AR-15 Lower Parts

AR-15 Lower Parts

At A1Armory.com, our selection of AR-15 Lower Parts encompasses an extensive range of components meticulously crafted to elevate your firearm's performance and durability. Designed with precision engineering and manufactured to exacting standards, our lower parts are the cornerstone of any AR-15 build, ensuring reliability and optimal functionality. From trigger assemblies to buffer tubes, each part is carefully selected to guarantee compatibility and seamless integration, whether you're assembling a new rifle or upgrading an existing platform.

  • A1A AR-15 Receiver Extension End Plate

    Bulk Wholesale AR-15 Mil-Spec End Plates

    $2.39
    Bulk Wholesale AR Platform Buffer Tube Receiver End Plates       MINIMUM OF 100 MUST BE PURCHASED Description: Upgrade your AR15, M16, or AR10 with our Mil-Spec AR .223/5.56/.308 Buffer Tube Receiver End Plate, designed to...
    $2.39
  • 10 AR10  AR15 Pivot & Takedown Pin Springs in bulk

    10 AR10 / AR15 Pivot & Takedown Pin Springs

    MSRP: $15.99
    $8.09
    10- Pack Pivot & Takedown Pin Springs         10-Pack Pivot & Takedown Pin Springs✅ Precision-Crafted | ✅ 100% USA Made | ✅ Milspec Quality Ensure smooth operation and reliable performance for your...
    MSRP: $15.99
    $8.09
  • Odin Works Black XMR 3 Extended Magazine Release Button

    Odin Works Black XMR 3 Extended Magazine Release Button

    $18.89
    OdinWorks Black XMR 3 Extended Magazine Release Button       Title: Elevate Your Firearm Performance with Odin Works Black XMR 3 Extended Magazine Release Button Description: Enhance the functionality and aesthetics of your AR15 or AR10...
    $18.89
  • A1Armory AR-15 31 piece complete lower parts kit with fire control group.

    A1Armory 31 piece Lower Parts Kit

    $44.96
    A1Armory AR-15 Lower Parts Kit       Upgrade your AR-15 build with confidence using the A1Armory AR-15 31-Piece Lower Parts Kit — a complete, precision-machined solution for builders and enthusiasts who demand performance,...
    $44.96
  • Odin Works AR-10 Burnt Bronze XMR 3 Extended Magazine Release Button

    Odin Works Burnt Bronze XMR 3 Extended Magazine Release Button

    $20.69
    Odin Works Burnt Bronze XMR 3 Extended Magazine Release Button       Title: Enhance Your Firearm's Performance with the Odin Works Burnt Bronze XMR 3 Extended Magazine Release Button Description: Upgrade your firearm's functionality with...
    $20.69
  • SKULL - MILSPEC AR-15 TRIGGER GUARD

    AR15 Custom Engraved Reaper Skull Mil-Spec Trigger Guard

    $8.09
    AR-15 Custom Engraved Reaper Skull Milspec Trigger Guard       Description: Elevate your AR-15 to new heights with our Custom Engraved Reaper Skull Mil-Spec Trigger Guard, meticulously crafted for firearm enthusiasts who...
    $8.09
  • AR15 Custom Engraved Distressed Flag Trigger Guard

    AR15 Custom Engraved Distressed Flag Trigger Guard

    $7.88
    AR15 Custom Engraved Distressed Flag Trigger Guard       Upgrade your AR-15 with the Custom Engraved Distressed American Flag Trigger Guard, a perfect blend of rugged design, patriotic detail, and mil-spec reliability. Crafted for builders...
    $7.88
  • DON'T TREAD ON ME - MILSPEC AR-15 TRIGGER GUARD

    AR15 Custom Engraved Don't Tread On Me Mil-Spec Trigger Guard

    $7.88
    AR15 Custom Engraved Don't Tread On Me Mil-Spec Trigger Guard       Title: "AR15 Custom Engraved Don't Tread On Me Snake Mil-Spec Trigger Guard - Elevate Your Firearm with Precision Craftsmanship" Description: Upgrade your AR15 with the...
    $7.88
  • ar15 black PHASE 5 black DIMPLED MAGAZINE RELEASE button

