AR-15 Parts

AR-15 Parts

Shop our extensive inventory of AR-15 parts and modern sporting rifle components. From fully assembled upper receivers to enhanced lower parts kits. 

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  • On Sale
    Spike's Tactical - Forged Charging Handle - Black Finish - SUH100F - 855713006982 - Boss Firearms - BossFirearms.com Spike's Tactical - Forged Charging Handle - Black Finish - SUH100F - 855713006982 - Boss Firearms - BossFirearms.com

    Spike's Tactical - Forged Charging Handle - Black Finish SUH100F

    Spike's Tactical

    Now: $22.50
    Was: $25.00
    Standard AR-15 charging handle compatible with all Spike's upper options. Forged 7075 T6 Aluminum Mil-Spec Type-III Hardcoat Anodized UPC 855713006982 Manufacturer Spike's Tactical Manufacturer Part...
    Now: $22.50
    Was: $25.00
    Qty in Cart: 0
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    Now: $22.50
    Was: $25.00
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  • Dead Air Armament - KeyMo Flash Hider 1/2x28 RH - DA301 - 810128160438 - Boss Firearms Dead Air Armament - KeyMo Flash Hider 1/2x28 RH - DA301 - 810128160438 - Boss Firearms

    Dead Air Armament - KeyMo Flash Hider 1/2x28 RH - DA301

    Dead Air Armament

    $89.00
    The Dead Air Armament KeyMo Flash Hider 1/2x28 RH (DA301) is Dead Air's proprietary KeyMo muzzle device for 5.56mm/.223 rifles with 1/2x28 RH threading. The KeyMo Flash Hider simultaneously provides effective flash suppression and serves as the mounting...
    $89.00
    Qty in Cart: 0
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    $89.00
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  • On Sale
    Magpul MOE SL Carbine Stock Fits AR-15, Mil-Spec FDE - MAG347-FDE - 873750002071 - Boss Firearms - BossFirearms.com

    Magpul MOE SL Carbine Stock Fits AR-15, Mil-Spec FDE MAG347-FDE

    Magpul Industries

    Now: $61.70
    Was: $64.95
    The Magpul MOE SL Carbine Stock — Mil-Spec, FDE (MAG347-FDE) is Magpul's slim-line (SL) 6-position adjustable carbine stock for AR-15/M4 mil-spec buffer tubes, finished in FDE (Flat Dark Earth). The MOE SL features a sleeker, lower-profile design than...
    Now: $61.70
    Was: $64.95
    Qty in Cart: 0
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    Now: $61.70
    Was: $64.95
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  • On Sale
    Magpul MS4 QDM Sling Fits AR Rifles Coyote Brown - MAG953-COY - 840815119425 - Boss Firearms - BossFirearms.com

    Magpul MS4 QDM Sling Fits AR Rifles Coyote Brown MAG953-COY

    Magpul Industries

    MSRP: $79.95
    Now: $75.95
    Was: $79.95
    The Magpul MS4 QDM Sling — Coyote Brown (MAG953-CB) is Magpul's versatile convertible two-point/one-point sling in Coyote Brown for FDE/coyote-configured AR-15/M4 rifles. All features of the standard MS4 QDM apply: quick conversion between two-point and...
    MSRP: $79.95
    Now: $75.95
    Was: $79.95
    Qty in Cart: 0
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    MSRP: $79.95
    Now: $75.95
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  • Knight's Armament - Rib Rail Panel - #95047 - 819064010616 - Boss Firearms - BossFirearms.com Knight's Armament - Rib Rail Panel - #95047 - 819064010616 - Boss Firearms - BossFirearms.com

    Knight's Armament - Rib Rail Panel - 95047

    Knights Armament Company

    MSRP: $27.99
    $26.74
    The Knight's Armament Rib Rail Panel (KAC PN: 95047) is KAC's ribbed polymer rail panel for covering unused slots on KAC RAS (Rail Adapter System) Picatinny quad-rail handguards. The rib design provides additional grip texture to the handguard surface...
    MSRP: $27.99
    $26.74
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    MSRP: $27.99
    $26.74
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  • Knights Armament - Free Float Rifle RAS -  21318 - 819064015161 - Boss Firearms - BossFirearms.com Knights Armament - Free Float Rifle RAS -  21318 - 819064015161 - Boss Firearms - BossFirearms.com

