A Tale of Two Crush Washers, or Two Crush Washers One Barrel, and other AR oddities

[Asbestos]

LMT 14.3” piston barrel. Customer bought the complete upper used, with a P&W muzzle device already installed. Asked me to remove the muzzle device, and install a new one.

Customer also said the dude he bought the upper from stated it had previously had a different P&W muzzle device on it. So, before my customer got his hands on it, it had at least 2 different P&W muzzle devices installed on it.

I removed the current muzzle device, and found this.

Where the flat is machined into the barrel, the barrel wall thicknesss at the muzzle now measures .0715”.

View attachment 8594346View attachment 8594347View attachment 8594348

Wow

 

[SpeedyR]

oh I'd be pissed all right with the price of an LMT piston barrel. Guess there's a reason to buy a new one from D.Wilson if ever the need arises.

 

[Spas-12 Owner]

LMT 14.3” piston barrel. Customer bought the complete upper used, with a P&W muzzle device already installed. Asked me to remove the muzzle device, and install a new one.

Customer also said the dude he bought the upper from stated it had previously had a different P&W muzzle device on it. So, before my customer got his hands on it, it had at least 2 different P&W muzzle devices installed on it.

I removed the current muzzle device, and found this.

Where the flat is machined into the barrel, the barrel wall thicknesss at the muzzle now measures .0715”.

View attachment 8594346View attachment 8594347View attachment 8594348

Why would anyone do that?

 

[cmshoot]

Why would anyone do that?

I can come up with a few ideas, but none make sense.

 

[BigMike]

Not mine, swiped from a Instagram gun page. Hopefully no one got hurt. Looks bad on toolcraft.

 

[hefcluba]

When you buy a 10 pack of crush washers but forget to add shims.

 

[Asbestos]

When you buy a 10 pack of crush washers but forget to add shims.

Why do you need shims with your crush washers?

 

[Spas-12 Owner]

Why do you need shims with your crush washers?

Why do you need oxygen with your CO²?

 

[Asbestos]

Why do you need oxygen with your CO²?

Great reply. Prrfect

 

[Spas-12 Owner]

Great reply. Prrfect

Prrrfect you say?