Could be a spring that wasn't fully seated. Maybe the trigger bar and dosconnector weren' quite lined up properly. Hard to say for sure. Glad it's fixed for you now.
Glock 19 G4 BFG | Glock 17 G4 FDE | S&W M&P 22 | S&W M&P 45 | S&W M&P Shield 9 | Ruger GP100 4" | Sig P226 MK25 | Sig P229 Extreme | Sig P320F | Sig P320C | HK USP 9 | HK USP 45 (Tan) | Walther PPQ 9
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