Many after market drop in triggers use modified hammers and can be temperamental in Blowback systems. For the most consistent results a mil-spec fire control group is recommended. However, in our testing, these aftermarket fire control groups should work in most circumstances: POF, Hiperfire EDT and 24 series, Geissele, Timney, Rock River, and Spikes.
9MM BCG Features:
Glock or Colt Compatible
USA made 8620 Steel Carrier Construction
Nitride QPQ Finish
Heavy Firing Pin Retaining Spring