If you're looking for a lightweight upper

[Norton]

I have a couple 16" middy guns, they run with anything. But the gas system on the 14.5" middy guns is a lot different then the 16" middy system.

Help a brother out and explain. Is the length of the gas tube different?

I thought that they'd be the same, but what the heck do I know....

 

[Russ D]

Help a brother out and explain. Is the length of the gas tube different?

I thought that they'd be the same, but what the heck do I know....

The dwell time is different because of the distance between the port and the end of the barrel. The best thing to do would be to tune it using different buffer weights.

 

[Norton]

The dwell time is different because of the distance between the port and the end of the barrel. The best thing to do would be to tune it using different buffer weights.

Gotcha.

 

[JeepDriver]

Help a brother out and explain. Is the length of the gas tube different?

I thought that they'd be the same, but what the heck do I know....

They are, its the loss of the 1.5" of barrel that changes things. Just try out some different buffers if there is a problem.

I don't mean to make it sound like it is an unreliable platform, they are very reliable, but it's like owning a performance car, they want 93 gas, not 87. I will own a 14.5" BHF middy in the future.

 

[CrabbyMcNab]

"Out of Stock"

 

[Norton]

They are, its the loss of the 1.5" of barrel that changes things. Just try out some different buffers if there is a problem.

I don't mean to make it sound like it is an unreliable platform, they are very reliable, but it's like owning a performance car, they want 93 gas, not 87. I will own a 14.5" BHF middy in the future.

Gotcha. I'll coming a knocking for advice if it does seem to like what I'm running in it.

 

[Norton]

"Out of Stock"

Told you they'd go fast.....

 

[jimbobborg]

Told you they'd go fast.....

I've actually gotten an email from BCM saying they're in stock and when I click the link, they're already sold out

Jim

 

[Norton]

I've actually gotten an email from BCM saying they're in stock and when I click the link, they're already sold out

Jim

wow.

I jumped on it right away, so I feel fortunate in that case.

 

[ericoak]

I have a couple 16" middy guns, they run with anything. But the gas system on the 14.5" middy guns is a lot different then the 16" middy system.

Oh yea good catch I missed that.

 

[Norton]

BCM rocks like Amadeus.

Three days from order to delivery.

Got so excited, went ahead and ordered handguards and a charging handle for it despite the fact I said I was going to wait.

 

[JeepDriver]

Damn BRD !

 

[Norton]

Damn BRD !

No kidding. Figured I might as well get it done. Still need to add a read sight and then I'll be done. Going to stick the sight taken off of a RRA entry tactical for now.

 

[HardHatMan]

BCM rocks like Amadeus.

Three days from order to delivery.

Got so excited, went ahead and ordered handguards and a charging handle for it despite the fact I said I was going to wait.

Dayum!

 

[HardHatMan]

Could the .223 problem with these uppers be due to a too small gas port in the barrel? Is the 16" port the same size as the 14.5?

 

[Russ D]

Could the .223 problem with these uppers be due to a too small gas port in the barrel? Is the 16" port the same size as the 14.5?

5.56 is very hot compared to factory .223. the 1.5" of barrel length is that much less gas the system is getting to operate. I'm guessing a standard buffer instead of the H would help, but there is no way to find out without trying them all.

 

[Pushrod]

BCM still has the Standard weight 14.5" middies in stock. I just ordered one.

Norton, what bolt carrier group did you get? The BCM BCG has been out of stock for months.

 

[Norton]

Norton, what bolt carrier group did you get? The BCM BCG has been out of stock for months.

I've got a RRA BCG with very few rounds on it sitting here that I'll use for now.

 

[04RWon]

I've got a RRA BCG with very few rounds on it sitting here that I'll use for now.

Use it in what? You talk like you got a new upper...we havent seen any pics of this so called "upper" yet so like the lockness monster and the yetti its only a myth. As an admin you should know better

 

[Norton]

So, once again, BCM came through in quick fashion with the MOE handguards and a Gunfighter charging handle.

I through the RRA BCG in there since I have it sitting around and BCM is slower than molasses getting their BCGs on the market.

Upon putting the bolt back into the carrier after I cleaned it, I had a bit of difficulty getting the bolt all of the way into the carrier right at the point where the gas rings contact the carrier.

Is this a sign that they're worn out? I find it hard to believe given the round count. I got it together, but when I started checking the function of everything, I noticed that if I eased the BCG forward using the charging handle, the carrier doesn't go all of the way forward into battery.

If I let it go with some force (not letting it slam home, though) it seems to work just fine.