    Phase5 Black Dimpled Magazine Release Button

    $10.79
    Phase 5 Black Dimpled Magazine Release       Black/ Red/ Grey / Blue The Phase 5™ PMR-Dimpled is a CNC machined 6061-T6 billet aluminum magazine release button. Easy to install, the PMR is a drop in component that...
    $10.79
  • Phase5 black Angled Textured Magazine Release

    Phase5 Black Angle Textured Magazine Release

    $11.69
    Phase5 Black Angled Textured Magazine Release       Title: Precision Performance Upgrade: Phase5 Black Angled Textured Magazine Release for Enhanced Firearm Control Description: Elevate your firearm's performance with the Phase 5™...
    $11.69
  • Phase5 Black Oversized Magazine Release (OMR)

    Phase5 Black Oversized Magazine Release (OMR)

    $22.49
    Phase 5 Black Oversized Magazine Release (OMR)           Title: Precision Performance Upgrade: Phase 5 Black Oversized Magazine Release (OMR) for Enhanced Firearm Control Description: Elevate...
    $22.49
  • PHASE5 EXTENDED BOLT RELEASE LOWER PART V1-WWW.A1ARMORY.COM

    Phase5 Black Extended Bolt Release V1

    MSRP: $59.99
    $44.99
    Phase 5 Extended Black Bolt Release V1     The Phase 5™ Extended Bolt Release v1 (EBRv1) is a two-piece heat-treated add-on. When mounted to your existing bolt catch, the EBRV1 helps clear jams and double feeds efficiently, and allows...
    MSRP: $59.99
    $44.99
  • ar15 BLACK Phase5 Winter Trigger Guard

    Phase5 Black Winter Trigger Guard

    MSRP: $29.99
    $26.99
    Phase 5 Black Winter Trigger Guard       Description: Upgrade your firearm's functionality and aesthetics with the newly redesigned Phase 5 Black Winter Trigger Guard (WTG). Crafted from durable Billet Aluminum and finished...
    MSRP: $29.99
    $26.99
  • BLACK Phase5 Extended Bolt Release V3-www.a1armory.com

    Phase5 Black Extended Bolt Catch Release Bad Lever V3

    MSRP: $64.99
    $58.49
    Phase5 Black Extended Bolt Release Bad Lever V3     The Phase 5™ EBRv3 RED and BLUE finish are CERAKOTE. Does not match anodized red/blue components.  The Extended Bolt Release Version 3 was designed to be compatible with all mil...
    MSRP: $64.99
    $58.49
  • M16  AR10  AR15 Selector & Ejector Spring 10 pack lower parts-A1Armory

    10 Pack AR-15/AR-10 Selector & Ejector Spring Set

    $8.51
    10 Pack-A1Armory AR-15/AR-10/M16 Selector/Ejector Spring Set     One of the most common caused for a "failure to eject" is a worn or broken ejector spring.  Springs are considered "wear" items and have a limited service life.  Make...
    $8.51
  • A1Armory AR-15 EJECTOR ROLL PIN for bcg bolt carrier groups-A1Armory lower ar15 parts, quantity and bulk discounts

    10 Pack AR-15 Ejector Roll Pins

    $5.84
    A1Armory AR-15 Ejector Roll Pins 10 Pack       AR-15 ejector roll pins play a crucial role in the functioning of the rifle's ejection system. They are small, cylindrical pins that secure the ejector spring and ejector in place within the...
    $5.84
  • AR-15 Extractor Spring for upper bolt carrier group parts in rifle

    10 Pack AR-15 Mil-Spec Extractor Springs

    $6.29
    10 Pack AR-15 Mil Spec Extractor Springs   Mil-Spec Fits any standard AR-15 / M16 bolt Standard power MADE IN USA                                      ...
    $6.29
  • A1Armory AR-15 Trigger Spring

    A1Armory AR-15 Mil Spec Trigger Spring

    $1.79
    A1Armory AR-15 mil-spec Trigger Spring     A1Armory AR-15 Mil-Spec Trigger Spring, meticulously crafted to exacting mil-spec dimensions for optimal performance. This standard power trigger spring is designed for use on both AR15...
    $1.79
  • A1Armory AR15 Fire Control Group FCG lower parts kit

