AR-15 Upper Receiver Parts

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  • Knight's Armament SR-15 Mod 2 Gas Block Castle Nut
    Knight's Armament SR-15 Mod 2 Gas Block Castle Nut $57.13
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  • 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
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  • 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
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  • 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
    Out of stock
  • 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
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  • 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
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  • Knight's Armament SR-25 Cam Pin
    Knight's Armament SR-25 Cam Pin $39.99
    Out of stock
  • Knight's Armament SR-25 Carbine RAS 10"
    Knight's Armament SR-25 Carbine RAS 10" $431.25
    Out of stock
  • Knight's Armament SR-25 Field Repair Kit For E2 Bolt
    Knight's Armament SR-25 Field Repair Kit For E2 Bolt $282.44
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  • Knight's Armament SR-25 Gas Block Coiled Spring Pin
    Knight's Armament SR-25 Gas Block Coiled Spring Pin $7.84 $7.68
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  • Knight's Armament SR-25 Gas Block Suppressor Locating Pin
    Knight's Armament SR-25 Gas Block Suppressor Locating Pin $16.07 $15.75
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  • 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
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  • 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
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  • KNIGHT'S ARMAMENT SR-25/M-110 GAS TUBE ROLL PIN $4.12
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  • 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
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  • 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 Standard Flip-Up Front Sight Pivot Pin C-Clip
    Knight's Armament Standard Flip-Up Front Sight Pivot Pin C-Clip $4.99
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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
    Out of stock
  • Knight's Armament URX 2 & URX 3 Front Sight Locking Block
    Knight's Armament URX 2 & URX 3 Front Sight Locking Block $14.65 $14.36
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  • Knight's Armament URX 2 & URX 3 Front Sight Push Button
    Knight's Armament URX 2 & URX 3 Front Sight Push Button $9.18 $9.00
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  • Knight's Armament URX 2 & URX 3 Front Sight Spring
    Knight's Armament URX 2 & URX 3 Front Sight Spring $7.19 $7.05
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  • Knight's Armament URX 2 & URX 3 Replacement Front Sight Elevation Knob (25347)
    Knight's Armament URX 2 & URX 3 Replacement Front Sight Elevation Knob $5.98 $5.86
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  • Knight's Armament URX 2 & URX 3 Replacement Front Sight Leaf, Black
    Knight's Armament URX 2 & URX 3 Replacement Front Sight Leaf, Black $67.95
    Out of stock
  • Knight's Armament URX 2 & URX 3 Replacement Front Sight Post (20413)
    Knight's Armament URX 2 & URX 3 Replacement Front Sight Post $14.93
    Out of stock
  • Knight's Armament URX 2 & URX 3 Replacement Handguard Screw
    Knight's Armament URX 2 & URX 3 Replacement Handguard Screw $3.42 $3.35
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  • Knight's Armament URX 3 & 3.1 Panel Kit/Rail Section Spare Screw
    Knight's Armament URX 3 & 3.1 Panel Kit/Rail Section Spare Screw $3.16 $3.06
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  • Knight's Armament URX 3 & 3.1 Panel Kit/Rail Section/Handstop Spare Nut
    Knight's Armament URX 3 & 3.1 Panel Kit/Rail Section/Handstop Spare Nut $3.13 $2.97
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  • Knight's Armament URX 4 Spare Shim Kit
    Knight's Armament URX 4 IBN Rail Spare Shim Kit $14.62 $13.89
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  • KNIGHT'S ARMAMENT URX II FRONT SIGHT BUTTON ROLL PIN $4.31
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  • Knight's Armament URX III & 3.1 Hand Stop
    Knight's Armament URX III & 3.1 Hand Stop $59.80 $58.00
    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
    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
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  • 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
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