I suspect the hammer spring legs are not setting in the grooves in the trigger pin. Not an uncommon occurrence for a hammer spring which is not orientated correctly. The legs of the hammer spring resting in the grooved trigger pin normally retains the trigger pin. The Geissele G2S trigger uses an e clip and if not used the hammer pin will move out on recoil.
I bought a PSA 12” pistol kit and with the mil spec trigger and 1-6 Strike Eagle I couldn’t get decent groups. I installed a RRA NM trigger I had in my parts bin. I pulled the 1-6 scope and used a 2.5-10-44 scope and I was finally able to get consistent 1-1.5 inch groups at 100 yards if I did my part. The AR-15 pistols are harder for me to shoot accurately compared to my other 16”, 18”, or 20” AR-15’s.
There are picture of AR-15 hammer and triggers with the springs in the correct orientation in the link.
https://www.ar15.com/forums/ar-15/Assemb...4-226782/?
I bought a PSA 12” pistol kit and with the mil spec trigger and 1-6 Strike Eagle I couldn’t get decent groups. I installed a RRA NM trigger I had in my parts bin. I pulled the 1-6 scope and used a 2.5-10-44 scope and I was finally able to get consistent 1-1.5 inch groups at 100 yards if I did my part. The AR-15 pistols are harder for me to shoot accurately compared to my other 16”, 18”, or 20” AR-15’s.
There are picture of AR-15 hammer and triggers with the springs in the correct orientation in the link.
https://www.ar15.com/forums/ar-15/Assemb...4-226782/?