Superlative Arms Bleed Off Adjustable Gas Block

[jtischauser]

Bleeding off the gas rather then shutting it off seems like it just makes so much sense in an adjustable gas system. What am I missing here?
Anybody tried one of these?

http://suparms.com/products/750-adjustable-low-pro-solid-gas-block-melonite-finish

 

[benny hill]

jesse, if you choke it off, you are using all remaining gas to propell bullet, bleeding it off is robbing the bullet veloicty of gas

 

[Wall]

jesse, if you choke it off, you are using all remaining gas to propell bullet, bleeding it off is robbing the bullet veloicty of gas

This is exactly what I've been saying.

Why is it better to bleed off gas out the front of the block rather than not put it into the block to begin with? Why would I want that hot & dirty gas venting right underneath my hand or forearm?

 

[benny hill]

also if you are venting gas @ 52,000 PSI, I don't want my hand near it.

 

[charger arms]

also if you are venting gas @ 52,000 PSI, I don't want my hand near it.

When I vent gas at that psi, I usually shart.

 

[jtischauser]

Based on what the guys on Facebook are saying you can't even notice the venting and there is no drop in bullet velocity.

 

[benny hill]

facebook enginers. IF the crono says it does'nt lose it I will belive it.

 

[jtischauser]

facebook enginers. IF the crono says it does'nt lose it I will belive it.

I was talkin to Pasameneck. He's one of the few keyboard commandos I trust

 

[Wall]

I was talkin to Pasameneck. He's one of the few keyboard commandos I trust

Wtf? I was posting in that thread too......dick

 

[Burk Cornelius]

Wtf? I was posting in that thread too......dick

Bwahahaha

posted via Tapatalk

 

[jtischauser]

Wtf? I was posting in that thread too......dick

You were negative Nancy in it. I want one so I only want to hear the positives to reaffirm my next purchase. Don't you know how the internet works yet???

 

[Wall]

no need to listen to reason, only self affirmations will do

 

[ExceptionallyAverage]

I installed one last week. Limited testing so far. I never noticed the gas inside bothering my hand. Shooting cheap 55 fmj I could only occasionally break 3000 fps out of an 18 inch barrel with 27.7 g of cfe223.

 

[poopgiggle]

BRB buying a fluid dynamics textbook so I can try to figure out the difference between this gas block and a traditional adjustable gas block from first principles.

 

[Wall]

I made the same case on fb.

 

[poopgiggle]

from their website:

The pressure used in the block is reduced only to the amount required to drive the bolt carrier. The remaining gas / pressure are bled out of the block allowing the system to run much cleaner and cooler.

I don't understand how this system leads to "cleaner and cooler" at all.

 

[Wall]

from their website:


I don't understand how this system leads to "cleaner and cooler" at all.

Pressure inside a traditional adjustable gas block is reduced by never allowing the excess gas in to begin with.

So this block diverts excess gas through an exhaust vent on the block. How is that better than diverting the excess gas through the end of the barrel? With this block you have the full amount of hot gas & contaminants (that can flow through the gas port in the barrel) entering the block & being routed to a vent opening with a metered portion being split off to the gas tube. Traditional adjustable blocks meter that same portion of gas to the gas tube & route the remaining gas down the barrel to vent out of the end without it ever entering the block to begin with.

How can this system run cleaner & cooler than a block that never allows the excess gas in to begin with? Maybe they mean cleaner & cooler than a non-adjustable gas block.

 

[jtischauser]

Pressure inside a traditional adjustable gas block is reduced by never allowing the excess gas in to begin with.

So this block diverts excess gas through an exhaust vent on the block. How is that better than diverting the excess gas through the end of the barrel? With this block you have the full amount of hot gas & contaminants (that can flow through the gas port in the barrel) entering the block & being routed to a vent opening with a metered portion being split off to the gas tube. Traditional adjustable blocks meter that same portion of gas to the gas tube & route the remaining gas down the barrel to vent out of the end without it ever entering the block to begin with.

How can this system run cleaner & cooler than a block that never allows the excess gas in to begin with? Maybe they mean cleaner & cooler than a non-adjustable gas block.

I was assuming it meant less gas and contaminants back to the chamber because the excess is bleeding off through the block rather then back around the empty case once the bolt unlocks???

 

[Wall]

I was assuming it meant less gas and contaminants back to the chamber

Less than what, A fixed gas block? So does a traditional adjustable gas block.

Again, with this block & a traditional adjustable block, you're getting the SAME reduced amount of gas through the tube to the carrier.

 

[Wall]

rather then back around the empty case once the bolt unlocks???

BTW, this isn't how an AR works. It's not a blowback system. The gas travels back to the carrier through the gas tube (bypassing the chamber) forcing it backward causing the bolt to rotate because of the cam. The rotation unlocks the bolt allowing the carrier to continue back to the end of its cycle.