H3 Buffer

[Iraqgunz]

An M4 with MILSPEC port will in fact run an H3 (USGI). Mine is currently set up with an A5H3 and Sprinco spring.

Same here, all my carbines & pistols run at least H3 buffers. A stock A2 rifle buffer is 5 oz. so no reason an M4 carbine can't run one.

For me, I just like slowing things down, take some stress off the extractor. I know some say a lighter buffer is more reliable when things start getting dirty but I prefer to go with as heavy a buffer as I can reliably run, and I'll handle keeping things clean.

[markm]

I'm running a H3 in a Noveske CHF 14.5" Mid-Length. I've tried an A5H2 but that didn't seem to do much to slow it down. Ejection was 1/130. Ammo was AE223 and PMC Bronze223. I feel like it shouldn't have to run a H3. I have an older Noveske Afghan that runs great with just a H buffer.

14.5 middies are really port size sensitive. They run great with H buffers at BCM's spec. of .077+/-. At .080", I've found an H2 or Vltor H2 to be just right.

Noveske has had some nicely ported barrels, and Jenna Jamison ports as well. For an A5H2 to not make a difference, I'd be concerned.

[sig1473]

14.5 middies are really port size sensitive. They run great with H buffers at BCM's spec. of .077+/-. At .080", I've found an H2 or Vltor H2 to be just right.

Noveske has had some nicely ported barrels, and Jenna Jamison ports as well. For an A5H2 to not make a difference, I'd be concerned.

I agree. Maybe it's just in my head but it's really beating the shit out of the side of the deflector. Thinking of getting an A5H3 and some SpringCo springs to help smooth things out.

[markm]

I agree. Maybe it's just in my head but it's really beating the shit out of the side of the deflector. Thinking of getting an A5H3 and some SpringCo springs to help smooth things out.

If it's a lo pro gas block, I'd buy an adjustable gas block. Much better to regulate the gas than to treat the symptom. If it's a fixed FSB, I'd get an insertable port.

[RobertTheTexan]

Since the topic started touching on 14.5 mids. I have a 14.5 mid, BA Hanson barrel and using my base config, had a A5H2. Immediately I had feeding/extraction problems. It took going up to an H4 to get the weapon to function reliably and consistently H4 and a standard A5 Spring. I've tried running some different springs, Tubbs flatwire , Sprinco Red (it was the only non A5 Spring I had) but it produced inconsistent results. With the H4 it really does run all day and run well. It's a very smooth shooter, but to be honest I have this little thing in the back of my mind about it being so finicky. I just really don't know what else to address gas-wise. My thought has been to run it how it works. I usually shoot 62gr and occasionally 55, but 90% 62gr.


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[Canonshooter]

My BCM 16" mid length runs fine with a H buffer in a carbine set up, and now just fine with an A5H0. Ejection is consistent with .223 Gold Dots, XM193 and some 69 grain hand loads. Operation seems smoother as well with the new A5 set up - any reason for me to experiment with other A5 buffers?

[Iraqgunz]

Do whatever is clever. I run my mids with an A5H3.

My BCM 16" mid length runs fine with a H buffer in a carbine set up, and now just fine with an A5H0. Ejection is consistent with .223 Gold Dots, XM193 and some 69 grain hand loads. Operation seems smoother as well with the new A5 set up - any reason for me to experiment with other A5 buffers?

[Locutus]

If it's a lo pro gas block, I'd buy an adjustable gas block. Much better to regulate the gas than to treat the symptom. If it's a fixed FSB, I'd get an insertable port.

Would you mind expanding on that a bit? I'm familiar with adjustable gas blocks, but not insertable ports. I saw another thread where someone was making what sounds like this using set screws drilled out to different sizes. This sounds OK if you can easily remove the gas block repeatedly until you find the port that works best, but is that a good idea with a pinned FSB? My fear would be that repeatedly removing and reinstalling a FSB would waller out the pin holes in the FSB and possibly even the slots drilled into the bottom of the barrel when the FSB was first fitted. Am I making sense here?

[556BlackRifle]

Here's a link to Clint's sight. link

[sig1473]

Mine is a 14.5" w/FSB and pinned BattleComp. I'm not going to have it unpinned so the SpringCo and A5H3/H4 are the bandaids that I foresee.