If a gas block is leaking gas, will it eventually seal it self from the carbon?
I have a 11.5 with lo pro and my hand is right over the gas block on the rail. After a 15 rd string of fire, the heat/gases from the gas block is too hot to hold. This only happens with high rd count strings. I’m not sure if its leaking from the gas block or gas tube connection.
I have 1000 rds though the gun and it has been 100%
Gas block is syrac ord.
Gas blocks get hot. Wear gloves.
Doesn’t get that hot after only 15 rds and when under a rail.
If it’s leaking, why not fix it or get it fixed?
When you installed it onto the barrel was it loose or did it take effort to put it on?
It slide on pretty easily.
Because I want to know if its an issue and if it will seal it self.
Aluminum or steel gb?
I’ve had aluminum gb’s erode over time… sometimes, depending on ammo type it happens pretty fast.
One of the reasons I’ve gone exclusively to SS and CS gb’s for my builds.
This is part of the reason for taper pins on the real FSB. As they’re pushed into place, they PULL the FSB onto the port and help seal the system.
It sounds like you have more than just a small gas leak that will seal itself. 1000 rounds is plenty of carbon to plug a small hole. Get a FSB and chop it down.
This is a Syrac Ord Adjustable Gas Block.
IMO that is your problem. The gas block should be tight fitting on the barrel.
So I’m assuming the FN/ST barrel or SYRAC is out of spec
I am thinking the gas block. The easy way to find out is to get another low pro block or FSB and slide into place and see how it goes.
Is it a major issue?
The rifle has run 100% for 1K rounds… so it spits a little excess gas.
I will assume the Syrac GB has a set screw, is it still tight? I have yet to see an AR that doesn’t leak a small amount around the gas tube or from under an aftermarket block. The truly important issue here is whether or not the rifle is reliable, as to heat… even I am considering a pair of gloves for my 11.5" the AAC SPR M4 gets hot too!
I dearly wish Syrac made a clamp on style GB, my next 11.5 will be Noveske and the switchblock/pinned.
Good shooting
D
They do make a clamp one 
Other than the heat, what symptoms of leakage are you having? The gas block will get hot without gas leakage
Its not the gas block that’s “burning” me. Its the escaping gas.
Putting some clear nail polish around the gas block will help it seal faster, and the polish will just burn itself off.
If that doesn’t work then replace the gas block as discussed above.