AR-15 Parts

AR-15 Parts

Welcome to A1Armory.com! The top choice for deals on AR-15 parts, kits, accessories and more. All discounted priced and backed by outstanding customer service. Made in America with warranties!

  • AR-15 Receiver Extension End Plates

    AR-15 Mil Spec Receiver End Plates

    MSRP: $6.29
    $3.91
    AR-15 Mil Spec Receiver End Plates       Our end plates are stamped, heat treated, and phosphate coated for long-term corrosion resistance. Features: Mil-Spec Hardened Phosphate Coated Made in...
    MSRP: $6.29
    $3.91
  • 10 AR10  AR15 Pivot & Takedown Pin Springs in bulk

    10 AR10 / AR15 Pivot & Takedown Pin Springs

    MSRP: $15.99
    $8.27
    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
    $8.27
  • A1Armory AR-15 31 piece complete lower parts kit with fire control group.

    A1Armory 31 piece Lower Parts Kit

    $45.95
    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,...
    $45.95
  • OdinWorks 223 Black Nitride Bolt Carrier Group

    OdinWorks 223 Black Nitride Bolt Carrier Group

    $119.59
    Odin Works .223/5.56/.300 Black Nitride Bolt Carrier Group-FREE SHIPPING     Features: Mil-Spec dimensions Bolt Carrier Group Material: Case Hardened 8620 Steel Finish: Black Nitride. This advanced low friction coating minimizes the need for...
    $119.59
  • blue Odin Works 15.5" BLUE 02 Lite M-Lok Handguard

    Odin Works Blue 15.5" 02 Lite M-Lok Handguard

    $192.97
    Odin Works 15.5" 02 Lite M-Lok Handguard-FREE SHIPPING!   The O2 Lite Hand guard is the latest and lightest of all the ODIN Works forends. Precision machined from 6005-T651, the O2 lite is a full 20% lighter than its predecessors. All ODIN Works...
    $192.97
  • ODIN WORKS AR15 .223 Wylde 16.1 Mid Length Barrel

    Odin Works AR15 .223 Wylde 16.1" Mid Length Stainless Steel Barrel

    $303.59
      Odin Works .223 16.1" Mid Length Barrel-FREE SHIPPING!             Description: Elevate your AR15 performance to unparalleled levels with the Odin Works .223 16.1" Mid-Length Barrel. Crafted with precision and...
    $303.59
  • Odin Works 223 Wylde  16.1" Intermediate Barrel

    Odin Works .223 Wylde 18" 3-gun Intermediate Barrel

    $320.15
      Odin Works .223 Wylde 18" 3-gun Intermediate Barrel- FREE SHIPPING!           The Odin Works .223 Wylde 18" 3-gun Intermediate Barrel is a high-quality barrel engineered for exceptional accuracy and reliability in...
    $320.15
  • Odin Works 223 Wylde  16.1" Intermediate Barrel

    Odin Works .223 Wylde 16.1" Intermediate Barrel

    $321.99
    Odin Works .223 Wylde 16.1" Intermediate Barrel W Free Adjustable Gas Block-FREE SHIPPING!       Experience the ultimate in accuracy and adaptability with the Odin Works .223 Wylde 16.1" Intermediate Barrel. This exceptional barrel is...
    $321.99
  • SKULL - MILSPEC AR-15 TRIGGER GUARD

    AR15 Custom Engraved Reaper Skull Mil-Spec Trigger Guard

    $8.27
    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...
    $8.27
  • AR15 Custom Engraved Distressed Flag Trigger Guard

    AR15 Custom Engraved Distressed Flag Trigger Guard

    $8.05
    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...
    $8.05
  • DON'T TREAD ON ME - MILSPEC AR-15 TRIGGER GUARD

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

    $8.05
    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...
    $8.05
  • ar15 black PHASE 5 black DIMPLED MAGAZINE RELEASE button

    Phase5 Black Dimpled Magazine Release Button

    $11.03
    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...
    $11.03
  • Phase5 black Angled Textured Magazine Release

    Phase5 Black Angle Textured Magazine Release

    $11.95
    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™...
    $11.95
  • AR-15 CHROME LINED BLACK PHOSPHATE COMPLETE BOLT CARRIER GROUP

