BCG – Viking Armory

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.

AR-15 BCG Test Pin Tray Put Together

Added all the pins in:

AR-15 BCG Test Pin Tray All together

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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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

iGauging Firing Pin Protrusion Gage Holder

After I made the plugs for the iGauge to check firing pin protrusion I realized 2 things.

1. I needed to sand down the plug just a bit so it would fit into the hole to get a negative reading.

2. I still had a hard time holding the bolt in a consistent manner. So I came up with the iGauge Firing Pin Protrusion Tool:

Naked:

iGauging Firing Pin protrusion Gage holder In the begining — iGauging Firing Pin protrusion Gage holder, 1st try

Dressed:

iGauging Firing Pin protrusion Gage holder Full Dressed — iGauging Firing Pin protrusion Gage holder with iGauge, AR15 bolt and firing pin

Then I added spots for boat tail NO-GO and Field Gage:

Naked:

iGauging Firing Pin protrusion Gage holder with no-go holders — iGauging Firing Pin protrusion Gage holder with AR-15 boat tail No-Go and Field gauge holders

Dressed:

iGauging Firing Pin protrusion Gage holder with Friends — iGauging Firing Pin protrusion Gage holder with AR15 bolt, boat tail no-go and field gauges

Stuck 4 non-slip soft rubber feet on it:

iGauging Firing Pin protrusion Gage holder Back

Hit us up with comments or requests

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

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

Hit us up with comments or requests

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

References Drawings BCG

BOLT CARRIER ASSEMBLY0001

AR-15 Gas Key 01 — AR-15 Gas Key Diagram showing markups and dimensions for bolts and all gas sizes

AR-15 Bolt Carrier Group 02 — AR-15 Bolt Carrier Group Diagram showing markups and dimensions for complete bolt length

AR-15 Bolt Carrier Group 01 — AR-15 Bolt Carrier Group Diagram showing markups and dimensions for 2 internal bolt holes, vent hole,

13004787 BOLT ASSEMBLY0001

AR-15 Bolt Diagram 01 — AR-15 Bolt Diagram showing markups and dimensions for Cam Hole, Boat tail Interior, and Bolt Ring

AR-15 Bolt Diagram 02 — AR-15 Bolt Diagram showing Boat Tail, Bolt Face and Firing Pin Hole Dimensions and markups

8448510 BOLT0003

AR-15 Bolt Cam Pin 01 — AR-15 Bolt Cam Pin Diagram showing markups and dimensions for diameter and hole

AR-15 Extractor Diagram — AR-15 Extractor Diagram with Markups

AR15 8448503 PIN, FIRING0001-2048 — 8448503 PIN, FIRING0001-2048

Hit us up with comments or requests

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-15 Bolt Carrier Diagrams – Working Document

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

Bolt Carrier Group Slide Deck

AR15 Gas Key Measurements

Bolt Carrier Group Bolt Test - Slide Deck — Bolt Carrier Group Bolt Test – Slide Deck

Bolt Carrier Group Bolt Diagram 01 - Slide Deck — Bolt Carrier Group Bolt Diagram 01 – Slide Deck

Bolt Carrier Group Bolt Tail Measurements

Bolt Carrier Group Bolt Tail Measurements

Bolt Carrier Group Bolt Diagram 04 - Slide Deck — Bolt Carrier Group Bolt Diagram 04 – Slide Deck

Bolt Measurements Boat Tail and more

AR15 Bolt Shoulder Measurement

AR15 Bolt Face Measurements

AR15 Bolt Parts

AR15 Bolt Ejector Diagram

AR15 Extractor Measurements

AR15 Firing Pin

Firing Pin Depth Test

Hit us up with comments or requests

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

On Line References AR Platform

REF:

Videos:

School of the American Rifle / Instructor Chad

BCG Specs & Holes by KB32 Tactical

Diagrams:

TM 9-1005-249-23&P

M16 BCG Drawing Set.pdf

Forums and Discussions:

Forum at AR15.com

SOTAR Facebook Public Page/Site

Hit us up with comments or requests

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

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