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

[Control for Smilers]

Nm. Saw the pin cut in the threads.

 

[cmshoot]

Illegal sbr? Factory made?

It was an illegal SBR, but done by ignorance and not malice aforethought. Whoever cut it measured to the back of the barrel extension, and not to the back of the chamber. Rookie mistake.

Not factory.......at least I don’t think so. Someone cut a 20” rifle barrel down.

 

[cmshoot]

Nm. Saw the pin cut in the threads.

There’s a dimple in the threads, probably for a pin, but it was never pinned.

 

[greg vess]

I carry muzzle break and barrel nut shims in all sizes to avoid crap like that. I am another that has never seen anything like that before. Sometimes it can be a pain to time some but nothing that extreme.

 

[cmshoot]

Nope.......AR’s are not like Legos.

Brand new barrel, not a round fired out of it. Trashed.

 

[November Sierra]

Nope.......AR’s are not like Legos.

Brand new barrel, not a round fired out of it. Trashed.
View attachment 3011343

B-b-but works for me!

 

[300_whisper]

Nope.......AR’s are not like Legos.

Brand new barrel, not a round fired out of it. Trashed.
View attachment 3011343

what happened?

 

[cmshoot]

what happened?

I wasn’t here when someone tried to return it. My guess is installing a barrel nut without using a reaction rod.

 

[Control for Smilers]

I wasn’t here when someone tried to return it. My guess is installing a barrel nut without using a reaction rod.

my reaction rod has been an amazing purchase. even for just muzzle devices it is awesome.

 

[cmshoot]

my reaction rod has been an amazing purchase. even for just muzzle devices it is awesome.

I use a Geissele RR and a Midwest URR. I use the URR for stuff I need to torque on.