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 SR25 Flash Suppressor Shim Kit, For 3/4"-24
    KAC-Knight's Armament SR25 Flash Suppressor Shim Kit, For 3/4"-24 $36.02
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  • KAC-Knights Armament SR15 Field Repair Kit, New Style
    KAC-Knights Armament SR15 Field Repair Kit, New Style $139.86
    Out of stock
  • Kinetic Development SCARGING HANDLE – SCAR AMBI CHARGING HANDLE (SCP5-020)
    Kinetic Development SCARGING HANDLE – SCAR AMBI CHARGING HANDLE $49.00 $45.57
    Add To Cart
  • Knight's Armament  SR-16 CQB Gov’t Spec Upper
    Knight's Armament SR-16 CQB Gov’t Spec Upper $1,470.00
  • Knight's Armament  SR-30 9.5" .300 Blackout M-LOK Upper Receiver
    Knight's Armament SR-30 9.5" .300 Blackout M-LOK Upper Receiver $1,833.44
    Out of stock
  • Knight's Armament 5.56 M4QD MAMS Muzzle Brake Kit, 1/2"-28 QDSS-NT4 Compatible Suppressor Mount
    Knight's Armament 5.56 M4QD MAMS Muzzle Brake Kit, 1/2"-28 QDSS-NT4 Compatible Suppressor Mount $201.56
    Out of stock
  • Knight's Armament 5.56mm Muzzle Device Shim Set
    Knight's Armament 5.56mm Muzzle Device Shim Set $17.64
    Add To Cart
  • Knight's Armament 7.62mm Muzzle Device Shim Kit
    Knight's Armament 7.62mm Shim Set, For 3/4"-24 KAC Muzzle Devices $29.46
    Add To Cart
  • Knight's Armament AR-10/SR-25 AMBI Charging Handle
    Knight's Armament AR-10/SR-25 AMBI Charging Handle $226.80
    Add To Cart
  • 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 AMBI MAG RELEASE ROLL PIN $2.99
    Add To Cart
  • KNIGHT'S ARMAMENT SR-15 BOLT CATCH ROLL PIN $5.56
    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
    Out of stock
  • 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
    Out of stock
  • 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
    Add To Cart
  • 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
    Out of stock
  • 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 GAS TUBE ROLL PIN $3.69
    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 AMBI MAG RELEASE ROLL PIN $4.12
    Add To Cart
  • Knight's Armament SR-25 Cam Pin
    Knight's Armament SR-25 Cam Pin $39.99
    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
    Out of stock
  • 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
    Out of stock
  • 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/M-110 GAS TUBE ROLL PIN $4.12
    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
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