Just got my SBR stamp back and I have decided to get an 11.5 CQB SR-15 MOD 2 upper. The lower I have started with is, a BCM A5 with BCM action spring and Vltor A5H0.

I am thinking about replacing just the buffer with an A5H2, and I am wondering if anyone else has had any experience with this combination, or if I should go with a heaver/lighter buffer, or stiffer/softer action spring such as the Sprinco green, or colt?

This rifle will be shot unsuppressed and also with a 7.62 omega.

Thanks for the help.