Does using a H-buffer help the reliability in a Carbine Ar, what the difference?

[J_Rock]

I have an LMT AND NOVESKE, so i should be fine with the standard buffers I am assuming. I dont care if my brass is getting damaged and i dont have full auto, I just want it reliable. I would think if your brass if being spit out far, then thats better right? Wouldnt that mean its cycling good?

Actually that could be a bad thing meaning your gun is over gassed. Your BCG is being pushed harder and faster meaning more wear and tear on the parts. Your gun is unlocking too fast meaning your brass doesnt have time to 'shrink' in the chamber resulting harder extraction and extra gases blowing backing back into your receiver

Unless you are a 3 gun shooter the rule of thumb is to use the heaviest buffer your gun will run reliably with your weakest ammo.

[aplinker]

I have an LMT AND NOVESKE, so i should be fine with the standard buffers I am assuming. I dont care if my brass is getting damaged and i dont have full auto, I just want it reliable. I would think if your brass if being spit out far, then thats better right? Wouldnt that mean its cycling good?

Both LMT and Noveske ship their guns with H-buffers.

Use the heaviest buffer your gun will cycle.

[bluthandwerk]

Thanks for all the tips! I'll stick with the H2, since I've never had any FTE or FTF issues in the several hundred rounds I've fired.

[supermario]

Actually that could be a bad thing meaning your gun is over gassed. Your BCG is being pushed harder and faster meaning more wear and tear on the parts. Your gun is unlocking too fast meaning your brass doesnt have time to 'shrink' in the chamber resulting harder extraction and extra gases blowing backing back into your receiver

Unless you are a 3 gun shooter the rule of thumb is to use the heaviest buffer your gun will run reliably with your weakest ammo.

My Ar's are new so i really dont know how far they spit out the cases, but i will know this weekend hopefully.
One time i shot my AK and it shot the case soo far in the air with soo much force that the case stuck into the wooden canopy over hour heads.. I love that

[Addax]

This is because piston guns unlock so fiercely.
The length of the gas tube on a direct impingement gun allows the pressure to drop before it pressurizes the bolt carrier.
This both softens the carrier movement and delays the unlocking long enough for the bullet to clear the barrel and the pressure to subside within the cartridge case.
Gas piston's don't have that delay as the piston head is very very close to the gas port.
Therefore, gas piston guns have the same "early extraction" problem where the bullet is still in the barrel and pressure is holding (expanding) the case while the bolt is trying to extract the case.
Delaying the unlocking is the main reason that piston guns need really heavy buffers.

I am able to run my Combat Carbine GPU's using a Standard Buffer and Buffer Spring.

Some of the more inefficient or poorly designed piston systems just have a simple gas block that just ports the gas directly from the barrel to the piston head, and therefore perform just like you said.

Not all piston system designs are the same.

There are several piston system designs like the one we use on our GPU's that does not port the gas directly to the piston.

[tools2teach]

I had to buy some small replacement parts for my mid length gas system AR. I noticed that Wolf makes a extra power buffer spring. How would this impact the AR if I had a standard H buffer. Would it be recommended to get a heavier buffer?

[NiteQwill]

I had to buy some small replacement parts for my mid length gas system AR. I noticed that Wolf makes a extra power buffer spring. How would this impact the AR if I had a standard H buffer. Would it be recommended to get a heavier buffer?

See above link. That's the correct answer.

old thread...

[Bentot]

Are gas ports the same size on say 16" carbine length among popular brands?

[tools2teach]

Yes it is....It's a Noveske N4 with a mid length gas system. 16" carbine length.

[818gtiguy]

Are gas ports the same size on say 16" carbine length among popular brands?

No, different manufactures use different size ports. I have seen BCM, CMMG, and Stag 16'' barrels, carbines length gas system and ALL OF THEM had different size gas ports ,compared to each other.

Here is some more info on buffers..The author who wrote this is a REAL TEIR ONE OPERATOR, not some mall ninja.... http://www.defensereview.com/the-big...m4-unreliable/

[ar15barrels]

Are gas ports the same size on say 16" carbine length among popular brands?

Absolutely not.
Port diameters are all over the map.
I have personally measured and recorded 100's of gas port diameters.

[Cobrafreak]

I am running the 9mm buffer on my AR carbine, which is the heaviest. Gun is cleaner, cooler, shells eject pleasantly, helps with feeding and and wear. I really like mine.