    Phase5 AR-15 Chrome Lined Complete Bolt Carrier Group

    $137.07
    Phase5 AR-15 Chrome Lined Complete Bolt Carrier Group-FREE SHIPPING!     Phase 5’s Mil-spec AR-15 bolt carrier features a heat treated and chrome lined inner with a black phosphate coating. The complete bolt carrier group includes cam...
    $137.07
  • Phase5 Black Oversized Magazine Release (OMR)

    Phase5 Black Oversized Magazine Release (OMR)

    $22.99
    Phase 5 Black Oversized Magazine Release (OMR)           Title: Precision Performance Upgrade: Phase 5 Black Oversized Magazine Release (OMR) for Enhanced Firearm Control Description: Elevate...
    $22.99
  • On Sale
    M16 / M4 CHROME LINED BLACK PHOSPHATE COMPLETE BOLT CARRIER GROUP

    Phase5 M16 / M4 Chrome Lined Complete Bolt Carrier Group

    Now: $147.19
    Was: $165.00
    M16/M4 Chrome Lined Black Phosphate Bolt Carrier Group-FREE SHIPPING!     Phase 5’s Mil-spec M-16 / M4 bolt carrier features a heat treated and chrome lined inner with a black phosphate coating. The complete bolt carrier group includes...
    Now: $147.19
    Was: $165.00
  • PHASE5 EXTENDED BOLT RELEASE LOWER PART V1-WWW.A1ARMORY.COM

    Phase5 Black Extended Bolt Release V1

    MSRP: $59.99
    $45.99
    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
    $45.99
  • ar15 BLACK Phase5 Winter Trigger Guard

    Phase5 Black Winter Trigger Guard

    MSRP: $29.99
    $27.59
    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
    $27.59
  • AR-15 Forward Assist Spring lower part

    10 Pack AR15 Forward Assist Springs

    $5.51
    10-AR15 / AR10 Lower Parts - Forward Assist Springs       Title: "Premium 10-Pack AR15/AR10 Lower Parts - Forward Assist Springs" Product Description: Upgrade your firearm's performance with our premium 10-Pack AR15/AR10 Lower Parts -...
    $5.51
  • M16  AR10  AR15 Selector & Ejector Spring 10 pack lower parts-A1Armory

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

    $8.69
    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...
    $8.69
  • AR-15 Gas Key Screw

    AR15/AR10 Gas Key Screw

    $1.83
    AR-15 Gas Key Screw       Title: Precision-Engineered AR-15 Gas Key Screw - Enhance Your Firearm's Performance Description: Upgrade your AR-15, M16, or AR-10 with our top-of-the-line Gas Key Screw, meticulously designed for...
    $1.83
  • 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

    $5.97
    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...
    $5.97
  • AR-15 Extractor Spring for upper bolt carrier group parts in rifle

    10 Pack AR-15 Mil-Spec Extractor Springs

    $8.27
    10 Pack AR-15 Mil Spec Extractor Springs   Mil-Spec Fits any standard AR-15 / M16 bolt Standard power MADE IN USA                                      ...
    $8.27
  • A1Armory AR-15 Trigger Spring

    A1Armory AR-15 Mil Spec Trigger Spring

    $1.83
    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 and...
    $1.83
  • On Sale
    Guntec AR-15 flat dark earth Essentials Furniture Kit

    Guntec AR-15 Flat Dark Earth Essentials Kit

    Now: $228.11
    Was: $279.95
    Guntec AR-15 Flat Dark Earth Essentials Kit- FREE SHIPPING     Essentials AR-15 Flat Dark Earth Kit Includes: Flat Dark Earth Gen 3 Gate Flat Dark Earth Mil-Spec Buffer Tube Complete Assembly Flat Dark Earth 5.56...
    Now: $228.11
    Was: $279.95
  • AR15 Barrel - 5.56 Carbine Length 16 18 Twist, M4 Profile-www.A1Armory.com

    AR15 16" 5.56 Nitride M4 Carbine Length Barrel

    MSRP: $88.99
    $68.99
    AR15 16" 5.56 Nitride M4 Carbine Length Barrel        Looking for a battle-proven barrel that blends durability, performance, and value? This AR-15 16" 5.56 NATO M4 Carbine-Length Barrel is designed to meet the demands of shooters who...
    MSRP: $88.99
    $68.99
  • A1Armory AR15 Fire Control Group FCG lower parts kit

