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 AR-15/SR-15 AMBI Charging Handle
    Knight's Armament AR-15/SR-15 AMBI Charging Handle $151.20
    Out of stock
  • Knight's Armament Mid-Length Gas Tube For the SR-15 Mod 2 CQB
    Knight's Armament Gas Tube For the SR-15 11.5" CQB Mod 2, 8 7/16" Long $43.38 $42.51
    Add To Cart
  • Knight's Armament Mid-Length Gas Tube For the SR-15 Mod 2
    Knight's Armament Mid-Length Gas Tube For the SR-15 14.5"/16" Mod 2, 11 7/8" Long Long $43.38 $42.51
    Add To Cart
  • Knight's Armament SR-15 Carbine Mod 2 M-Lok Upper Receiver Assembly, 14.5"
    Knight's Armament SR-15 Carbine Mod 2 M-Lok Upper Receiver Assembly, 14.5" $1,776.60
    Out of stock
  • Knight's Armament SR-15 Carbine Mod 2 Upper Receiver Assembly, 14.5"
    Knight's Armament SR-15 Carbine Mod 2 Upper Receiver Assembly-Keymod, 14.5" $1,776.60
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  • Knight's Armament SR-15 E3 11.5" CQB Mod 2 SBR M-Lok Upper Receiver Assy
    Knight's Armament SR-15 E3 11.5" CQB Mod 2 SBR M-Lok Upper Receiver Assy $1,776.60
    Add To Cart
  • Knight's Armament SR-15 E3 11.5" CQB Mod 2 SBR Upper Receiver Assy, URX 4
    Knight's Armament SR-15 E3 11.5" CQB Mod 2 SBR Upper Receiver Assy, URX 4 $1,776.60
    Out of stock
  • Knight's Armament SR-15 E3 Bolt Extractor, Dimpled
    Knight's Armament SR-15 E3 Bolt Extractor, Dimpled $54.51 $51.95
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  • Knight's Armament SR-15 E3 CQB SBR Mod 1 Upper Receiver Assy
    Knight's Armament SR-15 E3 CQB SBR Mod 1 Upper Receiver Assy $1,750.00
  • Knight's Armament SR-15 Firing Pin Retainer
    Knight's Armament SR-15 Firing Pin Retainer $3.61
    Add To Cart
  • Knight's Armament SR-15 Gas Block Taper Pin
    Knight's Armament SR-15 Gas Block Taper Pin $3.08 $3.02
    Add To Cart
  • Knight's Armament SR-15 Mod 2 Gas Block Castle Nut
    Knight's Armament SR-15 Mod 2 Gas Block Castle Nut $57.13
    Add To Cart
  • Knight's Armament SR-15 Mod 2 Gas Tube Nut, AN Fitting Style
    Knight's Armament SR-15 Mod 2 Gas Tube Nut, AN Fitting Style $37.10 $36.36
    Add To Cart
  • Knight's Armament SR-15 Mod 2 Gas Tube Sleeve, AN Fitting Style
    Knight's Armament SR-15 Mod 2 Gas Tube Sleeve, AN Fitting Style $19.94 $19.54
    Add To Cart
  • Knight's Armament SR-15 MOD 2 Upper Receiver, 16" Barrel, URX 4, M-LOK
    Knight's Armament SR-15 MOD 2 Upper Receiver, 16" Barrel, URX 4, M-LOK $1,713.60
    Add To Cart
  • Knight's Armament SR-15E3 IWS Mod 2 Upper Receiver Assembly, 16"
    Knight's Armament SR-15E3 IWS Mod 2 Keymod Upper Receiver Assembly, 16" $1,713.60
    Add To Cart
  • Knight's Armament SR-15E3 LPR Upper Receiver Assy.
    Knight's Armament SR-15E3 LPR Upper Receiver Assy. $1,750.00 $1,729.95
    Out of stock
  • Knight's Armament SR-25 Cam Pin
    Knight's Armament SR-25 Cam Pin $32.99
    Add To Cart
  • Knight's Armament SR-25 Field Repair Kit For E2 Bolt
    Knight's Armament SR-25 Field Repair Kit For E2 Bolt $282.44
    Add To Cart
  • Knight's Armament SR-25 Gas Block Coiled Spring Pin
    Knight's Armament SR-25 Gas Block Coiled Spring Pin $7.84 $7.68
    Add To Cart
  • Knight's Armament SR-25 Gas Block Suppressor Locating Pin
    Knight's Armament SR-25 Gas Block Suppressor Locating Pin $16.07 $15.75
    Add To Cart
  • Knight's Armament SR-25 Gas Block Taper Pin, #0 x 3/4"
    Knight's Armament SR-25 Gas Block Taper Pin, #0 x 3/4" $4.31 $4.22
    Add To Cart
  • Knight's Armament SR-25 Mod 2 Gas Block Castle Nut
    Knight's Armament SR-25 Mod 2 Gas Block Castle Nut $42.85 $41.99
    Add To Cart
  • Knight's Armament SR-25/M110 Double High Picatinny Gas Block
    Knight's Armament SR-25/M110 Double High Picatinny Gas Block, 0.750" $399.00
    Out of stock
  • Knight's Armament E3 Bolt Spare Extractor Spring, Heavy Duty
    Knight's Armament SR15 E3 Bolt Extractor Spring, Heavy Duty $3.69 $3.51
    Add To Cart
  • Knight's Armament E3 Bolt Spare Extractor Spring, Standard Weight
    Knight's Armament SR15 E3 Bolt Extractor Spring, Standard Weight $3.49
  • 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
    Out of stock
  • 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
    Add To Cart
  • 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
    Add To Cart
  • 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
    Add To Cart
  • 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
    Add To Cart
  • 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 $329.18
    Add To Cart
  • 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
    Add To Cart
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