Buffer Weight Question

[VASCAR2]

I watched several youtube videos and read multiple threads on attaching the carrier key to the carrier. I opted not to use any sealant but torqued the screws to spec. So far no gas leakage or problems but I haven’t shot this rifle very much since using the adjustable carrier key. Family obligations has really hindered my shooting time. I was afraid sealant might go where I didn’t want it and if the carrier didn’t work I could redo it.

[montana]

What sealant if any do you have to use on the screws? Gas tube came in today. It is drilled to .625 so it should restrict the gas down to within spec. If this is not what I’m looking for then I am definitely going with the adjustable key. I have read some folks seal them with Indian Head Glue. It is shellac based and handles heat well

Mil spec requires Permatex No.3D Aviation Form-A-Gasket. Some armors prefer using Loctite 620. Be sure not to get any on the mounting screws and to apply a little oil to the fastener screws for proper torque of 58 inch pounds.https://www.youtube.com/watch?v=xKyFt3xQC9E

[Klem]

I have assembled three BCG's in the past.

Used liquid gasket seal on the flat of the key around the gas hole. Then used red Loktite on the screws. Then used the Brownells staking jig. Then filed and sanded the metal displaced by the job.

The Brownells jig is a pretty severe crush compared to other manufacturer stakes, plus the finish comes off around the crush where you have to file it level. It's only cosmetic and you don;t see it when it's in the gun.

Some BCG stakes come in from the top and some from the sides.

You need to stake it because with all the hammering, pressure and heat, the key screws will eventually come lose, even if Loktited.

Some manufacturers don't gasket seal their keys.

I used a tube of cheap automotive silicone instant gasket. Comes out as a black goop and cures in air. Does a similar job in a car engine and works.
.

[Grumpyolman]

Okay, dumb question. How about an adjustable gas block?

[Mad Charlie]

@GrumpyOlMan.
There seems to be issues with the adjusting screws getting seized up with carbon baking on the threads.
Stonehendge can tell you all about that.

[montana]

Adjustable gas blocks are a maintenance item. After use, put a little oil on the adj screw and screw all the way in and out and you will have no problem.