10.5" AR Barrel

[Tengoo]

Now I know where I read about the 40% dwell time in that 1" diff.


Why BCM chose the 11.5" SBR over the 10.5"

I get this question a lot. It is a good one. When we spec our program we can build anything we would like, so we sat down and looked at the pros and cons.

I respect the writer's opinion, but all it says to me is that there's no reason a 10.5" barrel shouldn't work quite well. That's good enough for me.

 

[Dietz]

Not all 10.5 barrels are created equal, the vast majority are overgassed (including Daniel Defense's own 10.3") and some are grossly overgassed.

 

[bruin048]

Found a 10.3" at Wolverine.

Rainier Arms 10.5"

 

[Cpt.Flan]

I respect the writer's opinion, but all it says to me is that there's no reason a 10.5" barrel shouldn't work quite well. That's good enough for me.

My 10.5" civy AR works perfectly. Never had any issues. I run it with a FA bolt carrier group and it works even better ( felt recoil, smothness etc... ) .

I understand statistics and physics about the 10.3/10.5" set ups. But think about it... Is anyone in here is pushing is semi-auto AR to that limit of failure? I tried mine on a Full auto C7 lower at work. Other then coming ridiculously hot to the point that gloves where not optional it still worked fine. It worked that day. Would it work all the time. Maybe not. But hey. I had fun and that is all what matters.

I know for a fact that many SOF guys go for the 11.5". Some 10.3-5" . I saw it with my own eyes. I was opfor for them. ( I had that terrible AK looking modified C8 simunition thing ) I asked. They did not have much to say about the subject. Like everyone else reads on the internet. They heard it's more reliable. But never experienced any major issues witj the 10.3-5".

So for the rest of the us I figure it is up to what you like better. The 10.5" I have does snap a little more but I prefer it to the 11.5" Not sure why. It;s just the way it feels in my hands and the balance of it.

Cheers.

 

[Trinimon]

Good to know.

My 10.5" civy AR works perfectly. Never had any issues. I run it with a FA bolt carrier group and it works even better ( felt recoil, smothness etc... ) .

I understand statistics and physics about the 10.3/10.5" set ups. But think about it... Is anyone in here is pushing is semi-auto AR to that limit of failure? I tried mine on a Full auto C7 lower at work. Other then coming ridiculously hot to the point that gloves where not optional it still worked fine. It worked that day. Would it work all the time. Maybe not. But hey. I had fun and that is all what matters.

I know for a fact that many SOF guys go for the 11.5". Some 10.3-5" . I saw it with my own eyes. I was opfor for them. ( I had that terrible AK looking modified C8 simunition thing ) I asked. They did not have much to say about the subject. Like everyone else reads on the internet. They heard it's more reliable. But never experienced any major issues witj the 10.3-5".

So for the rest of the us I figure it is up to what you like better. The 10.5" I have does snap a little more but I prefer it to the 11.5" Not sure why. It;s just the way it feels in my hands and the balance of it.

Cheers.

Humm, would it help to have an adjustable gas block for such an instance?

Not all 10.5 barrels are created equal, the vast majority are overgassed (including Daniel Defense's own 10.3") and some are grossly overgassed.

 

[Dietz]

Humm, would it help to have an adjustable gas block for such an instance?

Yes. But it wouldn't "fix" the problem per se.