Stag10 build short stroking issues resloved !! I needed a Armalite gas tube ??
- Thread starter boss351cleveland
- Start date
I have a Faxon 20" heavy fluted barrel with a ar10 buffer. I can't find out how long the Odin works gas tube is.
Big JD-From the hills
CGN Ultra frequent flyer
- Location
- Saskatchewan.
So im seeing a trend then. Faxon and fulton are most definately needing the longer gas tube. Fingers crossed my ibi is going to work with ar 15 rifle length tubes. Someone in the know is going to have to make a sticky on this once we collect more data. If people that are building/and have parts infront of them could measure the gas port hole to the flange that contacts the upper of the barrel extention we can quickly figgure out what going on.
The problem is gas port distance is not, and is never measured from the barrel extension shoulder to the location of the port. Gas ports are generally dimensioned and controlled from the shoulder on the barrel (where the barrel extension mates) to the shoulder of the the gas block journal (where the gas blocks butts up against). You then have a dimension and tolerance from that shoulder (where the gas block sits) to the theoretical centreline of the gas port hole.
The guys at IBI are intelligent, the likelihood of you having problems with the gas tube and gas port location are fairly low.
I bet a lot of people are not paying attention to the fact that depending on the type of buffer tube used, you can't use a standard AR15 carbine buffer in them - they wont allow the bolt to travel far enough rearward.
I agree with you on this. There are a lot of differences between AR-308 platforms that people just can't wrap their heads around. There are a couple of things that people must get straight from the onset. First, these are not AR-15s. ArmaLite made the first ones, and they got it right, and some of their parts are not interchangeable. DPMS copied ArmaLite because their rifle is a copy, not all parts are interchangeable. ArmaLite is patented and proprietary. Mixing and matching parts unless you do your homework (lots and lots) you are going to run into problems.
I have a Stag that I got from IRG in one of their DIY kits. I haven't had an issue with it at all and it has a AR-15 gas tube. In the OP's case I would suspect it is something else, perhaps something more simpler, like gas block alignment or gas block itself, or as Twan mentioned the wrong buffer.
Just my 2 cents
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Big JD-From the hills
CGN Ultra frequent flyer
- Location
- Saskatchewan.
Well if all the people having short stoke problems... uh lol could take pics of how far the tube is protruding like the original poster.
Yeah I agree there are way to many factors at play but faxon barrels seem to be made to armalite ar 10 specs.
I will be posting my findings on myparts in the next couple weeks.
Yeah I agree there are way to many factors at play but faxon barrels seem to be made to armalite ar 10 specs.
I will be posting my findings on myparts in the next couple weeks.
Took a newly built Stag 10 out today (yup it was in the storm) and noticed week brass extraction to 1 o’clock. Do not like the Stag Handguard so I disassembled the rifle and found this misaligned gas port and block result.
I am going to sell this Handguard and replace it with a Midwest Industry.
I am going to sell this Handguard and replace it with a Midwest Industry.
Your gas block doesn't actually look to bad - at least not insofar from the visible carbon ring. The hole in the gas block that allows the gas to feed into the gas tube is way oversized... IIRC about .125 diameter. There will always be a small amount of mismatch - fore and aft and/or some rotational misalignment if the gas block is not 100% vertically aligned. This is visible even if you remove a pinned A2 front sight post off a mil. barrel.
It does appear that the gas block might have an very small amount of overlap on the radii of the gas port hole, closest to the gas block shoulder, but generally speaking you should still be seeing sufficient gas.
How does the 1 o'clock ejection factor into your thoughts that you're experiencing weak* ejection?
Took a newly built Stag 10 out today (yup it was in the storm) and noticed week brass extraction to 1 o’clock. Do not like the Stag Handguard so I disassembled the rifle and found this misaligned gas port and block result.
It looks as though your gas block was not seated far enough to the rear. Who did your setup on this rifle? Did they measure to see if things line up?
Like I said before, some of these things just don't work with each other. Just get an simple gas block and ditch that over priced POS adjustable gas block. I don't know why people get led down the garden path on these "snake oil" trinket.
Rule of thumb, "make it simple, make it work."
It’s not an adjustable gas block just a clamp on as I am of your mindset regarding trinkets. Adjustable gas blocks are never required. You are correct that it wasn’t far enough back as it should have. This indicates a non mil spec fabrication which is common with AR10 hardware.
boss351cleveland
CGN frequent flyer
- Location
- Down by the river
Yep but how far does the tube protrude into your upper? If it comes to the middle or a bit past of the cam cutout ur fine, depends on who made your barrel.. i do have the proper buffer and gas block . I tried multiple buffers and gas blocks with no luck .. only thing that made the gun run was the longer tube , was night and day .
Big JD-From the hills
CGN Ultra frequent flyer
- Location
- Saskatchewan.
there is a thread a few down where the guy with a mra barrel has the same issue. So it looks like so far, fulton, faxon, and mra are all made to the armalite length spec.
Hope this is of interest.
Image 1: Original BCL102 that used an standard AR15 Rifle length gas tube
Image 2: Replacement Fulton Armory Rifle Length barrel and Armalight Gas tube (no issues)
Image 3: Stag10 Build with BSF Rifle length barrel and AR15 style gas tube (no issues)
Image 1: Original BCL102 that used an standard AR15 Rifle length gas tube
Image 2: Replacement Fulton Armory Rifle Length barrel and Armalight Gas tube (no issues)
Image 3: Stag10 Build with BSF Rifle length barrel and AR15 style gas tube (no issues)
Big JD-From the hills
CGN Ultra frequent flyer
- Location
- Saskatchewan.
Thanks CODfan!!! Thats exactly what this thread needed. now we just need to make your post/pics a sticky, and if people could start measuring bbls then we can get a data bank of what bbl takes what gas tubes.... just in time for all of these to get banned probably but.... meh.
