How To Assemble An Ar 15 Bolt Carrier Group

Today, in our continuing DIY AR-15, we’re going to assemble the Bolt Carrier Group, put it on the Upper Receiver, and talk about some different parts and myths to make sure. Make sure your project is complete without a hitch! The Bolt Carrier team is especially important not only to diagnose, but to build properly with good parts from the start. Many malfunctions are directly related to the Bolt Bearing Group, especially the Bolt Bearing Kit Read: how to assemble the Bolt Bearing Group ar 15 A BCG made up of the Bolt Bearer, Bolt (complete), Jack Pin, Cam Pin, Battery Trigger Retains the Battery and we wanted to combine the Charge Grip with this one, although many people don’t.

Bolt . Carrier Group

Contents

While assembling the BCG may seem pretty straightforward, it’s the most important set of parts on the AR-15 and so important that we take the time to talk about some of the key areas that need attention. What we won’t go into here is the difference in parts you can get at home on your AR-15, but what we recommend starting from scratch. with the next installment in the How to Keep Your AR series going. For starters, if you follow our parts list below, you’ll see we’re using ALL Bravo Company USA parts. We feel that Bravo Company offers some of the best parts on the market, especially when it comes to the importance of BCG.

Extractor Spring and Insert

Read more: How to refine edges in photoshop cc 2017 The special key on the BCG is a properly and correctly mounted Carrier Key Extractor Spring with insert. The company covers with their Bolts. Their squeegee springs are made from chrome silicon, heat treated & stress relieved and shot out. Extraction problems and stove piping malfunctions, more often than not, can stem from a faulty spring/insertion combination. If your Extractor Spring is weak, the Extractor will not pick up the used ring and decompress properly, resulting in a jam or not fully ejecting before the bolt returns (stove tube). the importance of High Pressure Test and Magnetic Particle Test in the previous article and it certainly applies here as well. You want to make sure your pin is HP/MP!

Service Provider Key

Properly staked carrier keys are of prime importance for direct conflict AR. When the used gas returns to the Air Key on the Bolt Transporter, it is dependent on proper alignment to complete the duty cycle. A loose transport key can cause a short stroke, or when the latch carrier doesn’t move back far enough that it can be moved forward and released on the next round. If yours doesn’t look like that, we’ll go into detail on how to do this properly in our next How to Keep AR article.

Air ring

Read more: how to get the black finish in ceramic stockFirst of all, let’s dispel the myth that you may have learned in the bootcamp. The gaps in the gas rings do not have to be staggered! It won’t hurt, but isn’t required. You should make sure there are three of them, but we’ve seen guns run with an air ring before. The goal of the air rings is to trap enough air to push the bolt housing backwards. Bryan demonstrates a test on how to tell if you need to replace the air rings in the video below. Place the assembled BCG on the table with the bolt face down. If it stands up under its own weight, the gas rings are fine. If the Bolt Transporter drops below its own weight, it’s time to replace the air washers.

Accessories and Furniture

At this point, you can also equip any accessories and fixtures that you might want to fit on the Top Receiver of your new AR-15. We have used various Magpul features covered in Desert Digital by our friends at CRC Hydrographics. Everything we’ve covered by them, except Back Up Iron Sight, has their new Grip-Tec coating, We look forward to assessing the structural durability even more clearly after we assemble the AR. This is complete and start booking loops through it!

Necessary parts

BCM Bolt Carrier Group (MPI) (Can be purchased in full here)
- HPT / MPI Bolt
- Enable Pins
- Orange Pin
- Enable battery retention pin
- Insert black extractor
- BCM Extractor Spring
- Mil-Spec Crane O-Ring (optional)
BCMGunfighter Charging Handle Mod 4
Magpul XT Rail Panels
Magpul AFG
Magpul MBUS – Rear
Midwest Industries MCTAR-TS

Tools necessary

Assembly instructions

Insert the bolt into the bolt holder with the flare side facing out
Rotate the bolt, align the larger opening with the bolt opening directly below the Carrier Lock
Insert the Cam Pin through the hole of the Bolt Bearer and into the Bolt so that the flat bar on top of the Cam Pin aligns with the Bolt Bearer
Pull the Bolt back to expand it and rotate the Cam Pin 90 degrees.
Release the Trigger Pin (pointed side down) from the opposite end of the Bolt Transporter and press it down to set it in place.
Insert the Trigger Pin Retaining Pin through the larger opening on the same side of the Bolt Supplier that you installed your Cam Pin in.
This completes the assembly of the Bolt Carrier Group.
Insert the Charging Handle into the appropriate cutout in the Upper Receiver
Make sure the Bolt is still stretched in the container and place it in the Charger Handle with the Supplier Key to align.
Press everything home and listen to the click of the seat Charger handle.

Join us back here soon for the next installment in the AR-15 DIY Build (Upper Receiver) where we’ll test headroom and solder BattleComp 1.5 to complete the Upper Receiver! Read more: How to make a ribbon bookmark for the bible