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AR Sponsor: bravocompany
Posted: 3/6/2004 7:07:19 AM EDT
What is the difference and advantage of an "H buffer from the regular buffer?

Thanks
Link Posted: 3/6/2004 7:52:30 AM EDT
[#1]
The "H" or heavy buffer is for the full auto M4, supposed to slow down the cycle rate and prevent mis-feeds and such.

I use one in my semi-M4forgery. Never had a mis-feed or failure.

Im sure that some of ARFCOM full-auto guys can say if the "H" buffer helps.


Link Posted: 3/6/2004 8:01:02 AM EDT
[#2]
Use the "H" buffer for shorter barreled AR15s.  
Link Posted: 3/6/2004 8:11:20 AM EDT
[#3]
Should I use a "H" Buffer for a 16" Barrel?
Link Posted: 3/6/2004 9:46:58 AM EDT
[#4]

The heavier buffers do tend to smooth out the recoil impulse and aid in extraction due to their added weight as they slow down the initial motion of the BC allowing the chamber pressures to drop off.

[url]www.biggerhammer.net/ar15/buffers[/url]

An interesting thread on buffer weights, BC weights and reliability...

[url]www.ar15.com/forums/topic.html?b=3&f=118&t=167694&w=searchPop[/url]
Link Posted: 3/6/2004 9:50:36 AM EDT
[#5]
Basic buffer weights-, should make no real difference in semi-auto.

Rifle - 5.2oz - works fine for full auto in both 223/556 and 9mm using any barrel length.

CAR - 2.9oz, aluminum body, not enough weight for full-auto use in both 556, semi is ok. I may try mine for semi 9mm use to see how it acts, as I have suppressor also.

9mm - 5.5oz, steel copy of the 2.9oz CAR, no need for it if doing 9mm with rifle tube/stock (unlike RRA claims), will need for full auto with CAR type stock-tube-spring.

H - 3.8oz CAR style buffer, for CAR tube/stock, typically found/used in full auto short barrel applications to control added rate of fire with shorter barrel/gas tube set-up (M4, 11.5", 10.5")

Special purpose buffers  designed for suppressed SMG's or 9mm carbines using high pressure (+P+) ammunition

A - 6.3oz CAR style buffer (9mm SMG)

B - 7.1oz CAR style buffer (9mmSMG)

X - 7.9oz CAR style buffer (9mm SMG)
Link Posted: 3/6/2004 11:56:07 AM EDT
[#6]
So is it all about the weight? Is there anything special about the h-buffer other than the weight?

What I'm asking is, I just got a new Vltor stock setup that will be going on a 14.5" M4gery. I ordered a new buffer with it but I don't know who made it\what it weighs? If it weighs in at ~3.8oz's or higher, should I be good to go?

Thanks
Link Posted: 3/6/2004 2:40:34 PM EDT
[#7]
should work fine. It is all about the weight.

I have had mine "H" for about 2 yrs and never had a problem.
Link Posted: 3/6/2004 3:11:38 PM EDT
[#8]
I have an H-buffer in my collapsible stock, but I am using a full 20" barrel.  Will that work just fine?
Link Posted: 3/6/2004 5:06:37 PM EDT
[#9]
Simple yes or no question:

Is there anything to be gained by running one of these in a 14.5 semiauto only M4?
Link Posted: 3/6/2004 5:17:43 PM EDT
[#10]
Yes.
Link Posted: 3/20/2004 4:44:28 PM EDT
[#11]
If you can slow down the opening of the bolt a little, this will be helpful in extending the life of your bolt.
Link Posted: 3/20/2004 5:25:41 PM EDT
[#12]
I use a H-Buffer on my 16" carbine and it works great.

My understanding is that the H-buffer will increase dwell time and let the gas pressure get to lower levels before the extraction begins.

With the lower gas pressures the case is not as expanded against the chamber's wall and extraction will be smoother and easier.  

Another good thing to have is the heavier or enhanced bolt carrier to go along with the h-buffer.
Link Posted: 3/20/2004 5:49:16 PM EDT
[#13]
Quoted:
I have an H-buffer in my collapsible stock, but I am using a full 20" barrel.  Will that work just fine?
View Quote


Probably [;)]
Link Posted: 3/20/2004 7:34:56 PM EDT
[#14]
Plan on using a 9mm buffer for my M4gery build; plus Id like to get a 9mm upper down the road.
Link Posted: 6/30/2004 6:44:16 PM EDT
[#15]

Quoted:
Simple yes or no question:

Is there anything to be gained by running one of these in a 14.5 semiauto only M4?



Extends bolt life and makes extraction easier.
Link Posted: 6/30/2004 9:06:25 PM EDT
[#16]
For a 16" M4 (Colt 6920), should one also change the recoil spring when going to an H buffer?
Link Posted: 7/1/2004 2:09:31 AM EDT
[#17]

Quoted:
For a 16" M4 (Colt 6920), should one also change the recoil spring when going to an H buffer?



I would just because I'm geeked.  I think I paid about $13 for the buffer from JTAC here on the boards and I think the springs are about $6 or $9.
Link Posted: 7/1/2004 4:39:15 AM EDT
[#18]

Quoted:
Plan on using a 9mm buffer for my M4gery build; plus Id like to get a 9mm upper down the road.



