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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  • KAC - Knight's Armament SR-15/SR-16 Complete Bolt Carrier
    KAC - Knight's Armament SR-15/SR-16 Complete Bolt Carrier $144.74
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  • KAC - Knight's Armament SR-15E3 SBR 11.5" Barrel Upper Kit
    KAC - Knight's Armament SR-15E3 SBR 11.5" Barrel Upper Kit $1,625.00
    Out of stock
  • KAC - Knight's Armament SR-25 E2 Complete Bolt
    KAC - Knight's Armament SR-25 E2 Complete Bolt $587.99
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  • KAC - Knight's Armament SR-25 Enhanced Bolt Carrier Assy w/ Enhanced Gas key
    KAC - Knight's Armament SR-25 Enhanced Bolt Carrier Assy w/ Enhanced Gas key $577.50
    Out of stock
  • KAC-Knight's Armament  SR-30 DSR Mod 2 Upper Receiver, 9.5" Barrel M-LOK
    KAC-Knight's Armament SR-30 DSR Mod 2 Upper Receiver, 9.5" Barrel M-LOK $1,833.44
  • Black
    KAC-Knight's Armament 11 Rib Handguard Panel, 6.15 Inch Length $25.26
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  • KAC-Knight's Armament 2 Rib Handguard Panel, 1.65 Inch Length, Black
    KAC-Knight's Armament 2 Rib Handguard Panel, 1.65 Inch Length, Black $22.61
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  • KAC-Knight's Armament 4 Rib Handguard Panel, 2.65 Inch Length, Black
    KAC-Knight's Armament 4 Rib Handguard Panel, 2.65 Inch Length, Black $22.60
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  • KAC-Knight's Armament 5 Rib Handguard Panel, 3.47 Inch Length, Black
    KAC-Knight's Armament 5 Rib Handguard Panel, 3.47 Inch Length, Black $22.60
    Out of stock
  • KAC Knight's Armament 5.56mm Mini-MAMS (Multi-Axis Muzzle Stability) Brake (30168)
    KAC-Knight's Armament 5.56mm Mini-MAMS (Multi-Axis Muzzle Stability) Brake $302.35
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  • KAC-Knight's Armament 5.56mm QDC 3 Prong Flash Hider, New Takeoff
    KAC-Knight's Armament 5.56mm QDC 3 Prong Flash Hider, New Takeoff $105.00 $85.00
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  • KAC-Knight's Armament 5.56mm QDC Flash Eliminator 3 Prong Flash Hider
    KAC-Knight's Armament 5.56mm QDC Flash Eliminator 3 Prong Flash Hider $105.00
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  • Black 6 Rib Panel
    KAC-Knight's Armament 6 Rib Handguard Panel, 3.90 Inch Length $22.60
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  • KAC-Knight's Armament 7.62 MAMS (Multi-Axis Muzzle Stability) Brake, 3/4-24 Thread
    KAC-Knight's Armament 7.62 MAMS (Multi-Axis Muzzle Stability) Brake, 3/4-24 Thread $403.15
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  • KAC-Knight's Armament 7.62mm MAMS (Malti-Axis Muzzle Stability) Muzzle Brake 5/8-24 Thread
    KAC-Knight's Armament 7.62mm MAMS (Malti-Axis Muzzle Stability) Muzzle Brake 5/8-24 Thread $403.15
    Out of stock
  • KAC-Knight's Armament 7.62mm QDC 3 Prong Flash Hider Kit, 3/4"-24 Thread
    KAC-Knight's Armament 7.62mm QDC 3 Prong Flash Hider Kit, 3/4"-24 Thread $204.90
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  • KAC-Knight's Armament 7.62mm QDC Flash Suppressor Kit Threaded 5/8-24
    KAC-Knight's Armament 7.62mm QDC Flash Suppressor Kit Threaded 5/8-24 $151.20
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  • KAC-Knight's Armament 7.62mm QDC Flash Suppressor Kit, 1/2"-28 Thread
    KAC-Knight's Armament 7.62mm QDC Flash Suppressor Kit, 1/2"-28 Thread $105.00
    Out of stock
  • KAC-Knight's Armament 7.62mm QDC Flash Suppressor Kit, 3/4"-24 Thread
    KAC-Knight's Armament 7.62mm QDC Flash Suppressor Kit, 3/4"-24 Thread $151.20
