BCM SS410 question

Yoshi · Mar 8, 2015

Are all BCM SS410 barrels HBar?

Wayne1one · Mar 8, 2015

doesn't look like it to me.......

Boom Boom · Mar 8, 2015

BCM SS410 barrels are mid-weight, so a no-go for post-ban.

SWO Daddy · Mar 8, 2015

Boom Boom said:
BCM SS410 barrels are mid-weight, so a no-go for post-ban.

That's not completely true. The 18" and 20” barrels have no taper behind the gas block.

Boom Boom · Mar 8, 2015

Yet BCM still advertises them as mid-weight. There's no getting around the law here. Those barrels are banned on post-ban lowers.

amoebicmagician · Mar 8, 2015

SWO Daddy said:
That's not completely true. The 18" and 20” barrels have no taper behind the gas block.

beat me to it. I didn't know which ones, but I've seen them without the taper

Boom Boom · Mar 8, 2015

Taper doesn't matter in regards to how the law is being applied. The state of MD's official position is deference to the manufacturer regarding barrel weight. BCM labels SS410 barrels as mid-weight. If you put one of those barrels on a post-ban lower, it's a felony in the eyes of MD. It's an indefensible position if you find yourself in court. MD and the local MSM will gleefully make an example out of you. Like it or not, that's reality.

SWO Daddy · Mar 8, 2015

It's advertised as a "Service Match Heavy Contour" in the title of their ad. I see what you're looking at further below, but its obviously not a mid weight barrel. Someone should probably contact BCM to fix that typo.

Yoshi · Mar 9, 2015

HBARs have no taper, correct? Will fluting change its designation?

Boom Boom · Mar 9, 2015

They can have a taper. The smallest diameter shouldn't be less than 0.75", ignoring the front threads.

MKR03 · Mar 9, 2015

Yoshi said:
HBARs have no taper, correct? Will fluting change its designation?

All that matters is that the manufacturer describes it as "HBAR" or "heavy." Dimensions really don't matter. If one company makes a barrel that's .750 throughout and describes it as "heavy," it's GTG. If another company makes a barrel with the exact same dimensions but calls it "SPR profile," it's not. If the barrel comes fluted from the manufacturer and is still described as heavy, it's GTG. If you bought a heavy barrel and had it fluted after the fact, that's a grey area.

Boom Boom · Mar 9, 2015

MKR03 said:
All that matters is that the manufacturer describes it as "HBAR" or "heavy."

That's the hilarious aspect of the issue. Because of MD's official stance on deferring to the manufacturer, any pencil barrel labeled as H-BAR or Heavy is technically good to go.

MKR03 · Mar 9, 2015

Boom Boom said:
That's the hilarious aspect of the issue. Because of MD's official stance on deferring to the manufacturer, any pencil barrel labeled as H-BAR or Heavy is technically good to go.

Yep. MD doesn't really have a stance per se, as the term "heavy" isn't defined in statute or COMAR. Because of that, MSP is deferring to the manufacturer. I'm sure there's no legit company that would call a pencil barrel "heavy," but what about an individual that turns their own barrels?

BCM SS410 question

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