I just bought a used LMT lower that came with an H buffer. I also just purchased an LMT upper with a Noveske Afghan middie 14.5" barrel. Should I replace the H buffer with a standard right away, or should I try it out first and see if there are any problems at all? Also, are the spring rates different between the two as well, or are they the same?
check this out…http://m4carbine.net/showthread.php?t=23001 This should help a little
I would shoot it first. I think you will find it works just fine with the H.
Give the H a try. The Noveske 14.5 with the middy gas system would be the only one that might not lock back, but it really depends on the type of ammo you shoot.
For springs, I would just shoot a standard carbine buffer spring.
C4
I have had three (still have two) 14.5" mid-lengths with H buffers. They all worked 100%.