Are BCM Lowers Low Shelf?

There has been a lot of talk lately about BCM lowers and whether or not they are low shelf. For those who may not be familiar with the term, low shelf refers to a part of the lower receiver that is not milled out and therefore not visible. This area is typically where the trigger assembly and other fire control components are located.
BCM lowers have been on the market for a while now and have gained a reputation for being high quality. However, there has been some debate as to whether or not their lowers are low shelf.
There are a few things to consider when trying to determine if a BCM lower is low shelf. First, let’s take a look at what low shelf means. As mentioned above, low shelf refers to a part of the lower receiver that is not milled out. This area is typically where the trigger assembly and other fire control components are located.
One of the main reasons that people believe BCM lowers are low shelf is because of the way they are manufactured. BCM uses a process called investment casting to create their lowers. This process involves pouring molten aluminum into a mold. Once the aluminum has cooled and hardened, the mold is removed and the lower is finished.

Investment casting is typically used for high-precision parts that need to be very strong. It is also used for parts that are difficult to machine. The investment casting process creates a very strong and precise lower receiver.
Another reason that people believe BCM lowers are low shelf is because of the company’s history. BCM was founded by a group of former military and law enforcement personnel. These individuals have a lot of experience with firearms and know what it takes to make a high-quality product.
BCM is also a member of the Small Arms and Ammunition Manufacturers Institute (SAMMI). This is a trade association that sets standards for the firearms industry. Members of SAMMI are required to adhere to strict quality control standards.
So, are BCM lowers low shelf? It is difficult to say for sure. However, there are a few things that suggest they may be. First, their lowers are made using the investment casting process. This process creates a very strong and precise lower receiver. Second, BCM is a member of SAMMI. This organization sets strict quality control standards for its members.
If you are looking for a high-quality lower receiver, then BCM may be a good option. Their lowers are made using the investment casting process and are backed by a company with a lot of experience in the firearms industry.
How To Install A BCM Lower
Assuming you have a basic understanding of firearms and lower receivers, installing a BCM lower is actually a pretty simple process and it should take less than an hour to complete. Here’s a step-by-step guide on how to do it:
- First, make sure that the lower receiver is unloaded and no magazine is inserted.
- Next, locate the buffer tube assembly and unscrew the cap at the end of it.
- With the buffer tube assembly removed, you should now be able to see the inside of the lower receiver.
- Take a look at the positioning of the hammer and trigger pins – they should be aligned with the holes in the lower receiver. If they’re not, gently push them into place.
- Now it’s time to install the BCM lower. Start by inserting the rear takedown pin into the hole in the lower receiver.
- With the rear takedown pin in place, you can now fit the BCM lower onto the lower receiver. Make sure that the front and rear take down pins are lined up with the holes in the lower receiver.
- Once the BCM lower is in place, you can now screw on the buffer tube assembly.
- That’s it! You’ve now successfully installed your BCM lower.
Bcm Lower Vs Aero Lower
The BCM Lower Receiver is better for you because it is made from forged aluminum, which is more durable than the Aero Lower Receiver, which is made from polymer. The BCM also has a flared magwell, which makes it easier to insert magazines, and an extended trigger guard, which protects your finger from being pinched when you are firing. The Aero Lower Receiver does not have these features.
The debate over which is better for you, the BCM lower or the Aero lower, has been going on for years. Some people swear by the BCM lower, while others say the Aero lower is the way to go. So, which is the better option?
The BCM lower is made from a high-strength aluminum alloy and is designed to be lightweight and durable. The Aero lower, on the other hand, is made from a polymer and is designed to be more affordable.
So, which is the better option for you? It really depends on what you’re looking for. If you’re looking for a lightweight and durable lower, then the BCM lower is the way to go. If you’re looking for a more affordable lower, then the Aero lower is the better option.