AR-15 AR15 AR 15 – Viking Armory

Compensator Install

A compensator is a muzzle device designed to reduce muzzle rise. A compensator will “compensate” for a firearm muzzle’s rise after you fire a shot, this directly affects follow-up shots because they help you recover your sight picture by shooting flatter.

There are many articles about what is best out there. We leave that up to you.

You want to make sure your compensator is timed correctly. Timing is simply insuring that the ports are properly positioned. With the proper tools and hardware provided with your device I can get you timed and aligned correctly.

Here are a couple Shots of what I do:

AR compensator Service 1 — AR compensator Service

AR compensator Service 2 — AR compensator Service

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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.

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AR-15 Bolt Carrier Group (BCG) Test Pin Tray

I started working on a holder for the AR15 Bolt Carrier Group (BCG) Pins. The idea came from School of the American Rifle. I wanted to be able to remove the pins if needed. I also did not want to paint my pins for GO / Warn / NO-GO. Here is what I came up with.

Got everything printed up in the right colors and numbers. You can switch it up how ever you like:

AR-15 BCG Test Pin Tray What you print — Everything printed up in the right colors

Then I put it all together. I had to cleanup everything with sandpaper, file and an Exacto knife. With a little help from a small nylon hammer. I got everything in place. Even tried a little infill using model paint.

Added all the pins in:

So far it is working out pretty good. It is another tool in the toolbox when troubleshooting AR15 Bolt Carrier Groups (BCG) The pin sizes are born out of the data I pulled from my research HERE.

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AR-15 Lower Receiver Diagrams – Working Document

Working Document for the Lower measurements. References Below

Receiver Extension Drawing with pin gauging

AR15 Receiver Extension Technical Diagram

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BCG to Buffer Space Gauge aka 2 Quarter Tool

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.

BCG to Buffer Space Gauge aka 2 Quarter Tool with quarters

Stops to help hold it:

Opening to let the BCG slide in:

Showing the gap:

BCG to Buffer Space Gauge aka 2 Quarter Tool in use

Ref:

https://www.usmint.gov/learn/coin-and-medal-programs/coin-specifications

Posted on Thiniverse

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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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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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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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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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Present Arms Custom Receiver Alignment Block

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.

Present Arms Receiver Alignment Block Original Bottom — You can see the gap here, it will not seat all the way.

And that is because the buffer tube rail is too wide.

Present Arms Receiver Alignment Block Original Top — 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.

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Present Arms Sleeve

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:

Present Arms Buffer Tube Sleeve 05 — A sleeve to help hold your castle nut wrench firmly in place Forward Controls

Present Arms Buffer Tube Sleeve 02 — A sleeve to help hold your castle nut wrench firmly in place Forward Controls

Magpul:

Present Arms Buffer Tube Sleeve 03 — A sleeve to help hold your castle nut wrench firmly in place Magpul

Present Arms Buffer Tube Sleeve 06 — A sleeve to help hold your castle nut wrench firmly in place Magpul

Wheeler

Present Arms Buffer Tube Sleeve 04 — A sleeve to help hold your castle nut wrench firmly in place Wheeler

Family Shot:

Present Arms Buffer Tube Sleeve 07 — A sleeve to help hold your castle nut wrench firmly in place all 3

Present Arms on all sizes:

Present Arms Buffer Tube Sleeve 08 — A sleeve to help hold your castle nut wrench firmly in place Present Arms

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