Viking Armory – Veteran Owned and living the Dream
Working Document for the Lower measurements. References Below
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More HERE: https://viking-armory.com/?page_id=723
I think School of the American Rifle started the 2 quarter spacing from the AR15 gas key and the receiver extension. I can not find an exact minimum spacing in the Army TM 9-1005-249-23&P Nov 2008. It makes too much sense for it not to be in there. If someone knows let me know and I will put it in the references.
I never have quarters in my pocket when I am working and if I do I will only have 2, what if I need it to fix a spacing issue? So I came up with this little gem.
It measures 2 quarters / 3.5mm thick and has a few stops to help hold it in place while you are cramming your BCG back trying to get the gauge.
Stops to help hold it:
Opening to let the BCG slide in:
Showing the gap:
Ref:
https://www.usmint.gov/learn/coin-and-medal-programs/coin-specifications
All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
More HERE: https://viking-armory.com/?page_id=723
REF: Army TM 9-1005-319-23&P Nov 2008, Page 0021-10:
Check free length of action spring. RIFLE ONLY: The free length must be between 11 3/4 in. (29.85cm) minimum and 13 1/2 in. (34.29 cm) maximum. CARBINE ONLY: The free length must be between 10 1/16 in. (25.56 cm) minimum and 11 1/4 in. (28.58 cm) maximum. If measurements are notaccurate, replace. Do not attempt to adjust the length by stretching the action spring.
Your manufacture might be different, in making the jig I used the above.
If you have a 3D printer it is a cheap print. This is too long for a standard print bed, I used my Ender Extended 400×400 print surface for this one.
You can download the STL on Thiniverse
To help check the length of your buffer spring I created 2 versions of the AR15 Buffer Spring Measurement Jig; Rifle and Carbine length. The Center is minimum length and the other is maximum length. Your printer might be different so double check measurements after printing.
With Rifle Spring:
All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
More HERE: https://viking-armory.com/?page_id=723
A tool to help hold your gas block while you are trying to drive the gas tube pin in or out. It is plastic, if you beat on too hard or too many times it will break. Not to fear! it is a cheap and relatively fast print.
As an extra bonus, I created a extension tube holder!
Group shot:
Print your own! Files are on Thingiverse
All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
More HERE: https://viking-armory.com/?page_id=723
I am using this as a working documents to be used as I inspect a rifle.
All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
More HERE: https://viking-armory.com/?page_id=723
A quick jig to hold your Glock Trigger for maintenance and / or training. Kinda cool to pull the trigger and see how things work.
Also good if you are doing something like the 25¢ trigger job. See how everything is running before you drop it back in.
I include the white trigger pin file ‘Glock Trigger Jig Pin.stl’. I just use one of the extra pins that come with the back straps for the trigger housing pin. I print it with supports, round part on the bed.
All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
More HERE: https://viking-armory.com/?page_id=723
Dimpling your barrel to help secure your gas block is key to ensuring the gas system of your AR will continue to function correctly. A loose gas block can cause havoc to the cycling of your AR. I dimple at least once directly under the gas port. I can dimple twice, but realize that different manufactures have different spacing for the second screw. If you want or need to change your existing gas block you have to use a gas block with the same set screw spacing. Not a huge issue for some, but if the new gas block you want has a different spacing you would need to get another barrel to accommodate the different spacing.
Using the proper tools I do the dimpling.
I blue it up to match the barrel:
Now ready to get the gas block installed.
All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
More HERE: https://viking-armory.com/?page_id=723
The Glock Ring
This is NOT to check the diameter of your barrel or anything else! Just to check if there is a bulge in your barrel.
Glocks method of checking the barrel is to remove the slide and push it the barrel hole and make sure it does not have a bulge. I wanted something I could use on barrels that are not installed without having to remove a slide.
This example is for 9mm Barrels. I measured several 9mm barrels and slides for Glocks and came up with 0.580 inch for the inner diameter. Because printers vary check before you use.
Just slide it over your barrel and check for a bulge. PLA is softer than the barrel so there should be no marring.
All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
More HERE: https://viking-armory.com/?page_id=723
My Present Arms Gunners Mount Kit is awesome. The one thing I wanted different was the Receiver Alignment Block. It does not seem to fit right on non-mil spec buffer tubes I work on. How can they know all the sizes?
You can see the gap here, it will not seat all the way.
And that is because the buffer tube rail is too wide.
So I do what I do and made one. Seats all the way down
And tightly fits the buffer tube rail
The metal rod it ¼ inch and I cut it down to just below the top.
Then topped it off with a couple of the included caps.
All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
More HERE: https://viking-armory.com/?page_id=723
A sleeve to help hold your castle nut wrench firmly in place while cranking it down on your Present Arms Gunners Mount.
I can not claim this idea as my own, I was watching this video from School of the American Rifle and though “What a great idea”. I did not have any 1 ¼ inch PVC laying around, but I do have a 3D printer and PLA. This is what I came up with for the below wrenches.
Forward Controls:
Magpul:
Wheeler
Family Shot:
Present Arms on all sizes:
All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
More HERE: https://viking-armory.com/?page_id=723
