Left handed upper question

[fledge]

I'm working with a friend to build him a lefty upper.

I've found stripped forged uppers and CMT's billet upper. I've found lefty BCGs. That all seems straightforward.

In some of my research, I hear people saying you need a lefty barrel extension too. Is this still true? Would Ballistic Advantage barrels work as they are? Or do I need to hunt down a barrel company with lefty extensions?

Any advice appreciated as I know some of you have done this.

Thanks.

[GOST]

I don't know what you could do to make an extension for the devil handed, extensions look symmetrical to me. UW or Medic should know.

[SINNER]

You don't need them.

[UWone77]

You don't need them.

Agreed.

I've never even heard of LH barrel extensions.

[Dstrbdmedic167]

What ^^ they said.


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[fledge]

Thanks, guys!!

[apmcdaniel]

Rebuilt this Armalite Rifle for a pal using a Stag LH stripped upper and their LH bolt. Added the Troy FF handguard, etc. The barrel and it's extension are stock Armalite parts. Runs great.

I believe that assigning laterality to a barrel extension is a fairy tail.

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[UWone77]

fledge, have you seen anyone offer LH Barrel extensions? If so, post it up, I'm just curious what the specs/description lists.

[fledge]

Here's one example, UW. See pics down the thread for the supposed difference. This thread is a decade old but I found more discussions like it.

http://www.ar15.com/forums/t_3_4/307446_.html&page=1

[SINNER]

Stag used to list ambi extension on their site and would install it on their barrels. Its no where to be found anymore but I found a place that still lists it.

http://www.cobratactical.com/Stag-Arms-Barrel-Extension-Ambi-AR-15-M16_p_3288.html

[GOST]

I guess they do exist, shows what I know.

[fledge]

I guess they do exist, shows what I know.

Haha I only ran into this issue after I told my friend I could source parts within his budget of better quality than a lefty Stag. I thought I'd have to reconsider that offer. Lefty upper and BCG are already most expensive than their righty counterparts.

Ordered up some parts today and will make budget.

[Sak007]

I run Stag bolts in CMT uppers with barrels from multiple manufacturers and have never had an issue .

[UWone77]

For the most part, I avoided LH uppers until CMT made them. I have 2 CMT uppers both with Ballistic Advantage barrels. So far they've run without issue. Like I said, I didn't even know LH extensions were a thing.

[fledge]

I wish CMT had a lefty BCG to match.

I've got a CMT upper, rail, gas block, a BA barrel, and a chrome line RedX BCG on the way.

[SINNER]

I've had good luck with the Stag BCG's but I agree that CMT needs one.

I have a older Stag lefty rifle with a JP barrel. Pretty sure I have the old Stag barrel somewhere. Need to look at the extension.

I also have CMT uppers with Daniel Defense, Noveske, Rainier and Ballistic Advantage barrels that run flawlessly. I did have an issue with a Stag bolt not headspacing with the DD barrel but another one was well within spec. They swapped it out with no questions asked.

[UWone77]

I spoke to Jeff about this awhile back. At that time, no plans for a CMT LH BCG.

[SINNER]

I think we discussed that at last years show. Along with .308 lefty's.

[cjd3]

fledge, have you seen anyone offer LH Barrel extensions? If so, post it up, I'm just curious what the specs/description

Brownell's used to have the ambi chamfered extension on their site, but they were never were in stock. I've also read torque spectacle anywhere between 100 and 150 ft/lbs. still, I doubt you'll ever realign the extension prooerly with the gas port. I'd assume in barrel building, gas ports are last. When I got my Stag 5 years ago they listed/touted the ambi extension. But I've had no problems with regular barrels on my lefty uppers.