When I was at S.A.W. two weeks ago they said they run the H buffer on 16 inch carbeans. 14.5" and down and they start getting into the H2 and H3 realm.
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When I was at S.A.W. two weeks ago they said they run the H buffer on 16 inch carbeans. 14.5" and down and they start getting into the H2 and H3 realm.
I run an H, that came with the gun, on this. If it was giving me trouble, I'd try an H2 and see what happens. I happen to be of the opinion that you should find the heaviest buffer that will work (both suppressed and unsuppressed which ever is more finicky) and stick with that.
http://i134.photobucket.com/albums/q...1754-Small.jpg
http://i134.photobucket.com/albums/q...1759-Small.jpg
Thanks Rob_s. You zeroed in on exactly what I was getting at. I tried an H3 in my 11.5 inch Sabre, and it seemed to run it fine with mild ammo... hand loads and AE223
I'm wondering if I should go with something heavier than the H buffer on a full time basis.
I run an H3 because that is what Specialized Armament put in when they did the reliability upgrade on my 6933's. I can tell a difference between the H3 & H buffer when running the gun suppressed.
I was told that by Ken at SAW that the H3 buffer is the best for reliability in a Commando and H2 is best in an M4.
that's roughly what Tina told me. But she also recommended that I run UMC ammo..... draw your own conclusions. :eek:
On my 10.5", 11.5" and 12.5" guns I use H2 buffers. I also have pretty large gas ports. If they had smaller gas ports I could use lighter buffers. All three were made to run unsuppressed and suppressed.
My 6933's with H buffer were beating up firing pin retaining pins pretty bad until SAW put the H3 buffer in. I was replacing them at about 250 round intervals, now I have had close to 2.5K through one of them and the pin looks fine.
What's a good source for H2s and H3s? I might give one, or both, a shot in my 6933s.
H in the 10.5 LMT. Runs with M193 and 62gr Green Tip just fine.
As the port erodes, might consider going to H2.
www.bravocompanyusa.com
quick link to the buffers:
http://www.bravocompanyusa.com/Searc...?Search=buffer
Interesting.
I'm going to place an order for one of each with Bravo right now.
Who knows, if the H3 will run in my gun maybe it will reduce the blowback when suppressed.
My thinking always was (not sure if I'm right or not)
carbine buffer for 16" middies
H for 1.45"-16" carbine gas
H2 for 10.5"-11.5" carbine gas
H3 for super-shorties like the 7.5"
9mm for 9mms
Only reason I didn't take my own advice on the 6933 was because I didn't want to screw with what works, but I'll give the H3 a shot first and then the H2 if it doesn't work, and finally back to the H if neither work.
Interesting thought above re: gas port erosion and needing a heavier buffer.
I'm new to the SBR thing guys. Could someone please explain the mechanics behind why a heavier buffer for a shorter barrel? It almost seems to me it'd be the other way around. I mean an SBR struggles to get enough gas anyway, right? So wouldn't a heavier buffer keep even more gas from being used? I believe you guys, so I'm obviously missing something. Help! :rolleyes:
I have a Noveske SS 10.5" on LMT lower.
For me, the buffer weight matters a lot less than the buffer spring. Meaning, that I prefer to run a better CS buffer spring. Because they are stiffer, I just run H buffers in anything with a carbine gas system.
If I were to run a standard cheap $5 buffer spring, then I would be looking at H2's and H3's.
C4
We stock them: http://www.gandrtactical.com/cgi-bin...eywords=buffer
C4
You might find this discussion helpful/interesting.
Aw crap!! I fotgot to mention Grant at www.gandrtactical.com . You will get what you ordered from Grant. He won't send you an H3 if you ordered an H2;) .
FWIW, Ken at SAW also recommended to me via email that if you are running a 5.56mm 11.5" Colt (6933) suppressed all the time that the X buffer is the best for the gas system. This is a 9mm buffer that SAW sells. He stated that it will make the gun run optimal, but it will not be as reliable when running unsuppressed.
Keep in mind, I am just passing on info that I learned from asking questions. I was told that the 6933 with H3 & heavy duty extractor spring is the magic combination. Mine runs like the proverbial sewing machine.
Rob, although it is not much of a difference, I have noticed a difference in the amount of blowback and nastyness in my rifle in using the H buffer vs H3 buffer. I can especially tell the difference on the amount of junk that ends up on my mag and ammo. H buffer = greenish first 6 rounds in the mag after 3 shots. H3 has been better about it. I can also tell a good bit of difference at night shooting XM193, by the amount of unburnt powder coming out of the ejection port with the shell. H buffer has more "flash" than H3.
Just added a 9mm and CS spring (from G&R this time) to the list.
I'm going to hit the range and start with the 9mm buffer and CS spring unsuppressed with Wolf ammo. I figure that's the most likely to fail. If it runs for 200 I'll add the can and see what happens. If it fails, I'll bump down to the H3, then the H2, etc. I figure the 9mm with CS spring is the most resistance, and the H with stock spring is the least.
It's a Colt, a 6933.
I still think that the heaviest combo that I can get the carbine to run reliably with is the best.
I recon I'll pop the bipod and 10x scope on the thing and work on my long-range trigger work while I try to make it fail.
Make sure to try several different mags. I tried an AAC cyclic rate reducing buffer once, and had problems with it locking back after the last round.
asking for some expert advice here - I'm building up a 10.5" SBR (Noveske barrel) and plan on getting a suppressor down the road (sooner than later, but we know how that usually plays out)
with the SBR should I get an H2, I'm thinking the H3 is a little too heavy? Feel free to correct me?
You'll just have to try it out. I always thought that running the H3 was for KNS pin user types who worry too much, and that it'd just create more issues than it would fix. But I think it has actually tamed my SBR.
I've been running it with both full power military ammo, some factory .223, and some of my pretty mild hand loads. It seems to function fine across the board.... which is the only acceptable way a gun that I own will run.
You'll just have to try the buffers and see how it runs.
I voted H3, but I am getting ready to demo a Slash extra heavy buffer in my suppressed 5.56 SBR, as well as my suppressed 9mm SBR. It weighs in at 6.5oz.
I suspect that my cyclic rate is going to go way down, and I'm hoping to see more consistent extraction.
I will post a review soon.
Granted I only have 300 rds through it so far, but my Colt 6921CQB (10.3" barrel) has an H3 buffer. No issues yet...have shot XM193 and Federal AE223. More after my LT forend gets here on Tue and I can install it.
I have an LMT 10.5 with a Noveske Krink set up on an LMT lower. Standard LMT carbine buffer as far as I know (will check later). I've got about 400 rounds through it without a problem, but it's all slow fire at my local range. Not planning to shot this carbine suppressed.
Question: what function check do you use to test for optimal buffer weight? When will problems show up if the buffer / upper / ammo combo aren't optimal? Fast shooting drills, or ???
I'm attending a three day class next month and I'm thinking about buying an H buffer to have in the spare parts kit for when something goes wrong (just not sure how problems manifest RE: buffer weight).
This might sound dumb but I'm learning :D
What, if any affect do these changes in buffer weight and spring tension have on velocity and or accuracy?:confused:
I read in some magazine that the Colt M4A1 carbine with a 14.5 inches barrel has a H2 buffer?Is this true?The reason for me asking this question is because I have one and a couple of days ago,I just placed an order for an LMT Sopmod buttstock with an H2 buffer.I just hope that it won't cause my Colt M4A1 carbine to mulfunction.
Thanks.