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  • KAC-Knight's Armament 9 Rib Handguard Panel, 5.48 Inch Length
    KAC-Knight's Armament 9 Rib Handguard Panel, 5.48 Inch Length $22.60
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  • KAC-Knight's Armament Locking Front Folding Sight, Fits SR15, SR16, M16, AR-15 With 0.750 Inch Barrel
    KAC-Knight's Armament Locking Front Folding Sight, Fits SR15, SR16, M16, AR-15 With 0.750 Inch Barrel $459.95
  • KAC-Knight's Armament Low Profile Gas Block, AR15 ID 0.750"
    KAC-Knight's Armament Low Profile Gas Block, AR15 ID 0.750" $109.29
    Out of stock
  • KAC-Knight's Armament M-110 Flash Suppressor, Includes Shim Kit
    KAC-Knight's Armament M-110 Flash Suppressor, Includes Shim Kit $163.80
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  • KAC-Knight's Armament M203 QD Mount, KAC
    KAC-Knight's Armament M203 QD Mount, KAC $399.99
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  • KAC-Knight's Armament Mid-Length Gas Tube For the SR-15 Mod 1, 13" Long
    KAC-Knight's Armament Mid-Length Gas Tube For the SR-15 Mod 1, 13" Long $57.08
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  • KAC-Knight's Armament QD Flash Hider
    KAC-Knight's Armament QD Flash Hider $97.02
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  • KAC-Knight's Armament SR-15E3 IWS Mod1 Upper Receiver Assembly
    KAC-Knight's Armament SR-15E3 IWS Mod1 Upper Receiver Assembly $1,500.00
    Out of stock
  • KAC-Knight's Armament SR-25 6.5 Creedmoor PR Mod 2 M-Lok Upper Receiver Kit, 22" Barrel
    KAC-Knight's Armament SR-25 6.5 Creedmoor PR Mod 2 M-Lok Upper Receiver Kit, 22" Barrel $3,780.00
    Out of stock
  • KAC-Knight's Armament SR-25 CC Mod 2 M-Lok Upper Receiver Kit, 14.5" Barrel
    KAC-Knight's Armament SR-25 CC Mod 2 M-Lok Upper Receiver Kit, 14.5" Barrel $3,500.00
    Out of stock
  • KAC-Knight's Armament SR-25 CC Mod 2 M-Lok Upper Receiver Kit, 16" Barrel
    KAC-Knight's Armament SR-25 CC Mod 2 M-Lok Upper Receiver Kit, 16" Barrel $3,500.00
    Out of stock
  • KAC-Knight's Armament SR-25 Ejection Port Cover Assembly, Extended
    KAC-Knight's Armament SR-25 Ejection Port Cover Assembly, Extended $30.71
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  • KAC-Knight's Armament SR-25 Ejection Port Pin
    KAC-Knight's Armament SR-25 Ejection Port Pin $14.60
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  • KAC-Knight's Armament SR-25 Ejector Spring
    KAC-Knight's Armament SR-25 Ejector Spring $6.54
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  • KAC-Knight's Armament SR-25 Extractor Buffer
    KAC-Knight's Armament SR-25 Extractor Buffer $7.84
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  • KAC-Knight's Armament SR-25 Extractor Spring
    KAC-Knight's Armament SR-25 Extractor Spring $5.23
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  • KAC-Knight's Armament SR-25 Firing Pin
    KAC-Knight's Armament SR-25 Firing Pin $62.36
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  • KAC-Knight's Armament SR-25 PC Mod 2 M-Lok Upper Receiver Kit, 16" Barrel
    KAC-Knight's Armament SR-25 PC Mod 2 M-Lok Upper Receiver Kit, 16" Barrel $3,500.00
    Out of stock
  • KAC-Knight's Armament SR-25 PR Mod 2 M-Lok Upper Receiver Kit, 20" Barrel
    KAC-Knight's Armament SR-25 PR Mod 2 M-Lok Upper Receiver Kit, 20" Barrel $3,500.00
    Out of stock
  • KAC-Knight's Armament SR-25 Shell Deflector
    KAC-Knight's Armament SR-25 Shell Deflector $121.60 $119.17
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  • KAC-Knight's Armament SR15/Pdw Triple Tap Muzzle Brake, Inconel
    KAC-Knight's Armament SR15/Pdw Triple Tap Muzzle Brake, Inconel $437.50
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