What not put the originals back or downgrade rather than stay with something that isn’t working as well as you hoped it would?
Why not go with a 14.5 carbine instead. The 14.5 carbine gas with the standard H buffer is very ammo tolerant and will fire everything from full power 5.56 NATO down to the weakest reloads. Plus you don’t have to buy a buffer collection to support your carbine.
I’ve owned four. One CMMG. Two Sabre Defence. One BCM. None have been ammo sensitive. All have had H buffers.
To give a couple more examples and echo what has already been stated:
- CMMG (likely overgassed) ran everything fine with a ST-T2 buffer
- BCM ran everything fine with an H buffer
(Both with BCM auto carriers and standard carbine action springs)
They didn’t have any 14" versions at the dealer up here so I had a choice between the 10.3 or a 16". So I ordered a Daniel Defence in a 10.3. It is the mk18. So I hope I won’t have any problems with ammo.
Ha! It is your fault Buford!! It’s cool though, and I will eventually default it back to its working state I just keep it to tweak. I mostly shoot my 6720 which cycles everything under the sun.
Sent from my iPhone using Tapatalk; coherency may be in jeopardy.
My bcm runs like a damn turbo diesel
I have 2 bcm lw mid with 14.5 barrels.
Both have standard carbine springs and H buffers
I shoot mainly 223 tula. I had 1 fte with tula recently. Most likely needed lube.
Have shot a bit of 5.56 in it too.
I really can’t complain. I’m quite happy with my setups
I have a Bravo Company Manufacturing 14.5" barrel with mid-length gas system and it has run perfectly on both 5.56 NATO and .223 Remington, with standard carbine recoil springs and buffers from carbine to H3.
Cameron
Cameron, with that gorilla upper half you have, that rifle’s just scared to not cycle whatever you feed it…
My BCM 14.5" runs strong, but choked a few times on Tula when I was out with Munch520. It could have been the mags or the mix of brass and steel though, I can’t say for sure and wasn’t too concerned about it. Other than those few rounds, the other six or seven thousand have been good.
I looked but can’t find it, could you link that thread for me? Thanks.
I have a BCM EAG upper that would have issues with Tula/Armscor/etc for about the first 2-300 rounds; since then I have yet to encounter any further issues (rifle has about 3K rounds on it now). I fed it a steady diet of XM193 for the next 1K or so.
My main plinking/range round is PMC bronze and my bolt locks back 100% of the time; I use an H buffer and BCM carbine action spring.
I briefly had a BCM EAG upper and it functioned fine with American Eagle .223 with H and H2 buffers.
I couldn’t even tell a difference between the buffers.
In case you missed my previous post, your situation has nothing to do with the topic at hand. I can assume that you have very little knowledge of the system and you could probably do some reading here.
If you have a question about your particular set up then post it in the NFA or Technical area.
Here you go, Jon. 
Last week when we went shooting I pulled my LMT enhanced carrier from my SBR and dropped it into my 16" carbine with the Vltor A5(H3) buffer and fired it using M855. It ran 100% with no issues.
My 14.5 Mid has had zero problems so far with anything I have fed it.
Uh no Cameron.
We’d rather see pics of how the ‘better half’s’ middy shoots. 
-Jax
I’m running a BCM 14.5" middy with the standard spring it came with and a H2 buffer and have had no issues what so ever. I put about 3000 rounds down range and have used everything from Tula( very little of it) to m193 and it’s ran perfectly.
Another BCM 14.5" Middy here. Standard spring and H buffer with no issues using even weak .223 ammo.