AR-15 Parts

AR-15 Parts

Shop our extensive inventory of AR-15 parts and modern sporting rifle (MSR) components. From fully assembled MIL-SPEC upper receivers and enhanced lower parts kits to free-float M-LOK handguards and ambidextrous controls, we carry the critical components required for duty, defense, and custom builds.

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  • Knights Armament - M5 Rifle RAS Forend Assembly - 98065 - 819064012368 - Boss Firearms - BossFirearms.com

    Knights Armament - M5 Rifle RAS Forend Assembly - #98065

    Knights Armament Company

    MSRP: $344.66
    $329.28
    The KAC M5 RAS (Rail Adapter System) was developed for use on the US military?s M16A4, and with hundreds of thousands of rails issued to date, it is one of the most battle proven designs available...
    MSRP: $344.66
    $329.28
    Qty in Cart: 0
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    MSRP: $344.66
    $329.28
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  • Sons of Liberty Gun Works - SOLGW - M76 9.5" Stripped Upper Receiver - M76-9.5 - 691821559107 - Boss Firearms - BossFirearms.com

    Sons of Liberty Gun Works - M76 9.5" M-LOK Wedge Lock Rail - M76-9.5

    Sons of Liberty Gunworks

    $315.00
    This is a new Sons of Liberty Gunworks M76 9.5-inch wedge lock rail compatible with AR-15 pattern firearms. It features aluminum construction, top mounted picatinny rail, 4140 Steel barrel nut, QD...
    $315.00
    Qty in Cart: 0
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    $315.00
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  • Out of stock
    Sons of Liberty Gunworks - SOLGW - M76 Wedge Lock Rail M-LOK 10.5" - #M76-10.5 - Boss Firearms - BossFirearms.com

    Sons of Liberty Gunworks - M76 10.5" M-LOK Wedge Lock Rail - #M76-10.5

    Sons of Liberty Gunworks

    $320.25
    The Sons of Liberty Gun Works M76 M-LOK Handguard features their new wedgelock attachment system that keeps the free float handguard locked tight against the 4140 steel barrel nut. This is the 10.5”...
    $320.25
    Qty in Cart: 0
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    $320.25
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  • Sons of Liberty Gunworks - M76 15" M-LOK Wedge Lock Rail  - M76-15

    Sons of Liberty Gunworks - M76 15" M-LOK Wedge Lock Rail - M76-15

    Sons of Liberty Gunworks

    $345.00
    This is a new Sons of Liberty Gunworks M76 15-inch wedge lock rail compatible with AR-15 pattern firearms. It features aluminum construction, top mounted picatinny rail, and M-LOK rails for...
    $345.00
    Qty in Cart: 0
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    $345.00
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  • On Sale
    Surefire - 4-Prong Flash Hider - 5.56mm - 1/2x28mm - FH556RC-1/2-28

    Surefire - 4-Prong Flash Hider - 5.56mm - 1/2x28mm - FH556RC-1/2-28

    Surefire

    MSRP: $199.00
    Now: $179.00
    Was: $199.00
    The SureFire 4-Prong Flash Hider — 5.56mm 1/2x28 (FH556RC-1/2-28) is SureFire's aggressive 4-prong flash hider for 5.56mm rifles, designed to provide extremely effective flash reduction while...
    MSRP: $199.00
    Now: $179.00
    Was: $199.00
    Qty in Cart: 0
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    MSRP: $199.00
    Now: $179.00
    Was: $199.00
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  • On Sale
    Surefire - Warden 5.56/7.62 Blast Regulator for SOCOM Muzzle Device - WARDEN-DE - 84871325097 BossFirearms - BossFirearms.com