    A1Armory AR-15 Fire Control Group FCG

    $27.59
    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...
    $27.59
  • 10-AR-15 Nitride Buffer Retaining Pin

    10 Pack AR-15 Buffer Retaining Pin

    $17.43
    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...
    $17.43
  • AR15 Black Nitride Plunger Bolt Catch lower part for bolt catch assembly

    10 Pack AR-15 Bolt Catch Plunger

    MSRP: $8.49
    $7.81
    AR-15 Nitride Bolt Catch Plunger       Upgrade your rifle with the dependable AR-15 Nitride Bolt Catch Plunger, designed for smooth bolt catch operation and long-lasting performance. Whether you're building a new rifle or...
    MSRP: $8.49
    $7.81
  • Presma 31 Piece AR-15 Lower Parts Kit With FCG.

    Presma 31 Piece AR-15 Lower Parts Kit With FCG

    MSRP: $57.99
    $40.47
    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
    $40.47
  • 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
    $32.19
    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
    $32.19
  • A1Armory Skeletonized Black Pistol Grip

    Presma Skeletonized Black Pistol Grip

    MSRP: $49.99
    $45.99
    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
    $45.99
  • A1Armory AR-15 Black Pistol Length Gas Tube With Roll Pin

    Black Nitride Pistol Length Gas Tube With Roll Pin

    MSRP: $15.99
    $11.95
    A1Armory AR-15 Black Pistol Length Gas Tube With Roll Pin      This is our Mil-Spec Pistol Length Gas tube, made in the U.S.A. Provides optimal heat and corrosion resistance and consistent gas flow. Length: 6.75" Steel...
    MSRP: $15.99
    $11.95
  • AR15 MIL SPEC SPRING KIT WITH TRIGGER SPRING, HAMMER SPRING, FROM A1ARMORY

    AR-15 Mil-Spec Lower Parts Spring Kit

    $4.59
    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...
    $4.59
  • a1armory ar15 selector detent small lower parts for safety selector

    10 Pack AR-15 Lower Receiver Safety Selector Detents

    MSRP: $16.99
    $11.27
    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
    $11.27
  • A1armory AR-15 Fire Control Group Hammer/Trigger Pin Set

    AR-15 Nitride Fire Control Group Pin Set

    $2.75
    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...
    $2.75
  • AR Platform Hammer Spring

    A1armory AR15 Hammer Spring

    $1.83
    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,...
    $1.83
  • AR-15 mil spec DISCONNECT lower trigger parts-www.A1Armory.com

    AR10 / AR15 Disconnector

    MSRP: $5.99
    $4.13
    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: $5.99
    $4.13
  • A1armory AR15 Takedown Pivot Pin Detent Set-www.A1Armory.com

    A1armory AR15 Takedown/Pivot Pin Detent Set

    MSRP: $1.99
    $1.83
    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
    $1.83

AR-15 Parts – Build, Customize & Maintain Your Rifle

At A1Armory.com, we carry a full selection of high-quality AR-15 parts designed for shooters who demand reliability, performance, and customization options. Whether you’re building your first AR from the ground up, upgrading components for improved handling, or replacing worn parts, we provide everything you need in one place.

Why Choose Our AR-15 Parts?
✅ Wide Selection – From barrels, triggers, handguards, and stocks to small pins, springs, and buffer assemblies, we stock all the essential AR-15 components.
✅ Premium Materials – Every part is crafted from durable materials like 4150 Chrome Moly Vanadium steel, 7075-T6 aluminum, and stainless steel to ensure strength and long service life.
✅ Cerakote & Anodized Colors – Personalize your rifle with a variety of Cerakote finishes and anodized colors including Flat Dark Earth (FDE), Burnt Bronze, Zombie Green, and more.
✅ Made in the USA Options – We proudly carry parts manufactured in the United States, built to meet strict Mil-Spec standards.
✅ Affordable & Trusted – Competitive pricing backed by our small, family-owned business ethos means you get dependable parts with unmatched service.

Build It Your Way
Whether you want a precision long-range rifle, a lightweight competition build, or a tactical carbine, our parts catalog gives you the freedom to customize your AR-15 exactly how you want it. From complete upper and lower assemblies to individual components, we ensure compatibility, performance, and trusted quality in every piece we sell.