I was looking at the factory buffer, in my S&W/Magpul Middie, and it is not marked. How do I tell if this is a "carbine" or "H" buffer?......or since it's not marked it is a "carbine". I replaced the factory buffer, with a Spikes T2, but I think it's slowing things down too much.
The reason for a mid-length gas system is that it cuts off the early abrupt pressure peaks in the cycle that you get with a carbine system, smoothing the whole cycle out. If made to spec, you should not need a H buffer.
The reason for a mid-length gas system is that it cuts off the early abrupt pressure peaks in the cycle that you get with a carbine system, smoothing the whole cycle out. If made to spec, you should not need a H buffer.
Scott,
Thanks for the data. I think the issue with the T2 is that I also replaced the buffer spring, with a heavy Tubb spring. It slowed things down too much. The ejected brass seemed like it was just falling out instead of ejecting away.
I took an "H" buffer out of a Noveske and it ran perfectly.
I took my M&P out for the first time since changing to a midlength barrel this weekend. I had already had the Spikes H2 buffer in there because it was over gassed out of the box and had timing issues ie: "FTE and FTF". Anyways, I found that after switching to the midlength gas system that I did need to go back to the original buffer. I had a couple of FTE and had a situation where the bolt jammed on top of a half stripped bullet. Shot flawless after the switch! I was shooting a variety of 62gr and 55grs though, the H2 might have been ok with heavy heavy ammo but im looking for overall reliability.