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Old 07-29-2012, 01:18 PM
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Default Do the middies have a carbine or H buffer?

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.
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Old 07-29-2012, 01:53 PM
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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.
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Old 07-29-2012, 04:32 PM
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Quote:
Originally Posted by MichiganScott View Post
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.
Thanks, but that's not what I asked.
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Old 07-29-2012, 04:52 PM
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Don't have an answer but interested as well. Just put the ST-T2 in my middie (not my M&P) and it runs like a champ.
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Old 07-29-2012, 08:56 PM
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Sorry. Read your post again. It most likely came with a carbine buffer if not marked.

The only way to tell for sure is to weigh it. Brownell's lists the weights as:

H Buffer: 3.8 oz
H2 Buffer: 4.6 oz
H3 Buffer 5.4 oz

Standard carbine should be 3.0 oz
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Old 07-29-2012, 09:34 PM
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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.
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Old 08-06-2012, 01:36 AM
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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.
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Smith & Wesson M&P15 Rifles Thread, Do the middies have a carbine or H buffer? in Smith & Wesson Rifles and Shotguns; I was looking at the factory buffer, in my S&W/Magpul Middie , and it is not marked. How do I ...
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