Ok, hope this does not descend into madness...
Built a few ar platform guns, and I have installed a few handguards, various types, that require a propitiatory barrel nut.
Always used the correct tools and a torque wrench, actually bought a click type wrench specifically for the gunsmith tool box.
Back in the distant past, I read up and the "spec" was 30 lb/ft "or more", so I always took that to mean the minimum torque spec was 30 lb/ft. I have not seen a maximum listed, but I have also not looked very hard for that info. It is a steel nut on an aluminum thread, and with enough force it could be damaged.
I have had to shim (between the front of the barrel shoulder and the back of the barrel nut shoulder) to get some of the indexing types (NSR and knock offs) lined up correctly.
I have also disassembled "factory built" uppers that had what I would describe as finger tight barrel nuts. Basically the gas tube was keeping the nut from backing off under use.
Just interested in everyone's thoughts on barrel nut tightness. Feel free to post any legit info or links. Any other info is good too.
Thanks!
Built a few ar platform guns, and I have installed a few handguards, various types, that require a propitiatory barrel nut.
Always used the correct tools and a torque wrench, actually bought a click type wrench specifically for the gunsmith tool box.
Back in the distant past, I read up and the "spec" was 30 lb/ft "or more", so I always took that to mean the minimum torque spec was 30 lb/ft. I have not seen a maximum listed, but I have also not looked very hard for that info. It is a steel nut on an aluminum thread, and with enough force it could be damaged.
I have had to shim (between the front of the barrel shoulder and the back of the barrel nut shoulder) to get some of the indexing types (NSR and knock offs) lined up correctly.
I have also disassembled "factory built" uppers that had what I would describe as finger tight barrel nuts. Basically the gas tube was keeping the nut from backing off under use.
Just interested in everyone's thoughts on barrel nut tightness. Feel free to post any legit info or links. Any other info is good too.
Thanks!