There are several reasons that I can think of where you might find yourself looking for an AR-15 lower parts kit. There are many advantages to purchasing the parts as a complete kit over buying each piece individually. The most obvious ones are the ease of installation and cost. Whether you are building your own rifle, replacing the lower parts kit on your existing rifle due to broken parts or a spring, or simply upgrading for a more custom trigger pull, an AR-15 lower parts kit is the way to go.

WHAT IS AN AR-15 LOWER PARTS KIT?

An AR-15 lower parts kit is simply a sub-assembly of AR-15 Mil-Spec lower assembly parts pre-packaged into a kit that saves the consumer the hassle of buying each part individually. While the purpose of the pre-packaged kit is to ease the process of building the lower receiver part by part, the unexpected consequence resulted in substantial money savings for the consumer. A lower parts kit is the same thing as a lower receiver parts kit. The kits usually contain around around 30 parts that are already assembled upon purchase. The standard definition of a parts kit, and what most of them include, are the trigger spring, trigger pin, hammer spring, hammer pin, disconnector and spring, bolt catch, bolt catch plunger, bolt catch spring, bolt catch roll pin, selector, selector detent, selector detent spring, takedown detents and springs, pivot pin, rear takedown pin, buffer retainer and spring, magazine catch, button and spring, screw and washer, trigger guard assembly, pin, hammer, trigger and pistol grip.

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STRIPPED LOWER RECEIVER

A stripped lower receiver is a lower receiver that has been completely machined and is ready to accept a lower parts kit. Regardless of if you bought the receiver as a stripped receiver or made it yourself from an 80% lower, a stripped lower receiver should function immediately upon the installation of the parts kit and trigger without more modifications or machining required. If you are building your own AR-15, you have three lower receiver options to choose from. An 80% lower, which is not a finished lower receiver, or even a firearm for that matter. An 80% lower will require some machining and milling to make it ready for a lower parts kit. A stripped lower receiver can be purchased as just that, but it IS considered a firearm and will have a stamped serial number. A stripped lower is ready for the lower parts kits as soon as you receive it. A completed lower receiver already has the parts kit included and is immediately ready for the next stage of your AR-15 build.

Anderson AR-15 80% Lower Receiver

WHY CHOOSE A STRIPPED RECEIVER?

  The most obvious benefit of selecting a stripped lower is that you will be able to install your lower parts kit as soon as you receive your stripped lower. There is not any additional finish work to do. The CNC machined lower receiver can immediately accept your choice of a lower parts kit and trigger. And because it is CNC machined, it will provide a precision fit with your parts kit and will have tight tolerances as a finished receiver. Purchasing a stripped lower is a wise option to select if you are a new to moderate AR builder or perhaps an advanced builder who just knows what they like. Purchasing a stripped lower does not take the coveted challenge out of building your very own AR. It is very customizable and still gives you control of your selection for your lower parts kit and trigger. The important thing to remember is that purchasing a stripped lower is purchasing a firearm. Stripped lower receivers are subject to all laws pertaining to an FFL Transfer. The purchase will require the necessary paperwork before the buyer can take possession of their lower receiver. (cc2019).

Anderson AR-15 Stripped Open Lower Receiver

CHOOSING YOUR AR-15 LOWER PARTS KIT

Although most standard lower receiver parts kits contain around 30 parts, all lower kits parts are not the same. If you have your own preference for, say, a specific pistol grip or trigger, you would probably select a lower parts kit that does not have those pre-selected for you. You can get lower parts kits without the trigger, pistol grip or fire control group. Shop All Lower Receiver Parts
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