So I just about finished gathering all the pieces needed to put together a left handed AR. I acquired a left handed black rain ordnance upper, a standard black rain lower, left handed black rain ordnance BCG, etc... The only thing left for me to purchase is a barrel which I wanted to go with a Criterion Hbar barrel. I had ordered one from Optics Planet some time ago which was all rusted, but now I want to order directly from Criterion. Am I correct in assuming a standard barrel will work or do I need a special barrel made for left handed upper? I keep reading conflicting reports about barrel extensions? Any experiences?
Left Handed AR Question again
- Thread starter Cicirich
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- Jul 29, 2014
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I've not heard of left-handed barrels. I think all the easements are made on the bolt lugs. You should be good, but that's an opinion.
You don't need anything but a standard barrel even in a left hand gun. Make the call.
303_enfield
Ultimate Member
If you surf ARFCOM you'll find other things you might want like a left handed .22LR conversion kit.
LEFT-HANDED Stage 22LR Conversion Kit -$90
https://www.ar15.com/forums/equipme...-ADM-/25-2002300/&page=1&anc=5690997#i5690997
Good luck!
LEFT-HANDED Stage 22LR Conversion Kit -$90
https://www.ar15.com/forums/equipme...-ADM-/25-2002300/&page=1&anc=5690997#i5690997
Good luck!
Barrels to be used in left handed AR's should have an ambidextrous barrel extension installed.
There are bevels on barrel extensions so that the bolt head is not grinding on a sharp surface when rotating to lock and unlock.
Right hand extensions only are beveled on one side. Ambi's are beveled on both sides so no matter which way the bolt rotates, it's riding on a beveled surface.
You can probably get away with using a right hand barrel with a lefty hand bolt and just let the bolt head wear the extension in. But, odds are you will wear the bolt out pretty quickly.
Edit : Clandestine explains it better than me in this thread.
https://www.mdshooters.com/showthread.php?t=124479
There are bevels on barrel extensions so that the bolt head is not grinding on a sharp surface when rotating to lock and unlock.
Right hand extensions only are beveled on one side. Ambi's are beveled on both sides so no matter which way the bolt rotates, it's riding on a beveled surface.
You can probably get away with using a right hand barrel with a lefty hand bolt and just let the bolt head wear the extension in. But, odds are you will wear the bolt out pretty quickly.
Edit : Clandestine explains it better than me in this thread.
https://www.mdshooters.com/showthread.php?t=124479
E.Shell
Ultimate Member
This....
ETA: NM - I stand corrected above^^^.
The rifling twist will be designed to keep the barrel tightly threaded into the receiver. The reaction from initiating a right-hand spin tightens the barrel tenon into the receiver, if that too has a right-hand twist, which most do.
The old Brit rifles were made by old Brits...'nuf said. Now, if Paul Mauser had said so...
The horizontal component of the Coriolis effect will vary with firing azimuth and rifling twist (and the resulting spin drift direction) cannot be made to compensate for this.
clandestine
AR-15 Savant
Barrel Extension should be for a LH AR as Inkd said.
Without one the bolt and barrel extension lugs can peen and you can have headspace issues in short order.
Your decision in the end.
Without one the bolt and barrel extension lugs can peen and you can have headspace issues in short order.
Your decision in the end.
Hey Chad. Do you have any recommendations on a Maryland compliant Hbar barrel LH barrel extension??
clandestine
AR-15 Savant
Beyond what stag would sell I'm not aware of anything that will come with a left-hand extensionb and be HBAR. From what I was told stag does not even use left-handed barrels anymore.
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