Help building MD compliant upper

DGI · Nov 26, 2017

Put together my ADCOR lower using an Ace skeleton stock (non adjustable) and am intending to build an upper to use as a competition rifle (3gun, etc).

Would like it to be lightweight with a full length handguard. I was planning on running a JP Rifles comp just wondering what options I have for a barrel so its MD Compliant.

I appreciate any help you can offer.

outrider58 · Nov 26, 2017

Must be an Hbar if the lower was purchased after the ban. You can get away with a barrel shorter than 16" by pinning and welding your muzzle brake to make up the difference, but I'm not sure there will be much weight advantage. Also, consider a carbon fiber fore end to help cut some weight.

For those who might ask, "what constitutes an Hbar?", it is any barrel that is marked as Hbar, Heavy Barrel, etc, or one that is advertised by the manufacturer as such.

DGI · Nov 26, 2017

Would a medium weight barrel (like JP's offering) be considered "heavy"?

I remember seeing something about a minimum diameter at the gas block that had to be met but I cannot find that info any more.

outrider58 · Nov 26, 2017

DGI said:
Would a medium weight barrel (like JP's offering) be considered "heavy"?

I remember seeing something about a minimum diameter at the gas block that had to be met but I cannot find that info any more.

Afraid not. Has to say Heavy in some fashion.

DGI · Nov 26, 2017

copy that...

any suggestions on a fluted heavy barrel?

outrider58 · Nov 26, 2017

DGI said:
copy that...

any suggestions on a fluted heavy barrel?

I don't, but there are plenty out there.

Shoobedoo · Nov 26, 2017

outrider58 said:
Must be an Hbar if the lower was purchased after the ban. You can get away with a barrel shorter than 16" by pinning and welding your muzzle brake to make up the difference, but I'm not sure there will be much weight advantage. Also, consider a carbon fiber fore end to help cut some weight.

For those who might ask, "what constitutes an Hbar?", it is any barrel that is marked as Hbar, Heavy Barrel, etc, or one that is advertised by the manufacturer as such.

This ^ ^ ^

If the barrel isn't clearly stamped HBAR I would recommend you retain a copy of the invoice and/or a screenshot of the webpage of the vendor that shows it advertised as HBAR.

DGI · Nov 26, 2017

I just stumbled across this and man am I drooling...

Ballistic Advantage Premium Series 416R SS 223 Wylde 16" SPR Mid
https://www.rainierarms.com/ballistic-advantage-premium-series-416r-ss-223-wylde-16-spr-mid/

I sent an email to my firearms trust lawyer and will get back to everyone with the results as soon as she responds. Shes pretty knowledgeable so i'm confident she'll get me a straight answer

DGI · Nov 26, 2017

Another option as a "heavy" barrel

Match Series- 16" Heavy Fluted, .223 Wylde, Mid-Length, 416R, Nitride, 5R, Nickel Teflon Extension
http://faxonfirearms.com/match-seri...ngth-416r-nitride-5r-nickel-teflon-extension/

outrider58 · Nov 26, 2017

DGI said:
I just stumbled across this and man am I drooling...

Ballistic Advantage Premium Series 416R SS 223 Wylde 16" SPR Mid
https://www.rainierarms.com/ballistic-advantage-premium-series-416r-ss-223-wylde-16-spr-mid/

I sent an email to my firearms trust lawyer and will get back to everyone with the results as soon as she responds. Shes pretty knowledgeable so i'm confident she'll get me a straight answer

Says "Mid" which to me means "not heavy" :shrug:

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outrider58 · Nov 26, 2017

outrider58 said:
Says "Mid" which to me means "not heavy"

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The Faxon looks nice.

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DGI · Nov 26, 2017

Completely missed the "MID" on the first barrel... Faxon looks like its the way to go but I'm waiting to hear back from lawyer before placing the order

protegeV · Nov 26, 2017

outrider58 said:
Says "Mid" which to me means "not heavy"

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I took that as the gas system length, not the barrel weight. :shrug:

outrider58 · Nov 26, 2017

protegeV said:
I took that as the gas system length, not the barrel weight.

You are probably right. Thanks for the correction. Did it say Hbar anywhere in there? I couldn't find anything but I'm sitting in the woods reading my phone without my glasses.

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danb · Nov 26, 2017

DGI said:
I just stumbled across this and man am I drooling...

Ballistic Advantage Premium Series 416R SS 223 Wylde 16" SPR Mid
https://www.rainierarms.com/ballistic-advantage-premium-series-416r-ss-223-wylde-16-spr-mid/

I sent an email to my firearms trust lawyer and will get back to everyone with the results as soon as she responds. Shes pretty knowledgeable so i'm confident she'll get me a straight answer

This says "SPR" profile, not HBAR.

Cannot recall offhand what SPR profile means, but its a no-go.

buellsfurn · Nov 26, 2017

outrider58 said:
You are probably right. Thanks for the correction. Did it say Hbar anywhere in there? I couldn't find anything but I'm sitting in the woods reading my phone without my glasses.

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did you remember the TP

outrider58 · Nov 26, 2017

buellsfurn said:
did you remember the TP

...and crossword puzzle.

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protegeV · Nov 26, 2017

outrider58 said:
You are probably right. Thanks for the correction. Did it say Hbar anywhere in there? I couldn't find anything but I'm sitting in the woods reading my phone without my glasses.

Sent from my XT1585 using Tapatalk

Nah. Just looking at the barrel profile I'd guess it's a no go. Just didn't think mid had anything to do with that aspect though.

campns · Nov 26, 2017

Huh, HBAR is all about barrel diameter... hence HBAR I know someone that built their lightweight rig around this barrel.

https://www.brownells.com/rifle-par...-15-m16-carbon-fiber-16-barrel-prod73555.aspx

DrNRA · Nov 26, 2017

From the few gun shops I’ve visited since moving here, “heavy barrel” seems to be anything that doesn’t have an M203 grenade launcher cutout. I’m basing this off of the walls and walls of Ruger 556 and other standard ARs that are up and on display. I have read the law, and my understanding is that it should be marked HBAR. But in practice it seems to be pretty loosely defined.

Help building MD compliant upper

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