how to choose a carbine buffer...

hi guys
i shoot .223 ammo in my 10.5 OLy
with standard buffer.

i boght a h2 and h3 buffers…and tryed tonight…few ammo…

in my idea…heavier buffer should reduce felt recoil…
but… when i used the h3… well… i felt more recoil than with the standard buffer…
so my question…
is my idea right?
wich buffer is the right one??

last question…
could i have damage using a heavier buffer?

thanks
andy

I’d probably say the one that came with it unless there is a deficiency you are attempting to correct. Recoil is filed under ‘Symptoms of operation’.

there was a thread on here somewhere, couldn’t find it, that talks in depth about the “correct” buffer for what you need.

One of the discussions was somewhere along the lines of a heavier buffer moving slower but obviously having more force due to the weight, whereas a lighter buffer would have less weight ,but being “snappier” for lack of better words.

holy terrible information being put out here. Really, trying to reduce felt recoil with a buffer, please. Get a .22lr conversion if thats your goal.

A buffer has zero to do with “felt recoil” and all to do with making your gun run correctly. It has a lot to do with where your gun is ejecting the brass. If the gun is ejecting the brass in the right place, then its the right buffer. You need to look at the ejection pie chart and see what you can do to your gun to make it run correctly. If its short stroking you can also use the chart to determine a fix.

If the gun was ejecting brass correctly with a carbine buffer than that was the right buffer for the setup. If its not running right, change things up, but for the love of god, dont do it to “reduce felt recoil”.

wasn’t giving any technical advice, was merely quoting a previous discussion on M4C. And I agree with you, its very silly to change buffers to try reduce recoil.

Basic breakdown.

CAR length gas system? At least an H buffer. CAR will run great with .223 pressure ammo but it’s a little light for high round counts with 5.56mm NATO pressure ammo and will accelerate wear.

If a gas port larger than .062" or using a sound suppressor you might need an H2 or heavier.

Take the buffer out completly, this helps felt recoil by 80%…

guys
im a newby…
if anyone tell me things , or teach me… how can i know??

btw…
does a short barrel using a heavier buffer?

Yes generally so. Typically the shorter the barrel gets the larger the gas port gets. The CAR length 14.5" and 16" barrels are already over gassed. Making the barrel shorter and thus the gas port larger compounds the problem. To ensure that the rifle doesn’t run too fast a heavier buffer is needed to slow the cyclic rate down.

how can and where measure the gas port??? howi know if it is large or not?

You have to remove the gas block or FSB whichever you have.

What brand of barrel, I can probably take a very educated guess of it’s size looking at the history of some barrel makers.

well the gas port is a larue low profile. it is new
the barrel is a 10.5 Olympic arms
the rifle is a k3b car15 (10.5" barrel and 5.5" flash hider)

With an Oly bbl I run a H2 or H3.

thanks
what BBL mean?

Barrel

Were you thinking of this?
http://m4carbine.net/showthread.php?t=6827

I did lots of reading here before I actually joined. From what I’ve seen, if I ever have a question I need to research it for a solid week before asking a question for fear of the members’ reaction here!:wink:

negative. Thank you for checking though:) I do the same thing.