    Surefire - Warden 5.56/7.62 Blast Regulator for SOCOM Muzzle Device - WARDEN-DE

    Surefire

    MSRP: $329.00
    Now: $296.00
    Was: $329.00
    The SureFire Warden 5.56/7.62 Blast Regulator — Desert Earth/FDE (WARDEN-DE) is SureFire's Warden blast regulator in Desert Earth finish for use with FDE-configured rifles. All features of the...
    MSRP: $329.00
    Now: $296.00
    Was: $329.00
    Qty in Cart: 0
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    MSRP: $329.00
    Now: $296.00
    Was: $329.00
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  • AB Suppressor - Raptor Muzzle Thread Adapter - TA-1/2-28 - 679065311323 - Boss Firearms - BossFirearms.com

    AB Suppressor - Raptor Muzzle Thread Adapter - TA-1/2-28

    AB Suppressor

    $26.00
    The AB Suppressor Raptor Muzzle Thread Adapter with 1/2-28 threads (TA-1/2-28) converts your Raptor series suppressor to a 1/2-28 thread pitch, enabling use on 5.56/.223 AR-15s and other platforms...
    $26.00
    Qty in Cart: 0
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    $26.00
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  • Out of stock
    Proof Research Carbon Fiber LMT MWS Converted 6.5CM Barrel - PRCFMWS

    Proof Research - Carbon Fiber LMT MWS Converted 6.5CM Barrel - PRCFMWS-CONV

    Proof Research

    $1,250.00
    Proof Research carbon fiber 6.5 CM barrel converted by D.Wilson Mfg to fit LMT's MWS platform. These barrels are 8 twist, 4 groove, 5/8-24 threaded and accept an .875 gas block. Proof Research PR10 6...
    $1,250.00
    Qty in Cart: 0
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    $1,250.00
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  • LMT DEFENSE M203 QD MOUNTING BRACKET - 12973116 - Boss Firearms - BossFirearms.com

    LMT Defense - M203 Quick Detach Mounting Bracket - C-12973116

    LMT Defense

    MSRP: $348.00
    $322.65
    The LMT Defense M203 Quick Detach Mounting Bracket (C-12973116) is a quick-detach mounting bracket for LMT M203 grenade launcher systems. This QD bracket enables faster installation and removal of...
    MSRP: $348.00
    $322.65
    Qty in Cart: 0
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    MSRP: $348.00
    $322.65
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  • LMT Defense - M203 BARREL 9” - LMP380 - 815415010441 - Boss Firearms - BossFirearms.com

    LMT Defense - M203 BARREL 9” - LMP380

    LMT Defense

    MSRP: $598.00
    $554.40
    The LMT Defense M203 Barrel 9" (LMP380) is a 40mm grenade launcher barrel assembly — NSN: 1010-01-611-3461. This 9-inch M203 barrel is compatible with LMT's Classic M203 Receiver (LMP300E) and Rail...
    MSRP: $598.00
    $554.40
    Qty in Cart: 0
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    MSRP: $598.00
    $554.40
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  • LMT DEFENSE M203 BARREL 7” - LMP350 - Boss Firearms

    LMT Defense - M203 Barrel 7” - #LMP350

    LMT Defense

    MSRP: $598.00
    $554.40
    LMT Defense M203 GRENADE LAUNCHER BARREL ASSEMBLY, 7″ This barrel is exclusively compatible with our L2X1 model “Shorty 40” grenade launcher.
    MSRP: $598.00
    $554.40
    Qty in Cart: 0
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    MSRP: $598.00
    $554.40
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  • On Sale
    LMT Defense - Ambidextrous Charging Handle Assembly - .308 - #R-LM308CB - 815415016610 - Boss Firearms

    LMT Defense - Ambidextrous Charging Handle Assembly - .308 - #R-LM308CB

    LMT Defense

    Now: $145.80
    Was: $150.30
    LMT Defense Ambidextrous .308 Charging Handle with Enhanced Tactical Latch. Utilizes dead stop latches to reduce tension on latch pins. A great cost effective upgrade for any SR-25 pattern modern...
    Now: $145.80
    Was: $150.30
    Qty in Cart: 0
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    Now: $145.80
    Was: $150.30
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