AR15 – Page 2 – Viking Armory

Feed Ramp Polishing

Not all feed ramps need to be polished. If you fire quality ammo with good quality barrel and upper, you might be good. If you reload and like to try different projectiles, cast your own or you are having feed issues, good idea to polish them up.

When I polish feed ramps I do it with the barrel removed from the upper. I am not going to risk screwing something up on the upper. It is more work to remove the barrel but worth the effort for a better finished product.

Here is a before shot:

Feed Ramp after polish and clean up:

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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

AR Magazine Release Tool

I wanted a tool to help get the magazine catch pushed out of my M16/AR-15 without scratching or marring the metal. To compresses the spring and make removal of the magazine catch easier.

Looking around I saw AR Magazine Catch tools similar to mine on various web sites for around $10 without shipping. I am frugal and own a 3D printer, I decided to make one.

I know you can use many other things to push it out, such as, but not limited to, pencil, punch, your kids finger….If you have a 3D printer it is a quick and cheap print.

You can download the STL on Thiniverse

Here are a few pictures:

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Keeping it Tight!

I have been working on a Thread Locking (Loctite) Diagram for AR weapons. This is what I have come up with so far.

Thread Locking Chart

Download it HERE

I am starting to read more about the specs of thread lockers. I am pretty sure the document will change.

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

McMaster-Carr AR parts list and cross reference

Here is a list of McMaster-Carr parts for the AR platform. Enjoy!

Nugget of knowledge I did not know. You can search the mil-spec part number in Mcmaster-Carr. I had never tried before, worked like a champ!

McMaster-Carr-Web

Download the PDF HERE

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

Shooting Bench

Made this shooting Bench a while back. https://howtospecialist.com/workshop/free-shooting-bench-plans/ Came out pretty good!

A little Stain Bleed, but overall not bad.

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

iGauging Plug for Firing Pin Protrusion Measurements

I was watching this video from School of the American Rifle: 5 Colt BCG Physicals (Video link starts at 16:06) and noticed that he had to modify one of the included extension shafts of the iGaging Digital Depth Indicator Set so the firing pin would not go into the threaded hole. That got me thinking about printing something up. This is what I came up with.

iGauging Firing Pin Plug01 — iGauging Firing Pin Plug 01

The threaded plugs on the bottom don’t have the ejector notch the the top two have. I like the notched one better. I don’t have to remove the ejector to use. Both are sized to fit snug in the bolt face without getting stuck by the extractor. The plugs also help hold the bolt in place while testing.

The bottom is very smooth and will be able to help you get accurate and constant readings. AR-15 firing pin protrusion should be 0.028 to 0.036 Check out the reference page for more info.

It is difficult for me to hold everything in place to get an accurate reading. I think I will start working on a holder. More to follow.

You can download the 3D printer files HERE.