Build Thread Stuck AAC Flash Hider

[Roymil666]

Negative, Rocksett will continue to hold under heat. Hold in boiling water for about five minute then soak it over night to dissolve. Loctite requires heat to remove. Loctite has a greater strength but does not hold up to heat, that is why Rocksett is a better choice for suppressor MD attachment use, it holds up to heat better, but is nowhere near as strong.

I did boil it for 10 minutes. I guess I'll soak it and salvage the FH hopefully. Do you think if I sheared the extension pin that the receiver is still intact?

 

[titsonritz]

I did boil it for 10 minutes. I guess I'll soak it and salvage the FH hopefully. Do you think if I sheared the extension pin that the receiver is still intact?

It has to soak. It is possible, the problem is the pin is steel, the receiver is aluminum. You'll have to remove to find out. Do you have access to a reaction rod? It may help to capture the barrel extension with it. If it is "glued" on like the MD the barrel may need to be cut off.

 

[Roymil666]

No reaction rod. I haven't even tried touching the barrel nut yet so who knows what it looks like underneath.

 

[titsonritz]

They took the term "crush washer" waaaay too literally.

Crush washers should not be used for suppressor attachment, use peel washers or shims.
This what I use...
Accu-Washer Muzzle Device Alignment System | Precision Armament

 

[titsonritz]

From their web site....

Rocksett™

INCREDIBLE TEMPERATURE RESISTANCE (-350°F) up to 2,015°F

BONDS CERAMIC, GLASS, METALS...EVEN KEYLESS SURFACES.

The extreme temperature range makes Rocksett ideal for attaching muzzle devices.

https://cdn.shopify.com/s/files/1/0...60d84db4-0c98-40de-ab14-e4bf5cbd720c.pdf?2026

The only way to break a proper Rocksett bond is to soak the part in hot water for 20 minutes or more and then forcibly remove the components.

 

[Roymil666]

Anyone have the 3 prong removal tool? The two small flats are starting to round off and this thing still won't budge. Boiled and soaked last night/today.

 

[Gonzales]

It sure looked pinned in the one photo provided on the muzzle device. Can you clean it up a bit, and take a few more pictures?

 

[Roymil666]

 

[titsonritz]

Sounds like it is pinned. What is the barrel length? A 14.5" will be pinned, there is no reason to pin a 16". Typically the pin will be on the underside. Are any of those pictures taken from the bottom?

 

[titsonritz]

It is also legal to use high temp silver soldier but I doubt DMPS would use the method.

 

[Roymil666]

16" barrel. Measured from receiver to fh. Those pics are 360 degrees

 

[titsonritz]

It's not pinned. Someone must and wrenched the hell out. Here is what I'd try, put it in the freezer over night, pull it out, vise it up and at a torch the end of the MD tines. Use a small pry bar to engage two of the tines if it is too rounded to grab with a wrench. The idea is the freezer will contract the steel while the heat will expand it.

 

[Roymil666]

It's not pinned. Someone must and wrenched the hell out. Here is what I'd try, put it in the freezer over night, pull it out, vise it up and at a torch the end of the MD tines. Use a small pry bar to engage two of the tines if it is too rounded to grab with a wrench. The idea is the freezer will contract the steel while the heat will expand it.

I'll give it a shot. Thanks a ton. I don't even know if anyone will want it with the rounded off flats though.

 

[Roymil666]

Well it took a 3ft pry bar in between the tines but it's off! Looks like a ton of rock-sett! There was even a layer on the muzzle crown.

 

[cooper]

Pictures

We are still talking about the flash hider right ?

 

[ron]

 

[Swiss_Cheeze]

We are still talking about the flash hider right ?

Well it goes to figure if I ask in the thread that says it in bold letters..... Yes.

 

[Lazyfaire]

In my old life, when someone tightened metal to metal without any kind of washer, etc and then it was heated up it was very heard to separate the two pieces w/out marring or tearing up one or both. Wish you luck

 

[Roymil666]

I was surprised at that myself, no shims or a crush washer or anything between the two. I think the only thing that managed to keep the two from "welding" themselves together was the rock-sett on the mating surfaces.

 

[Lazyfaire]

I was surprised at that myself, no shims or a crush washer or anything between the two. I think the only thing that managed to keep the two from "welding" themselves together was the rock-sett on the mating surfaces.

Does that mean you got it off?