Yeah there should be a second hole to the right of the 'normal' position. I'd be on the phone tomorrow to Sig.
DMR Gas Block Switch Question
So I have had my DMR a little over a week. I haven't had a chance to bring int to the range yet. I have been getting the scope set up, the case foam cut out, and just taking the rifle apart and learning about how it functions.
So here is my question, I know the switch on the front of the gas block has two settings. One setting for regular use and one setting for if the rifle is extremely dirty and needs more pressure to cycle.
When I took the switch out to inspect it and the piston/tube assembly I noticed there is only a hole in the regular position. I would expect a larger gas hole for the second setting. Look at the picture below and tell me what you think. The only hole on the part is the one you see.
![]()
So here is my question, I know the switch on the front of the gas block has two settings. One setting for regular use and one setting for if the rifle is extremely dirty and needs more pressure to cycle.
When I took the switch out to inspect it and the piston/tube assembly I noticed there is only a hole in the regular position. I would expect a larger gas hole for the second setting. Look at the picture below and tell me what you think. The only hole on the part is the one you see.
1 - 17 of 17 Posts
Just an update. I spoke with Sig support today, they verified that it should have two holes. They are sending me a new one. 
Who did you speak with at SIG? Did you have to send them that photo, or did they just believe you on the spot. I wonder if they have had this problem come up before.95blklsc said:Just an update. I spoke with Sig support today, they verified that it should have two holes. They are sending me a new one.
The replacement just came in. No markings on it at all, and the surface finish is totally different. The one that came with the DMR is a matte gray finish and this is a somewhat polished machined surface. Also, there isn't any lettering embossed in it like the stock DMR one. I wonder what the reason difference is, I don't think it was an oversight.
![]()
2
I just purchased a 556 DMR and had the same single hole position for the gas valve. After reading your post I called customer service and spoke with Victoria who checked with a gunsmith and told me that the DMR has a different configuration from other 556 models and does not need a hole at the second setting of the gas valve.
![]()
![]()
[/img][/url]
[/img][/url]
1 - 17 of 17 Posts