    A1Armory AR-15 Fire Control Group FCG

    $26.99
    A1Armory AR-15 Fire Control Group FCG       Material Excellence: The A1Armory AR-15 Fire Control Group is crafted with precision using high-quality materials to ensure exceptional durability and performance. The trigger and hammer are...
    $26.99
  • 10-AR-15 Nitride Buffer Retaining Pin

    10 Pack AR-15 Buffer Retaining Pin

    $17.06
    10-AR-15 Nitride Buffer Retaining Pin       10-AR-15 Nitride Buffer Retaining Pins, meticulously engineered to meet and exceed milspec standards. Crafted with precision on state-of-the-art Swiss CNC machines, these buffer retainer pins...
    $17.06
  • AR15 Black Nitride Plunger Bolt Catch lower part for bolt catch assembly

    10 Pack AR-15 Bolt Catch Plunger

    $7.19
    10 -A1Armory AR-15 Nitride Bolt Catch Plunger       Upgrade your AR-15 with the reliable and durable A1Armory AR-15 Nitride Bolt Catch Plunger. Perfect for both enthusiasts and professional gunsmiths, this bolt catch plunger ensures...
    $7.19
  • Presma 31 Piece AR-15 Lower Parts Kit With FCG.

    Presma 31 Piece AR-15 Lower Parts Kit With FCG

    MSRP: $57.99
    $39.59
    Presma 31 Piece AR-15 Lower Parts Kit With FCG                     Build with confidence using the Presma 31 Piece AR-15 Lower Parts Kit—a comprehensive, high-quality set that includes...
    MSRP: $57.99
    $39.59
  • Presma 28 Piece AR-15 Lower Parts Kit .223/5.56

    Presma 28 Piece AR-15 Lower Parts Kit .223/5.56

    MSRP: $44.99
    $31.49
    Presma 28 Piece AR-15 Lower Parts Kit [without FCG]       Upgrade your AR-15 build with the Presma 28 Piece Lower Parts Kit, a high-performance component set designed for reliability, customization, and precision. This...
    MSRP: $44.99
    $31.49
  • A1Armory Skeletonized Black Pistol Grip

    Presma Skeletonized Black Pistol Grip

    MSRP: $49.99
    $35.99
    A1Armory Skeletonized Black Pistol Grip       Lightweight. Rugged. American-Made. Upgrade your AR platform with the A1Armory Skeletonized Black Pistol Grip—a sleek, precision-engineered component that blends ultra-lightweight design...
    MSRP: $49.99
    $35.99
  • AR15 MIL SPEC SPRING KIT WITH TRIGGER SPRING, HAMMER SPRING, FROM A1ARMORY

    AR-15 Mil-Spec Lower Parts Spring Kit

    $4.49
    AR-15 Mil-Spec Lower Parts Spring Kit     Upgrade your AR-15 platform with this comprehensive Mil-Spec Lower Parts Spring Kit, built to exacting standards for dependable performance in every condition. Whether you're assembling a new build or...
    $4.49
  • a1armory ar15 selector detent small lower parts for safety selector

    10 Pack AR-15 Lower Receiver Safety Selector Detents

    MSRP: $16.99
    $11.03
    A1Armory AR-15 Selector Detent 10 Pack Lower Parts         A1Armory AR-15 Selector Detent 10 Pack Lower Parts, meticulously crafted to meet and exceed milspec dimensions, ensuring optimal performance and reliability for...
    MSRP: $16.99
    $11.03
  • A1armory AR-15 Fire Control Group Hammer/Trigger Pin Set

    AR-15 Nitride Fire Control Group Pin Set

    $2.69
    AR-15 Fire Control Group Pin/FCG Pin Set     Upgrade your AR-15 or M16 lower with our premium AR-15 Fire Control Group (FCG) Pin Set, engineered for superior fit, finish, and function. Whether you're assembling a new build or...
    $2.69
  • AR Platform Hammer Spring

    A1armory AR15 Hammer Spring

    $1.79
    AR Platform Hammer Spring                   Title: A1armory USA-Made MIL-SPEC AR-15/M16 Hammer Spring: Elevate Your Firearm's Performance Features: Precision-crafted in the USA to meet MIL-SPEC standards,...
    $1.79
  • AR-15 mil spec DISCONNECT lower trigger parts-www.A1Armory.com