    Knights Armament - Free Float Rifle RAS - 21318

    Knights Armament Company

    $452.52
    The Knight's Armament Free Float Rifle RAS (KAC PN: 21318) is KAC's free-float Rifle-length Rail Adapter System for AR-15/M16 pattern rifles. The KAC RAS (Rail Adapter System) provides full-length MIL-STD-1913 Picatinny rail coverage on all four sides of...
    $452.52
    Qty in Cart: 0
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    $452.52
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  • Knight's Armament - M-LOK Index Stop - #113886 - 819064017431 - Boss Firearms - BossFirearms.com

    Knight's Armament - M-LOK Index Stop - 113886

    Knights Armament Company

    $59.64
    The Knight's Armament M-LOK Index Stop (KAC PN: 113886) is KAC's precision-machined M-LOK index stop for use on M-LOK compatible handguards, primarily the KAC URX 4 series. The index stop provides a positive reference point for consistent support hand...
    $59.64
    Qty in Cart: 0
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    $59.64
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  • Out of stock
    On Sale
    LMT Defense - Buffer Tube Kit - 5.56 - #LM556BTK - 815415016269 - Boss Firearms

    LMT Defense - Buffer Tube Kit - 5.56 - #LM556BTK

    LMT Defense

    MSRP: $97.00
    Now: $87.30
    Was: $90.00
    LMT Defense kept the AR builders in mind with this essential kit for your next project. The LM556BTK is ready to install in your stripped lower. Kit ships with a dry film lubed, Mil-Spec 6 position tube, standard buffer spring, 3oz buffer, standard...
    MSRP: $97.00
    Now: $87.30
    Was: $90.00
    Qty in Cart: 0
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    MSRP: $97.00
    Now: $87.30
    Was: $90.00
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  • Out of stock
    LMT DEFENSE - STANDARD FULL AUTO BOLT CARRIER GROUP - 5.56 - R-L7D3 - 815415010137 - Boss Firearms

    LMT Defense - Standard 5.56 Full-Auto Bolt Carrier Group - #R-L7D3

    LMT Defense

    $304.20
    Full Auto Bolt Carrier Group, 5.56×45 (.223) The L7D3 is the perfect BCG for a Mil-Spec build or upgrade from sub-par equipment. LMT Defense has made the full-auto M16/M4 BCG and its components for years replacement parts for the United States hard...
    $304.20
    Qty in Cart: 0
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    $304.20
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  • Out of stock
    On Sale
    LMT Defense - 5.56mm 14.5" Chrome Lined MRP Barrel Assembly - L7NE1B - 815415016764 - Boss Firearms - BossFirearms.com

    LMT Defense - 5.56mm 14.5" Chrome Lined MRP Barrel Assembly - L7NE1B

    LMT Defense

    Now: $538.20
    Was: $554.40
    This is a new Lewis Machine & Tool 14.5-inch MRP barrel chambered for .223/5.56mm. It features a 1/2x28 threaded A2 birdcage flash hider, low profile gas block with a mid-length straight gas tube, and a chrome-lined bore with a 1:7 right hand twist...
    Now: $538.20
    Was: $554.40
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    Now: $538.20
    Was: $554.40
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  • LMT Defense - 12" Piston MRP 5.56mm Barrel Assembly - #L7MC1B - 815415011455 - Boss Firearms - BossFirearms.com

    LMT Defense - 12" Piston MRP 5.56mm Barrel Assembly - #R-L7MC1B

    LMT Defense

    $716.85
    12″ Piston Chrome Lined 5.56×45 (.223) 1:7″ RH twist barrel Designed for the LMT monolithic receiver, this barrel utilizes a piston operating rod and has an A2 birdcage for reduced flash. The barrel is coated and cryogenically treated...
    $716.85
    Qty in Cart: 0
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    $716.85
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  • Knights Armament - Barrel Extension Action Wrench - 30447 - 819064011163 - Boss Firearms - BossFirearms.com

    Knights Armament - Barrel Extension Action Wrench - 30447

    Knights Armament Company

    MSRP: $101.35
    $96.28
    The Knight's Armament Barrel Extension Action Wrench (KAC PN: 30447) is KAC's purpose-designed action wrench for removing and installing barrel extensions on SR-15, SR-25, and other KAC platforms. This specialized tool is required for proper barrel...
    MSRP: $101.35
    $96.28
    Qty in Cart: 0
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    MSRP: $101.35
    $96.28
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