Are BCM lowers low shelf? This is a common question we get asked, and the answer is NO. The BCM Lower Receiver is not a “low shelf” lower receiver. The “low shelf” feature is only found on lower receivers that are intended to be used with full auto fire control groups.
The BCM Lower Receiver is a high quality, Mil-Spec lower receiver that is perfect for your next custom AR-15 build. The lower receiver is machined from a 7075-T6 aluminum forging and features a Mil-Spec Type III hard coat anodized finish. The lower receiver also features a flared magazine well for easy magazine changes and an integrated trigger guard for added strength and durability.
Advance Tips: Are Bcm Lowers Low Shelf

The short answer is yes, BCM lowers are low shelf. They are not, however, mil-spec lowers. In order to be mil-spec, a lower must have a rear takedown lug and a front pivot lug. These lugs are not present on BCM lowers. As a result, many people consider BCM lowers to be “non-standard” or “out of spec.” While this may be true, it does not mean that BCM lowers are of inferior quality. In fact, many people believe that BCM lowers are actually superior to mil-spec lowers. This is because BCM lowers are made from a higher quality aluminum and they have a more robust construction. as a result, BCM lowers are often considered to be the best choice for those who are looking for a high-quality, durable lower receiver.
BCM lowers are also available in a variety of different colors. This gives you the ability to customize the look of your rifle. You can also find BCM lowers that have been anodized. Anodizing is a process that adds a protective coating to the aluminum. This coating helps to prevent the aluminum from corrosion. Anodizing also gives the aluminum a unique color. As a result, anodized BCM lowers can be found in a variety of different colors, including black, green, red, and blue.
If you are looking for a high-quality, durable lower receiver, then BCM is a great choice. However, keep in mind that BCM lowers are not mil-spec. This means that they will not fit all AR-15 upper receivers. You will need to check to make sure that the BCM lower that you select is compatible with the upper receiver that you have.
Which Is Better For You, The Bcm Lower Or The Aero Lower?
When it comes to choosing a lower for your AR-15, there are many factors to consider. Two of the most popular lowers on the market are the BCM Lower and the Aero Lower. So, which is the better choice for you?
The BCM Lower is made from a high-quality aluminum alloy that is precision machined to mil-spec dimensions. It features a Mil-Spec Type III hard coat anodized finish that is extremely durable. The BCM Lower also features an integrated trigger guard, flared magwell, and a machined “tear drop” forward assist.
The Aero Lower is also made from a high-quality aluminum alloy and is precision machined to mil-spec dimensions. It also features a Mil-Spec Type III hard coat anodized finish. The Aero Lower also has an integrated trigger guard and a flared magwell. However, it does not have a forward assist.
So, which is the better choice for you? If you are looking for a lower that has all the bells and whistles, then the BCM Lower is the way to go. However, if you are looking for a lower that is a little simpler and more affordable, then the Aero Lower is the better choice for you.
The BCM Lower Shelf: Pros and Cons.
There are a few advantages and disadvantages to the BCM Lower Shelf. Based on my research, the advantages seem to outweigh the disadvantages, but it ultimately depends on your needs and preferences.
The biggest advantage of the BCM Lower Shelf is the increased stability it provides. This is due to the fact that the shelf is lower to the ground, which makes it less likely to tip over. Additionally, the shelf is also wider than most shelves, which provides additional support.
Another advantage of the BCM Lower Shelf is the increased storage space it provides. This is due to the fact that the shelf is designed to hold more weight than other shelves. Additionally, the shelf is also deeper than most shelves, which allows you to store more items on it.
The only real disadvantage of the BCM Lower Shelf is the fact that it is more expensive than other shelves. However, the increased stability and storage space it provides may be worth the extra cost for some people.
How to Install a BCM Lower.

There is no definitive answer to this question as the BCM lowers can be either low shelf or high shelf. It really depends on the specific model and manufacturer of the lower. However, in general, it is not too difficult to install a BCM lower.
- First, you will need to remove the old lower from the rifle. This is typically done by removing the two pins that hold the lower in place.
- Next, you will need to take the new BCM lower and line it up with the holes on the receiver.
- Once the lower is lined up, you can reinstall the two pins that hold it in place.
- Finally, you will need to install the magazine release and the bolt catch. These are typically easy to install and simply require you to line up the holes and screw them in place.
How to Use a BCM Lower.
There are a few things to consider when using a BCM lower based on the shelf. The first is that you need to make sure the lower is properly staked and that the gas key is properly installed. The second is to ensure that the buffer tube is properly installed and that the spring is seated correctly. Finally, you need to make sure that the buttstock is properly installed and that the castle nut is tight.
The Bottom Line on BCM Lowers.
There is no definitive answer to this question as it depends on a number of factors, including the specific BCM lower in question and the intended use for the lower. Some users may consider a BCM lower to be low shelf due to its relatively affordable price point, while others may find that the quality and features of the lower make it a good value for the price. Ultimately, it is up to the individual user to decide whether or not a BCM lower is low shelf.
Frequently Asked Questions [FAQs]
A BCM lower is a lower receiver made by Bravo Company Manufacturing.
A low shelf BCM lower is a lower receiver that has a shelf cut into it to allow for the installation of a drop-in auto sear.
A low shelf BCM lower differs from a standard BCM lower in that it has a shelf cut into it to allow for the installation of a drop-in auto sear. This shelf is located below the rear takedown pin lug.
You might want a low shelf BCM lower if you are looking to convert your AR-15 into a fully automatic rifle.
You can find a low shelf BCM lower for sale at most gun stores or online retailers that sell firearms.
Conclusion
There is no definitive answer to this question as there are many factors that can affect the answer. Some people may say that BCM lowers are low shelf because they are less expensive than other brands. Others may say that BCM lowers are not low shelf because they are made from high-quality materials and have a reputation for being durable. Ultimately, it is up to the individual to decide whether or not BCM lowers are low shelf.

A. Wilcox Head is a lifelong shooter, hunter, and firearms enthusiast. Head grew up in a family where firearms were a way of life, and from an early age, he was taught the importance of firearm safety, accuracy, and proper hunting techniques.