Uppers, Gas Blocks, Flash Supressors

M4 / M16 / AR15 Upper Receiver Parts and Accessories

We encourage you to browse through our real time inventory of AR-15 upper receiver parts and accessories such as bolts, carriers, AR gas blocks, charging handles, flash suppressors and replacement parts. We are proud to offer products from such high quality manufacturers as Badger Ordnance, GG&G, KAC-Knights Armament, LMT-Lewis Machine & Tool, PRI-Precision Reflex, RRA-Rock River Arms, Smith Enterprise, Troy Industries, Vltor, and Yankee Hill Machine. Whether you’re looking for AR15 uppers or an AR15 gas block, we have the AR15 parts and accessories that you need.

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  • KNIGHT'S ARMAMENT TRIGGER GUARD ROLL PIN $2.99
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  • Knight's Armament Upper Receiver Kit, SR-15 LPR MOD 2, 18" Barrel, URX 4, M-LOK
    Knight's Armament Upper Receiver Kit, SR-15 LPR MOD 2, 18" Barrel, URX 4, M-LOK $1,966.16
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  • KNIGHT'S ARMAMENT URX II FRONT SIGHT BUTTON ROLL PIN $4.31
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  • Knights Armament SR-15 E3 Firing Pin
    Knights Armament SR-15 E3 Firing Pin $32.66
    Out of stock
  • Knights Armament SR-15/SR-16 E3 Cam Pin
    Knights Armament SR-15/SR-16 E3 Cam Pin $22.50
    Out of stock
  • Knights Armament SR-25 Field Repair Kit, Single Ejector Style, Not For E2 Bolt
    Knights Armament SR-25 Field Repair Kit, Single Ejector Style, Not For E2 Bolt $282.44
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  • LMT-Lewis Machine & Tool 10.5" Upper Receiver Assembly With Flash Suppressor
    LMT-Lewis Machine & Tool 10.5" Upper Receiver Assembly With Flash Suppressor $565.27
    Out of stock
  • LMT-Lewis Machine & Tool 16" Upper Receiver Assembly W/Flash Suppressor
    LMT-Lewis Machine & Tool 16" Upper Receiver Assembly W/Flash Suppressor $565.27 $524.95
    Out of stock
  • LMT-Lewis Machine & Tool 7.62mm Semi-Auto Bolt Carrier Group Assembly
    LMT-Lewis Machine & Tool 7.62mm Semi-Auto Bolt Carrier Group Assembly $429.00
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  • LMT-Lewis Machine & Tool Charging Handle Assembly With LMT Tactical Latch
    LMT-Lewis Machine & Tool Charging Handle Assembly With LMT Tactical Latch $54.98
    Out of stock
  • LMT-Lewis Machine & Tool Crane O-Ring For Extractor
    LMT-Lewis Machine & Tool Crane O-Ring For Extractor $3.75
    Out of stock
  • LMT-Lewis Machine & Tool Enhanced Bolt Assembly .223, LMT
    LMT-Lewis Machine & Tool Enhanced Bolt Assembly .223, LMT $179.03
    Out of stock
  • LMT-Lewis Machine & Tool Enhanced Bolt Carrier, Semi-Auto .223 $138.60
    Out of stock
  • LMT-Lewis Machine & Tool Enhanced Bolt Extractor Spring
    LMT-Lewis Machine & Tool Enhanced Bolt Extractor Spring $5.25
    Out of stock
  • LMT-Lewis Machine & Tool Improved Semi-Auto Bolt Carrier Group Assembly
    LMT-Lewis Machine & Tool Improved Semi-Auto Bolt Carrier Group Assembly $329.18
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  • LMT-Lewis Machine & Tool M16 Full-Auto Enhanced Bolt And Carrier Group
    LMT-Lewis Machine & Tool M16 Full-Auto Enhanced Bolt And Carrier Group $329.18
    Out of stock
  • LMT-Lewis Machine & Tool Spare Extractor For AR-15 5.56mm Enhanced Bolts
    LMT-Lewis Machine & Tool Spare Extractor For AR-15 5.56mm Enhanced Bolts $46.20
    Out of stock
  • LMT-Lewis Machine & Tool Spare Extractor For AR-15 5.56mm Standard Bolts
    LMT-Lewis Machine & Tool Spare Extractor For AR-15 5.56mm Standard Bolts $18.67
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  • LMT-Lewis Machine & Tool Spare Extractor Spring AR-15 5.56mm Standard Bolts
