Does anyone know the port hole diameters for their 18" .308 barrels? Im trying to order an adjustable gas block and am overseas so I cant exactly punch the pin and check myself. Thanks
Noveske gas port hole Diameter?
- Thread starter Goose375
- Start date
Re: Noveske gas port hole Diameter?
Goose375-
Thanks for your service.
I just spoke with Joel at Noveske. He doesn't know the port hole diameter, but had a few bits of info:
(1) the diameter of the port hole is standard and will work with any gas block of correct size (on the 18" 308, it takes a 0.875" block, not the 0.75").
(2) he does not recommend any adjustable gas blocks for the 308, at least for battle use - all of them have some reliability fault that could disable the gas system in battle. If you are using in a non-military role, any adjustable 0.875" block should work, although he recommends keeping the adjustment tools on you at the range.
(3) the gas system in their 18" 308 is set up to run with a heavy AR-10 buffer, the H-3.
(4) if you are worried about it being over-gassed due to a suppressor, heavier buffers and/or springs can help.
(5) if you can wait, they are working on the "Switchblock" for 308 (that will be ready in a year or so and you can drop it on the existing barrel no problem).
Hope something above helps you out!
Goose375-
Thanks for your service.
I just spoke with Joel at Noveske. He doesn't know the port hole diameter, but had a few bits of info:
(1) the diameter of the port hole is standard and will work with any gas block of correct size (on the 18" 308, it takes a 0.875" block, not the 0.75").
(2) he does not recommend any adjustable gas blocks for the 308, at least for battle use - all of them have some reliability fault that could disable the gas system in battle. If you are using in a non-military role, any adjustable 0.875" block should work, although he recommends keeping the adjustment tools on you at the range.
(3) the gas system in their 18" 308 is set up to run with a heavy AR-10 buffer, the H-3.
(4) if you are worried about it being over-gassed due to a suppressor, heavier buffers and/or springs can help.
(5) if you can wait, they are working on the "Switchblock" for 308 (that will be ready in a year or so and you can drop it on the existing barrel no problem).
Hope something above helps you out!
Re: Noveske gas port hole Diameter?
Thats great info, thanks alot... I was waiting on a 308 switchblock but didnt think they were on the way., I'll wait for one of those. Im definitely getting over pressure with a can, was looking for a fix. Both H3 buffer and heavy duty Tubb spring are in place.
Thats great info, thanks alot... I was waiting on a 308 switchblock but didnt think they were on the way., I'll wait for one of those. Im definitely getting over pressure with a can, was looking for a fix. Both H3 buffer and heavy duty Tubb spring are in place.
Re: Noveske gas port hole Diameter?
Oh yeah, Joel at Noveske also recommended a website called heavybuffers.com - and here is the AR10 rifle buffer they offer:
http://www.heavybuffers.com/ar10rifle.html
That thing is expensive ($100) but at 10oz is about 2x the weight of a H3. Probably cures your can overpressure, but of course if you take the can off, the rifle probably doesn't cycle.
Joel also said that Vltor is making a heavier buffer in the 7oz range, but it looks like it only is useful if you have a Vltor tube.
Joel said they are invested heavily in the 308 Switchblock and will have it on the market in a year or so.
Oh yeah, Joel at Noveske also recommended a website called heavybuffers.com - and here is the AR10 rifle buffer they offer:
http://www.heavybuffers.com/ar10rifle.html
That thing is expensive ($100) but at 10oz is about 2x the weight of a H3. Probably cures your can overpressure, but of course if you take the can off, the rifle probably doesn't cycle.
Joel also said that Vltor is making a heavier buffer in the 7oz range, but it looks like it only is useful if you have a Vltor tube.
Joel said they are invested heavily in the 308 Switchblock and will have it on the market in a year or so.
Re: Noveske gas port hole Diameter?
Whoa... $125 for a buffer is a pretty penny, AND we aren't sure if that will even save my brass?? I might just wait for the switch block and regulate the gas rather than give the gas more weight to push back.. Great info though, thanks
Whoa... $125 for a buffer is a pretty penny, AND we aren't sure if that will even save my brass?? I might just wait for the switch block and regulate the gas rather than give the gas more weight to push back.. Great info though, thanks
Re: Noveske gas port hole Diameter?
I just punch the roll pin out remove plastic tip then a few inserts and fill with lead shot until I achive desired results.
I just punch the roll pin out remove plastic tip then a few inserts and fill with lead shot until I achive desired results.
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