7mm SAUM AR - Page 2

stagpanther · April 1, 2025, 02:03 AM

Quote:

It is actually not too hard to disassemble and reassemble.

Like anything with the right gear it's not hard--just in my old age I have less enthusiasm fiddling with small parts.

tangolima · April 1, 2025, 04:11 AM

I don't have any special tool. Just punch and hammer.

Drive out the 1/16" roll pin. Very important, put the bolt face upside on the bench before pulling out the punch. The bench top captures the extractors and springs, or they will fly out. Reassemble trick is to use the punch as slave pin to guide the roll pin back in.

The rem 700 bolt, oh my goodness. Especially the extractor, I need to gather my best courage to take on that one, even with the special riveting tool.

-TL

Sent from my SM-N960U using Tapatalk

tangolima · April 5, 2025, 07:23 PM

Another funny observation. Now with the improved extraction and ejection, I went ahead to throttle back the gas, trying to further reduce the felt recoil. I found I could more or less shut the adjustable gas block all the way down, and the gun could still cycle ok. To add margin I opened it 1/8 of a turn. I remember when it was new, it required at least 2 full turns. I think the adjustment screw has been eroded down by the the hot gas. Sure I have increased the load by about 2%. Now the mv is approaching 3000fps.

-TL

Sent from my SM-N960U using Tapatalk

stagpanther · April 15, 2025, 08:49 AM

I just got an e-mail from xcaliber announcing their sale; seems they let you know you could be headed for trouble with bigger than usual x308 cartridges.

tangolima · April 15, 2025, 10:05 AM

Yup. I saw that when I bought the barrel. I love tinkering so went ahead. I probably would regret if I didn't. I have learned quite a bit while doing it. The AR platform makes it possible. Of course it would be harder without you guys' help.

I actually check that list every now and then to see whether they have another silly thing I can try.

-TL

Sent from my SM-N960U using Tapatalk

Metal god · April 15, 2025, 11:48 AM

Interesting…. that’s cool that they let you know that there may be issues but at the same time. That could have you looking at the left hand while the right hand is the problem . Which is kind of what happened with you, right . You were having extraction issues and I believe you were working on the gas block and trying to figure out the gas issue and it turned out to be your extractor . Do Did you think them posting that there may be gas issues slow slowed you down to look for other extraction issues ?

tangolima · April 15, 2025, 12:09 PM

I would say yes and no. The statement is their disclaimer that they can't be liable if it doesn't work out. I took the hint and order rifle + 2" gas length to lower the port pressure and dwell time. It might have saved me from some trouble. It is fair to say all the issues I have encountered were not their fault. I would run into those with or without their disclaimer.

-TL

Sent from my SM-N960U using Tapatalk

April 15, 2025, 11:48 AM	#31
Metal god Senior Member Join Date: April 10, 2012 Location: San Diego CA Posts: 7,023	Interesting…. that’s cool that they let you know that there may be issues but at the same time. That could have you looking at the left hand while the right hand is the problem . Which is kind of what happened with you, right . You were having extraction issues and I believe you were working on the gas block and trying to figure out the gas issue and it turned out to be your extractor . Do Did you think them posting that there may be gas issues slow slowed you down to look for other extraction issues ? __________________ If Jesus had a gun , he'd probably still be alive ! I almost always write my posts regardless of content in a jovial manor and intent . If that's not how you took it , please try again .

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April 1, 2025, 04:11 AM	#27
tangolima Senior Member Join Date: September 28, 2013 Posts: 4,927	I don't have any special tool. Just punch and hammer. Drive out the 1/16" roll pin. Very important, put the bolt face upside on the bench before pulling out the punch. The bench top captures the extractors and springs, or they will fly out. Reassemble trick is to use the punch as slave pin to guide the roll pin back in. The rem 700 bolt, oh my goodness. Especially the extractor, I need to gather my best courage to take on that one, even with the special riveting tool. -TL Sent from my SM-N960U using Tapatalk

April 5, 2025, 07:23 PM	#28
tangolima Senior Member Join Date: September 28, 2013 Posts: 4,927	Another funny observation. Now with the improved extraction and ejection, I went ahead to throttle back the gas, trying to further reduce the felt recoil. I found I could more or less shut the adjustable gas block all the way down, and the gun could still cycle ok. To add margin I opened it 1/8 of a turn. I remember when it was new, it required at least 2 full turns. I think the adjustment screw has been eroded down by the the hot gas. Sure I have increased the load by about 2%. Now the mv is approaching 3000fps. -TL Sent from my SM-N960U using Tapatalk

April 15, 2025, 10:05 AM	#30
tangolima Senior Member Join Date: September 28, 2013 Posts: 4,927	Yup. I saw that when I bought the barrel. I love tinkering so went ahead. I probably would regret if I didn't. I have learned quite a bit while doing it. The AR platform makes it possible. Of course it would be harder without you guys' help. I actually check that list every now and then to see whether they have another silly thing I can try. -TL Sent from my SM-N960U using Tapatalk

April 15, 2025, 12:09 PM	#32
tangolima Senior Member Join Date: September 28, 2013 Posts: 4,927	I would say yes and no. The statement is their disclaimer that they can't be liable if it doesn't work out. I took the hint and order rifle + 2" gas length to lower the port pressure and dwell time. It might have saved me from some trouble. It is fair to say all the issues I have encountered were not their fault. I would run into those with or without their disclaimer. -TL Sent from my SM-N960U using Tapatalk