May be trouble...


Quoted:
What about the next heavier 9mm buffer?  in an M4, that is.





Quoted:
I've had cycling issues with that combination (short strokes)



/S2
Link Posted: 7/3/2004 11:13:06 PM EDT
[#19]
What I was really getting at is, does going to an H buffer require a spring with a different "power"?  Or, is there basically just one type of buffer spring available for a carbine?
Link Posted: 7/4/2004 12:50:50 AM EDT
[#20]

Quoted:
What I was really getting at is, does going to an H buffer require a spring with a different "power"?  Or, is there basically just one type of buffer spring available for a carbine?



More than 1 type of "CAR" spring, though none designed by Colt for their M4.  1 is the Wolffe extra power "Action" Spring, another is the Std. GI spring, and another is Stubbs, I believe it is.  Some here have used the aftermarket springs (Wolffe etc.)  w/ M4 buffers (H) and the std. buffers w/mixed results.
The use of the "H" Buffer however by no means necessitates the use of any extra power springs.


/S2

Link Posted: 7/4/2004 8:44:45 PM EDT
[#21]
Thanks SULACO.  So, sounds like I want to keep the stock spring and just add an H buffer to a Colt 6920 for enhanced reliability/reduced wear.  Anyone have a different idea?
Link Posted: 7/4/2004 10:15:48 PM EDT
[#22]
Did you buy a 6920 carbine, or replacement upper from one?   My semi-auto 6920 came from Colt with the H-buffer.



_________________________________________
Link Posted: 7/7/2004 5:33:32 PM EDT
[#23]
I don't have a 6920 yet, still using a M16A1 converted to semi-only for patrol.  Kisara, thanks for the tip on the H buffer being included, although it seems that there is more than one H buffer from Colt.  Another thread indicates an "HH" buffer and an "HHH" buffer.  I think I'll just wait until I get a 6920 and then call SAW about this and other possible reliability/longevity enhancing upgrades.
Link Posted: 7/7/2004 6:53:48 PM EDT
[#24]

Quoted:
I don't have a 6920 yet, still using a M16A1 converted to semi-only for patrol.  Kisara, thanks for the tip on the H buffer being included, although it seems that there is more than one H buffer from Colt.  Another thread indicates an "HH" buffer and an "HHH" buffer.  I think I'll just wait until I get a 6920 and then call SAW about this and other possible reliability/longevity enhancing upgrades.



I've only heard of regular CAR buffers, H, H2 and 9mm buffers.
Link Posted: 7/7/2004 8:15:05 PM EDT
[#25]
There H, 2H and 3H.

/S2
Link Posted: 7/8/2004 3:51:17 AM EDT
[#26]

Quoted:
There H, 2H and 3H.

/S2



So I'm assuming that a 3H has three tungsen weights versus the 2 in a H2, and 1 in a H?
Link Posted: 7/8/2004 4:35:53 AM EDT
[#27]

Quoted:

So I'm assuming that a 3H has three tungsen weights versus the 2 in a H2, and 1 in a H?



I'm unsure of the internal construction.  I've read that you've taken apart 1 or 2 so if the H has 1 Internal wt.  or at least a std. CAR + a Tungsten wt. and the HH has 2 wts. it would reason the HHH has 3 wt.s.  
The wt.s and differences in wts are H:3.7 Oz., 2H: 4.6 Oz., and 3H: 5.4 Oz.  What do the individual wts weigh?  That may be the answer right there.

Where you can get the wts from, I'm at a loss.  Sorry wish I could be more help.  If you find out please let us know.

/S2
Link Posted: 7/9/2004 1:30:56 PM EDT
[#28]

What do the individual wts weigh?

Having just done some research on this, the standard steel weights are about 18g while the tungsten weights are about 41g.  That's 0.63oz and 1.45oz for the metric impaired.  Or a 23g increase by swapping tungsten for steel.  (0.811oz)
Link Posted: 7/9/2004 2:13:27 PM EDT
[#29]

I'm just providing this information as a data-point.

I just bought a Colt 6400C (16" postban M4gery).  I haven't even gotten to shoot it yet.

It is, of course, stock and NIB.


The buffer on it has a "H" in the middle.


FWIW

Battler.
Link Posted: 7/10/2004 11:46:50 PM EDT
[#30]
How about the plastic buffer?  I forgot who all supplies them in the kits or in the rifles but do they weigh the same as standard buffers?  Do the plastic only come in rifle length?
Link Posted: 7/12/2004 11:32:45 AM EDT
[#31]

Quoted:
How about the plastic buffer?  I forgot who all supplies them in the kits or in the rifles but do they weigh the same as standard buffers?  Do the plastic only come in rifle length?



Those are really cheap.  Sometimes they cause bolt bounce, most are filled with shot instead of solid weights.  
Link Posted: 7/18/2004 8:50:38 PM EDT
[#32]
A LEO friend had the plastic shot filled buffer in his carbine, and had been fighting doubling.  I put a new CAR stock assembly on his carbine, and gave him a regular carbine buffer.  

He told me later that he switch back and forth between the metal and plastic buffers.  He consistently got doubles with the plastic one, but not the metal buffer.
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