SBR Buffer w/ CS Spring

[No Bananas]

I've been running an H Buffer & standard Mil-Spec Buffer Soring in my 16" carbine gas system. Works perfect, no problems.

So, my paperwork just went out for my SBR. So, it'll be a little while before I can actually buy the LMT 10.5" upper (gotta wait for paperwork approval, first). In the mean time I can build the lower. I'm really entrigued by the idea of Larue's Chrome Silicon Buffer Spring, because it will last a very long time and I won't have to worry about replacing the buffer spring every 5K rounds.

So, if I wanna run the Chrome Silicon Buffer Spring what buffer should I use? It'll be on a 10.5" upper. Should I get an H Buffer or an H2 buffer?

[Robb Jensen]

A new LMT 10.5" upper will run fine with a CAR buffer.

[tiger seven]

CAR buffer would be my first choice. H at the very most.

Derek

[Iraqgunz]

I may be wrong about this, but I am pretty sure that you can get more than 5K through a standard carbine BS. As long as it falls within the correct parameters 10 1/16- 11 1/4 inches you should be fine.

Originally Posted by No Bananas

I've been running an H Buffer & standard Mil-Spec Buffer Soring in my 16" carbine gas system. Works perfect, no problems.

So, my paperwork just went out for my SBR. So, it'll be a little while before I can actually buy the LMT 10.5" upper (gotta wait for paperwork approval, first). In the mean time I can build the lower. I'm really entrigued by the idea of Larue's Chrome Silicon Buffer Spring, because it will last a very long time and I won't have to worry about replacing the buffer spring every 5K rounds.

So, if I wanna run the Chrome Silicon Buffer Spring what buffer should I use? It'll be on a 10.5" upper. Should I get an H Buffer or an H2 buffer?

[No Bananas]

Wow,
I thought for sure that the standard CAR buffer would still be too light, even with the Chrome Silicon Spring. Those Chrome Silicone Springs must be strong. Most folks I've talked to recomend an H2 buffer if i'm using a standard buffer spring, so I thought that the CS Spring and H buffer would be the best combo......hmmm..

[Robb Jensen]

Originally Posted by No Bananas

Wow,
I thought for sure that the standard CAR buffer would still be too light, even with the Chrome Silicon Spring. Those Chrome Silicone Springs must be strong. Most folks I've talked to recomend an H2 buffer if i'm using a standard buffer spring, so I thought that the CS Spring and H buffer would be the best combo......hmmm..

LMT runs small gas ports.

[No Bananas]

I hate to ask and completely reveal my ignorance. I've learned a lot about ARs since I've been here, but I know I still have a lot ot learn.

My understanding is that with a shorter barrel, the gas port needed to be opened for proper function.

My guess (from what I've learned) is that the carbine length systems have been plagued with too much gas, too fast and that has decreased dwell time an drocketed that BCG faster than it was intended by Papa Stoner.

Now, I'm getting on my thinking hat and grabbing the calculator and cold glass AR Kool-Aid. Therefore, if the LMT 10.5" upper is using a small gas port there will be less gas blasting away at the BCG, and there would be no need for a heavier buffer to decrease dwell time. Am I hitting anywhere close?

Also, I'm sure a properly maintained Mil-Spec will last beyond 5K rounds. BUt I like the CS because it lasts for a min. of 500K compressions. That means I'll (most likely) never need to replace it. I like that . Plus it adds a little more resistance slowing the dwell time.

[mark5pt56]

My opinion is to run the standard spring, buy one extra and more than likely you can't afford to wear out both-if you do you may be buying another barrel at that point.