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Lower Part Kits

What Is a Lower Parts Kit?
Unlike many types of firearms which have a single frame or receiver that joins all of the working parts, many sporting rifles (like AR-15s and other AR-style rifles) have both upper and lower receivers. The lower receiver is the part that is regulated by the ATF and thus considered a “gun.” To complete a rifle build at home, you will need a variety of tools, as well as a lower receiver blank (also called an 80% lower), and a lower parts kit.

The lower parts kit often contains all of the hardware and components you will need to complete a finished lower (minus the lower receiver itself). Exactly what the kit contains will vary, but many of our lower parts kits contain:

● Fire selector lever
● Bolt catch assembly with hardware
● Buffer tube detents and springs
● Takedown pivot pin detents and springs
● Takedown pins
● Safety spring and detent pins
● Trigger & hammer pins
● Trigger guard assembly
● Pivot pin
● Mag catch

Please note - laws vary according to state and jurisdiction. Please consult a lawyer before beginning your home build in order to ensure you are in full compliance with all applicable legislation.

What Else Do I Need?
What else you will need will vary in accordance with the content of the kit. However, generally, In addition to a lower parts kit, you will also need a lower receiver, a grip, a trigger assembly, a buffer tube kit, and stock, and an upper receiver or a complete, assembled upper, which will contain a barrel, upper receiver, BCG, CH, gas system, forward assist, ejection port cover, and handguard. You may also be able to buy an all-in-one kit called a build kit (which may even come with a stripped lower).

Questions? We Can Help!
Not sure how to proceed with your project? Contact us at 239-848-6757. We’ll help you get all the parts and tools you need.

  • SALE
    XTS AR-15 ANODIZED PARTS KIT XTS AR-15 ANODIZED PARTS KIT

    AR-15 ANODIZED PARTS KIT

    All XTS Anodized Small Parts in One Convenient Package. Includes: Buffer Tube Charging Handle Forward Assist Ejection Port Cover Trigger Guard Ambidextrous Safety Selector Switch Magazine Catch Assembly Allen Keys for Installation

    MSRP: $105.99
    Was: $99.99
    Now: $89.99
    Choose Options
  • SALE
    MCS Lower Parts Kit w/ Standard Grip & Trigger Guard - LPK

    Lower Parts Kit w/ Standard Grip & Trigger Guard - LPK

    Our AR-15 Lower Receiver Parts Kits (LPK's) include everything you'll need to put together a well-functioning and sleek Lower. The solid steel Trigger and Hammer are made in the U.S.A. and each of the pieces are also available separately. The standard...

    MSRP: $69.99
    Was: $59.99
    Now: $45.99
    Add to Cart
  • SALE
    JE Machine tech Lower Parts Kit Fits GLOCK 26 Gen 3

    Lower Parts Kit Fits GLOCK 26 Gen 3

    GLOCK 26 Kit Includes: Connector Slide Stop Release with Spring Locking Block Pin Magazine Release  Magazine Release Spring Slide Lock Slide Lock Spring Trigger Housing Pin Trigger Housing with Ejector  Trigger Pin Trigger Spring Trigger with...

    MSRP: $75.99
    Was: $65.99
    Now: $50.99
    Add to Cart
  • SALE
    MCS Glock RMR Build Kit 17/19/22/26 MCS Glock RMR Build Kit 17/19/22/26

    Glock RMR Build Kit 17/19/22/26

    New MCS competition RMR glock build kit. With this upgraded build kit, you will be able to have almost all of the necessary components to build your very own RMR ready competition glock pistol. Available for G17/19/22/26 Glock Slide RMR Ready Gen 3...

    MSRP: $400.99
    Was: $375.99
    Now: $354.99
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  • SALE
    JE Machine tech Lower Parts Kit Fits GLOCK 17 Gen 1-3

    Lower Parts Kit Fits GLOCK 17 Gen 1-3

    Compatible w/ full sized polymer 80% frames (PF940v2) & Glock 17Connector 5lb. Slide Stop Release with Spring Locking Block Pin Magazine Release Magazine Release Spring Slide Lock Slide Lock Spring Trigger Housing Pin Trigger Housing with 336...

    MSRP: $89.99
    Was: $79.99
    Now: $50.99
    Add to Cart
  • MCS AR-15 Lower Parts Kit No FC - Anodized Colors MCS AR-15 Lower Parts Kit No FC - Anodized Colors

    AR-15 Lower Parts Kit No FC - Anodized Colors

    AR-15 Lower Parts Kit with out Trigger, Hammer and Grip - Anodized Colors This 31pc Lower Parts Kit Includes: Standard or colored Safety Selector Safety Detent Safety Detent Spring Standard or colored Trigger Guard Trigger Guard Roll Pin Pistol Grip...

    MSRP: $59.99 - $84.99
    $39.99 - $69.99
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  • MCS AR-15 Lower Parts Kit w/ Cerakote RED

    AR-15 Lower Parts Kit w/ Cerakote RED

    CERAKOTE RED Pistol Grip Option AR-15 Pistol Grip AR-15 Polymer Pistol Grip CERAKOTE RED SAFETY SELECTOR AR Ambidextrous Safety Selector V.2 CERAKOTE RED TRIGGER CERAKOTE RED Takedown Pin-Long Cerakote RED Pivot...

    MSRP: $99.99
    $74.99
    Add to Cart