How to Build an AR15 Lower
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The first step in the building process is to purchase a
stripped lower receiver. The lower receiver is considered a firearm
unlike the rest of the AR15 parts you will need. If you want to know
more about
how to buy a firearm online you can refer to our easy-to-follow guide.
Select a Lower Receiver Group to view images.
LOWER RECEIVER GROUP
Step No. 2 is to buy all the parts you need to assemble
the rifle. Complete rifle kits with a prebuilt upper will include
everything you need to complete a functioning rifle (minus the stripped
lower receiver). You can also buy the parts à la carte if you would like
a more customized rifle.
Select a Upper Receiver Group to view images.
UPPER RECEIVER GROUP
Select a Optional Part to view images.
OPTIONAL PARTS
Upper Receiver Group
Lower Receiver Group
Building the Lower Receiver
When you have all of your parts ready to install on your
stripped lower receiver, make sure you have a clean and clear workspace.
Installing the Lower Receiver
Select Installing Lower Receiver Instruction for:
YouTube Video Instructions
1.) Place tape around the magazine catch slot to protect the finish.
2.) Insert the magazine catch into the slot on the left side of the receiver, and then insert the magazine catch spring over the threaded stud that appears in the hole on the right side of the receiver.
3.) Once you have both those parts in place, you can start by threading the magazine release button two turns onto the threaded stud with the smooth side facing the receiver.
4.) When the button is threaded onto the stud, depress the magazine button with a large punch as far as it will go below the surface of the receiver and tighten the magazine catch until the threaded stud is flush with the button.
5.) Line the magazine catch up with the slot in the receiver and release the pressure on the button.
6.) Insert a magazine, and then depress the magazine release button to make sure your magazine drops free from the magazine well.
1.) Place tape around the magazine catch slot to protect the finish.
2.) Insert the magazine catch into the slot on the left side of the receiver, and then insert the magazine catch spring over the threaded stud that appears in the hole on the right side of the receiver.
3.) Once you have both those parts in place, you can start by threading the magazine release button two turns onto the threaded stud with the smooth side facing the receiver.
4.) When the button is threaded onto the stud, depress the magazine button with a large punch as far as it will go below the surface of the receiver and tighten the magazine catch until the threaded stud is flush with the button.
5.) Line the magazine catch up with the slot in the receiver and release the pressure on the button.
6.) Insert a magazine, and then depress the magazine release button to make sure your magazine drops free from the magazine well.
You have completed
your lower receiver! If you have purchased a preassembled upper receiver
you can now pin that to your lower receiver with the pivot and takedown
pins. Once the upper and lower receiver aremated together you are ready
to go to the range and sight in your new AR15.
AR15 Tools
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