-In Trigger: (Major problems)
1st trigger: Rise Armament RA-140 Super Sporting Trigger: (Zero problems)
2nd trigger: PSA Custom AR 3.5 LBS: (Major problems)
3rd trigger: CMC AR-15 Tactical FLAT 3.5lb Single Stage Drop-In Trigger: (Major problems)