gas port size info for a MicroMOA Baby Gov

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[ARCHIVED THREAD] - gas port size info for a MicroMOA Baby Gov

Posted: 8/13/2017 8:46:03 PM EDT

put together some parts that had been collecting dust for a while,
12.5 BA govt barrel with one of those MicroMOA gas blocks you could order with any size hole you chose.
this one has whatever smallest hole (i think it was called "drill your own") they offered.
i thought it MIGHT cycle with a can, but Im not surprised that it did not function 20 rds out of 20 rds of guat 556 suppressed.

any advise on what I should drill to? will probably go slow and try a few different sizes, but still looking for info.

thanks

Posted: 8/14/2017 11:17:01 AM EDT

[#1]

I shoot XM193 exclusively, but my 10.5" with a 0.049" Baby Govnah has never had a problem cycling.

Posted: 8/14/2017 1:31:10 PM EDT

[#2]

My 11.5" Ballistic Advantage barrel runs great with a .049 baby govnah

With or without a socom mini

Posted: 8/14/2017 4:20:11 PM EDT

[#3]

Thanks, does anyone remember what size port the "drill it yourself" block came with?

Posted: 8/14/2017 8:17:31 PM EDT

[#4]

Quote History

Quoted:
Thanks, does anyone remember what size port the "drill it yourself" block came with?

View Quote

0.042"

Posted: 8/14/2017 9:20:03 PM EDT

[#5]

Quote History

Quoted:

0.042"

View Quote

thanks
I ordered 0.031 and 0.0469 bits from McMasterCarr right after I posted

Something else I thought of...I just used my 300blk lower that has a H2 in it, wonder how the upper would work with an H or carbine buffer...
what buffers are you guys using?

Posted: 8/14/2017 9:29:52 PM EDT

[#6]

I have a JP-SCS in mine, which I've set up at H2 weight and carbine weight and had no issues either way.

Posted: 8/14/2017 9:37:40 PM EDT

[#7]

regular govnah, 12.5 mid gas I use a .055" with suppressor.

Posted: 8/14/2017 9:41:30 PM EDT

[#8]

Quoted:
I have a JP-SCS in mine, which I've set up at H2 weight and carbine weight and had no issues either way.

oh well, at least I wont be disappointed, still gonna try a few rds tomorrow at lunch

Posted: 8/14/2017 9:43:48 PM EDT

[#9]

Quote History

Quoted:
regular govnah, 12.5 mid gas I use a .055" with suppressor.

View Quote

....I guess I should have added a couple more size bits to the order! Carbine length here.

Posted: 8/15/2017 4:23:14 PM EDT

[#10]

Ok, took a carbine buffer and a box of XM193 and Guat 556.

GUAT was still a no go.
XM193 17 rds perfect with can, removed can and back to single shot mode last 3 rds.

my bits were delivered (ordered at 5:08P yesterday delivered today at 12:58P

), I am going to try the 0.0469 and see what happens.

Posted: 11/9/2017 8:57:01 PM EDT

[#11]

I run a Baby Govnah at .055 on an 11.5 inch cut down LMT. I run an H2 buffer. I went a little over what he recommended (.052) due to wanting 100% functionality with crappy ammunition and I’m using a .30 cal Sandman S with a bit less back pressure. It works like a charm. Very minimal gas coming back, smooth shooting, and reliable. Does not cycle without the suppressor though.

Posted: 11/10/2017 2:05:01 PM EDT

[#12]

Are they ever "re-opening" ???

Posted: 11/10/2017 4:03:13 PM EDT

[#13]

I've been wanting one of these for an 8" 300 blk that I only shoot subs with. I'm going to use another Sentry 7 rather than wait to see if they come back with these.

Posted: 11/10/2017 7:52:48 PM EDT

[#14]

Quote History

Quoted:
Are they ever "re-opening" ???

View Quote

I hope, I would like to get another one. I bought a complete upper from them, love it.

Posted: 11/10/2017 9:59:32 PM EDT

[#15]

Quote History

Quoted:
Are they ever "re-opening" ???

View Quote

I sure hope so! I’d love to see them back in business. I’d especially like to see them back and making the Baby Govnah in .625 size.

Posted: 11/12/2017 10:35:03 PM EDT

[#16]

Quote History

Quoted:
My 11.5" Ballistic Advantage barrel runs great with a .049 baby govnah

With or without a socom mini

View Quote

That doesn't sound right. Isn't the spec closer to 0.070?

I had a 16" carbine bbl with an 0.0625 port cut down to 11.5" some years ago and it def doesn't cycle without a can.

Posted: 11/13/2017 12:50:05 PM EDT

[#17]

Quote History

Quoted:
That doesn't sound right. Isn't the spec closer to 0.070?

I had a 16" carbine bbl with an 0.0625 port cut down to 11.5" some years ago and it def doesn't cycle without a can.

View Quote View All Quotes

View All Quotes

Quote History

Quoted:

Quoted:
My 11.5" Ballistic Advantage barrel runs great with a .049 baby govnah

With or without a socom mini

That doesn't sound right. Isn't the spec closer to 0.070?

I had a 16" carbine bbl with an 0.0625 port cut down to 11.5" some years ago and it def doesn't cycle without a can.

I'm not rocket scientist so I can't begin to explain it but it works great for me.

[ARCHIVED THREAD] - gas port size info for a MicroMOA Baby Gov

Armory » Short Barreled Rifles (SBR)

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