    LMT-Lewis Machine & Tool Spare Extractor Spring AR-15 5.56mm Standard Bolts $5.25
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  • LMT-Lewis Machine & Tool Standard Bolt Assembly
    LMT-Lewis Machine & Tool Standard Bolt Assembly $79.70
    Out of stock
  • LMT-Lewis Machine & Tool Standard Charging Handle Assembly
    LMT-Lewis Machine & Tool Standard Charging Handle Assembly $26.50
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  • LMT-Lewis Machine & Tool Standard M16 Full-Auto Bolt Carrier Group
    LMT-Lewis Machine & Tool Standard M16 Full-Auto Bolt Carrier Group $201.60
    Out of stock
  • LMT-Lewis Machine & Tool Standard M16 Full-Auto Carrier Group With Enhanced Bolt
    LMT-Lewis Machine & Tool Standard M16 Full-Auto Carrier Group With Enhanced Bolt $261.95
    Out of stock
  • LMT-Lewis Machine & Tool Standard Semi-Auto Bolt Carrier
    LMT-Lewis Machine & Tool Standard Semi-Auto Bolt Carrier $107.23
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  • LMT-Lewis Machine & Tool Standard Semi-Auto Bolt Carrier Group
    LMT-Lewis Machine & Tool Standard Semi-Auto Bolt Carrier Group $201.60
    Out of stock
  • M16 Complete Bolt Carrier Group Assembly w/Daniel Defense Logo
    M16 Complete Bolt Carrier Group Assembly w/Daniel Defense Logo $195.00 $185.00
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  • Magpul AR-15 Polymer MOE M-Lok Handguard, Mid-Length
    Magpul AR-15 Polymer MOE M-Lok Handguard, Mid-Length, 9.18 in $34.95 $33.20
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  • Magpul Extended Length Rail Protector, Ladder
    Magpul Extended Length Rail Protector, Ladder $11.95 $11.35
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  • Magpul M-LOK™ Cantilever Rail/Light Mount, Aluminum
    Magpul M-LOK™ Cantilever Rail/Light Mount, Aluminum $34.95 $33.20
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  • Magpul M-LOK™ T-Nut Replacement Set
    Magpul M-LOK™ T-Nut Replacement Set $5.95 $5.65
    Out of stock
  • Magpul MOE Cantilever Rail, Black
    Magpul MOE Cantilever Rail, Black $7.95 $7.55
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  • Magpul MOE Illumination Kit, Black
    Magpul MOE Illumination Kit, Black $19.95 $18.95
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  • Magpul MOE Polymer L2 Rail Section With 5 Slots, Fits MOE Handguards
    Magpul MOE Polymer L2 Rail Section With 5 Slots, Fits MOE Handguards $5.95 $5.65
    Out of stock
  • Magpul MOE Polymer L3 Rail Section With 7 Slots, Fits MOE Handguards
    Magpul MOE Polymer L3 Rail Section With 7 Slots, Fits MOE Handguards $6.95 $6.60
    Out of stock
  • Magpul MOE Polymer L4 Rail Section With 9 Slots, Fits MOE Handguards
    Magpul MOE Polymer L4 Rail Section With 9 Slots, Fits MOE Handguards $7.95 $7.55
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  • Magpul MOE Polymer L5 Rail Section With 11 Slots, Fits MOE Handguards
    Magpul MOE Polymer L5 Rail Section With 11 Slots, Fits MOE Handguards $8.95 $8.50
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  • Magpul MOE Scout Mount, Left Side Model, Black
    Magpul MOE Scout Mount, Left Side Model, Black $9.95 $9.45
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  • Magpul MOE Scout Mount, Right Side Model, Black
    Magpul MOE Scout Mount, Right Side Model, Black $9.95 $9.45
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  • Magpul Polymer MOE Handguard, Carbine Length
    Magpul Polymer MOE Handguard, Carbine Length $24.95 $23.70
    Out of stock
  • Magpul XT Rail Texture Panel
    Magpul XT Rail Texture Panel $11.95 $11.35
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