Buffer problem

[grayfox]

Kind of what I figured. That rifle buffer is too heavy. I had/have a couple rifle stocks, but in them I first load in a poly "buffer shortener" (I forget the actual term. Then a carbine length spring and buffer will work. (Carbine SCS too if that's your fancy.) And that same gear would work for the 223W upper too. But if it's working for you, load shoot and be safe.