Lower Receiver Parts

We stock a wide range of lower receiver parts. From 80% AR15 lowers and magazines to fire control groups and buttsock’s. Our parts come only from the most reputable manufacturers and are always the highest quality and made to exceed mil-spec standards.

What is a lower receiver?

A lower receiver is the part that is actually considered the firearm. Regardless whether it is a stripped lower receiver, that is it only has holes and compartments for all the parts, or a complete lower receiver, with all the necessary parts such as the fire control group (more commonly known as the trigger, disconnector, springs, pins, and hammer), it is the only part that is considered a firearm in the eyes of the law. If you buy an 80% lower receiver, it is not a “True” lower receiver and nothing but a piece of aluminum. You must drill out the pin holes and space to accommodate the fire control group. At this point it will be considered a firearm and subject to all Federal, State, and Local laws, even if you have only partially milled out the fire control group compartment or pin holes.

Once you have your lower receiver you will need to get all the parts that go with it to make it into a complete lower. These include things such as the fire control group and trigger, buffer tube, buffer spring, buffer, grip, stock and magazines. We stock all these and have a wide selection of each.

Quality lower receiver parts

Buffer tubes are a point of consideration. There are two main types: mil-spec and commercial. And there are two variations, Rifle and Carbine length.  The main difference between the main types is the outer diameter of the tube, and the slight slant on the back of the commercial version. The one that matters is the diameter. Mil-spec is 1.148” and commercial is 1.168”. What this means is that depending on the tube you get, you’ll have to get a corresponding stock. If you mismatch them you will run into issues. Mil-spec stocks will fit commercial tubes extremely tightly, if at all, and commercial stocks will be very loose and will rattle on mil-spec tubes. We only carry Mil-Spec version as we see no need and/or benefit to the commercial standard. As for Variations, the difference is length. A Rifle length buffer tube is 10” and the carbine length is 7.25”. These differences then play into which buffer spring and buffer you will need to get. So when choosing these components you need to pay close attention to the version you are getting. If you opt to order these parts from us, you need not worry about this as we verify our orders and only carry stock mil-spec parts and accessories to avoid confusion.

Buffer springs and buffers work in conjunction to make the bolt carrier in the upper receiver cycle. As mentioned above, you’ll need to match your spring and buffer to your buffer tube. Fortunately regardless of the length, buffer springs and tubes are all the same diameter, so you only need to worry about getting the right length spring and the right type of buffer.

Lower receiver parts

All these parts work in conjunction with each other and not one can be overlooked. What you want is parts of consistent quality that will work together in harmony. For example if you opt for a high quality grip, you definitely shouldn’t skimp on a quality trigger.