September 2022 – Viking Armory

AR15 Buffer Spring Measurement Jig

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:

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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

AR15 Gas Block Tool

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!

AR15 Gas Block Tool 03 — AR15 Gas Block Tool group shot

Group shot:

AR15 Gas Block Tool 01 — AR15 Gas Block Tool working

Print your own! Files are on Thingiverse

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More HERE: https://viking-armory.com/?page_id=723

AR-15 Upper Receiver Diagrams – Working Document

I am using this as a working documents to be used as I inspect a rifle.

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More HERE: https://viking-armory.com/?page_id=723

Glock Trigger Jig

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.

A quick jig to hold your Glock Trigger 02 — A quick jig to hold your Glock Trigger without trigger

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.

A quick jig to hold your Glock Trigger 01 — A quick jig to hold your Glock Trigger with trigger

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Or you can print it your self. Files located HERE

More HERE: https://viking-armory.com/?page_id=723

Gas Block Barrel Dimpling

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.

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More HERE: https://viking-armory.com/?page_id=723