Texas Sheepdawg wrote:Why do you need a heavier buffer?
Translation: Why do you
think that you need a heavier buffer? The 450b was designed to work with a conventional rifle buffer, whether it be in an A2 stock or Carbine stock. There are standard weight buffers for each. New builds typically take a while to "run in" because everything is new and rough as a rule of thumb. A heavier buffer would exacerbate that stiffness. If, once it is broken in and cycling gets smoother, you find that its swiping your brass, then you can entertain perhaps needing a heavier buffer. Ditto on the buffer spring. My original rig was a Bushmaster 20" with A2 stock, standard buffer and spring and it ran like a Swiss watch.I made a weight for the bolt carrier to delay unlocking a little to make life easier on my brass, since I reload all my calibers.
IMHO. the biggest mistake you can make is getting a barrel with too long of a gas system. That can make for a finicky to tune rig. Also in my opinion, if you're running a 16" barrel, stick with a cabine length gas system and if its a 20", then you can go out to a mid-length gas system. I do not recommend a rifle length gas system. Been there, regretted that.
Hoot