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MadAngler1
10-23-20, 18:54
Has anyone tried a new BCM MK 2 upper running a can? Does it work as advertised? Looking for a new 16” set up to run a Knight’s QDC 556 can. Thanks
ScottsBad
10-23-20, 19:33
Has anyone tried a new BCM MK 2 upper running a can? Does it work as advertised? Looking for a new 16” set up to run a Knight’s QDC 556 can. Thanks

How about cluing some of us in. What does the can have to do with it/what was advertised? Is the gas port supposed to be smaller or something?
MadAngler1
10-23-20, 20:51
How about cluing some of us in. What does the can have to do with it/what was advertised? Is the gas port supposed to be smaller or something?

Has nothing to do with the can. BCM claims this upper receiver (MK 2) mitigates gas blow back to the face. I just want feedback from people who have used it. Also does not necessarily have anything to do with the barrel gas port, just the design of the upper.
Wake27
10-24-20, 09:28
I haven't seen much out there yet surprisingly. I'm also interested to know but there was a lot more chatter prior to their release and not much feedback afterwards.
Mrgunsngear
10-24-20, 09:44
Has anyone tried a new BCM MK 2 upper running a can? Does it work as advertised? Looking for a new 16” set up to run a Knight’s QDC 556 can. Thanks

The MK2 discussion starts around ~10:15


https://youtu.be/pTT0CE1sk9o

If you look at the MK2 vs a standard upper there's no doubt it's milled out differently/deeper for the gas track. I'd say it certainly helps mitigate gas but it's not going to eliminate it completely either FWIW.
MadAngler1
10-24-20, 17:20
The MK2 discussion starts around ~10:15


https://youtu.be/pTT0CE1sk9o

If you look at the MK2 vs a standard upper there's no doubt it's milled out differently/deeper for the gas track. I'd say it certainly helps mitigate gas but it's not going to eliminate it completely either FWIW.

I saw your review. Thanks for the reply. Interesting how the barrel likes 69 gr SMKs.

Sounds like it helps but it is not a cure all
MadAngler1
11-01-20, 21:56
Anybody else have anything to add?
sidewaysil80
10-03-21, 17:12
Bringing this back from the dead as it's relevant to my interests. Has there been any other feedback or musings about gas/blowback mitigation with the MK2 uppers? As someone else mentioned, there was a lot of hype surrounding these but I haven't really heard anything since their release. Curious that they're still making/using standard uppers with all the benefits they touted these as having over them. Was it all marketing hype, or are these a significant enhancement to the platform and undervalued?
opngrnd
10-03-21, 17:57
I should have paid attention a few weeks ago when I had a chance. I'll have another chance sooner than later, and I'll report back then.
Wake27
10-03-21, 18:31
Bringing this back from the dead as it's relevant to my interests. Has there been any other feedback or musings about gas/blowback mitigation with the MK2 uppers? As someone else mentioned, there was a lot of hype surrounding these but I haven't really heard anything since their release. Curious that they're still making/using standard uppers with all the benefits they touted these as having over them. Was it all marketing hype, or are these a significant enhancement to the platform and undervalued?

BCM hasn't had them for quite some time, I've wondered if its because of panic and milspec uppers are cheaper/easier to manufacture or other reasons.
alx01
10-04-21, 12:12
BCM hasn't had them for quite some time, I've wondered if its because of panic and milspec uppers are cheaper/easier to manufacture or other reasons.

I think it's a combination of factors you've mentioned. Plus due to increased thickness of the upper a lot of aftermarket rails with anti-rotation tabs (Geissele, Centurion) wouldn't fit out of the box without filing off some material. Not a big deal if you don't move rails around, but can be put off if you're switching things up.
Stickman
10-06-21, 12:00
Probably more a matter of them selling them all on complete uppers. More money to be made there than as individual pieces.
opngrnd
10-09-21, 21:56
Shot an upper tonight assembled with the Mk2 upper receiver. It was not magically less gassy that other uppers present, and it was definitely gassier that some others. The Mk2 upper wasn't set up to be suppressed fulltime or 50/50, so nothing was apples to apples.
MadAngler1
10-12-21, 19:55
Shot an upper tonight assembled with the Mk2 upper receiver. It was not magically less gassy that other uppers present, and it was definitely gassier that some others. The Mk2 upper wasn't set up to be suppressed fulltime or 50/50, so nothing was apples to apples.

I never bought one yet, but this has been my impression reading reviews across the web. Not a magic bullet so to speak. I’m sure it’s a better design as Bravo Company makes good stuff (I love their stocks), but what really matters is what is going on at the gas block.
opngrnd
10-12-21, 20:03
Completely agree. Everything else seems to be incremental improvements.