    AR10 / AR15 Disconnector

    MSRP: $5.25
    $4.04
    AR-15 Disconnector       Upgrade your AR-15 or AR-10 platform with the A1Armory AR-15 Disconnector — engineered for precision, durability, and smooth operation. Whether you're building a new rifle or replacing a worn...
    MSRP: $5.25
    $4.04
  • A1armory AR15 Takedown Pivot Pin Detent Set-www.A1Armory.com

    A1armory AR15 Takedown/Pivot Pin Detent Set

    MSRP: $1.99
    $1.79
    AR-15 Pivot Pin & Takedown Pin Detents       Perfect for replacing lost parts or preparing for future builds, these AR-15 Pivot Pin & Takedown Pin Detents are a must-have for any serious gunsmith, armorer, or enthusiast...
    MSRP: $1.99
    $1.79
  • AR15 Takedown/Pivot Springs & Detents Set

    AR15 Takedown/Pivot Springs & Detents Set

    MSRP: $6.99
    $2.69
    AR-15 Takedown / Pivot springs & Detent Pins       Ensure the reliable function of your AR-15’s takedown and pivot pins with this high-quality Mil-Spec Takedown / Pivot Springs & Detent Pin Set. Perfect for builders,...
    MSRP: $6.99
    $2.69
  • 100 Bulk Wholesale AR15 Magazine Catch Spring

    100 Quantity AR15 Magazine Catch Springs

    $31.49
    100 Bulk Wholesale AR15 Magazine Catch Spring       For gunsmiths, builders, and retailers who demand top-tier reliability and performance, this bulk pack of 100 AR-15 Magazine Catch Springs delivers unmatched value and consistency...
    $31.49
  • 10 Pack AR-15 Buffer Retaining Spring

    10 Pack AR-15 Buffer Retaining Spring

    $3.83
    10 Pack A1armory Buffer Retaining Springs       Introducing the 10 Pack A1armory Buffer Retaining Springs, designed for both new builds and as reliable replacements for worn-out parts. Crafted with precision and engineered to exacting...
    $3.83
  • ar15 bolt catch detent spring lower part

    10 Pack AR15 Bolt Catch Springs

    $6.98
    AR-15 Platform Mil-Spec Bolt Catch Springs       Manufactured to milspec dimensions For use on M16, AR15, and AR10, style firearms 100% USA Made Comes in pack of 10                
    $6.98
  • AR15 BOLT CATCH ROLL PIN lower rifle parts for bolt catch assembly

    10 Pack AR15 Bolt Catch Roll Pins

    $5.39
    AR-15 Bolt Catch Roll Pin 10 Pack     Upgrade or maintain your AR-15 with confidence using this high-quality 10-pack of AR-15 Bolt Catch Roll Pins. Whether you're building a rifle from the ground up or replacing worn parts, these pins ensure...
    $5.39
  • On Sale
    Timber Creek Black AR-15 Enforcer Skeletonized Pistol Grip-

    Timber Creek Outdoors AR-15 Black Enforcer Skeletonized Pistol Grips

    MSRP: $99.99
    Now: $71.09
    Was: $84.99
    Timber Creek Outdoors Black AR-15 Enforcer Skeletonized Pistol Grip-        Bring precision, comfort, and cutting-edge design to your AR-15 with the Timber Creek Outdoors Black Enforcer Skeletonized Pistol Grip. This...
    MSRP: $99.99
    Now: $71.09
    Was: $84.99
  • AR15 PARTIAL LOWER PARTS KIT WITH NO TRIGGER GUARD OR MAGAZINE CATCH

    AR-15 Lower Parts Kit with FCG

    MSRP: $59.99
    $49.49
    AR-15 FCG Lower Parts Kit     Our AR-15 FCG Lower Parts Kit is designed specifically for pistol caliber builds, crafted with precision and pride right here in the USA. Whether you're upgrading or assembling a new lower, this kit delivers...
    MSRP: $59.99
    $49.49
  • Timber Creek Black Takedown Pin Sets

    Timber Creek Outdoors AR15 Black Takedown Pin Set

    MSRP: $19.99
    $16.19
    Timber Creek Outdoors Black Takedown Pin Sets       Upgrade your AR-platform rifle with the Timber Creek Outdoors Black Takedown Pin Set, engineered for enhanced function and sleek aesthetics. Whether you’re customizing a...
    MSRP: $19.99
    $16.19