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Customer Rating
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    4 items
  2. 3
    & up     7 items
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    & up     8 items

Gun Parts

Whether you’re looking for a quality trigger upgrade for your Glock® pistol or AR-style carbine, an ergonomic pistol grip for your sporting rifle, drop-in magwell upgrade, or an ergonomic pistol brace, we at GunMag Warehouse offer a wide selection of gun parts and upgrades from top-selling brands like SB Tactical®, Magpul®, Tyrant Designs®, Sig Sauer®, and more. Shop our full collection of gun parts today!

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  1. TacFire AR-15 .223 / 5.56 Upper Receiver - 14.5"
    TacFire AR-15 .223 / 5.56 Upper Receiver
    (1)
    $299.99 $259.99 $299.99 Save $40.00
  2. TacFire AR-15 9mm Upper Receiver - 10"
    TacFire AR-15 9mm Upper Receiver
    (1)
    $314.99 $259.99 $279.99 Save $55.00
  3. TacFire AR-15 .45 ACP Unassembled Upper Receiver Kit - 4"
    TacFire AR-15 .45 ACP Unassembled Upper Receiver Kit
    $449.99 $269.99 $274.99 Save $180.00
  4. TacFire AR-15 .223 / 5.56 Unassembled Upper Receiver Kit- 5"
    TacFire AR-15 .223 / 5.56 Unassembled Upper Receiver Kit
    (1)
    $399.99 $264.99 $299.99 Save $135.00
  5. TacFire AR-10 .308 / 7.62x51 Unassembled Rifle Kit w/ Lower Parts Kit - 16"
    TacFire AR-10 .308 / 7.62x51 Unassembled Rifle Kit w/ Lower Parts Kit
    (1)
    $699.99 $419.99 Save $280.00
  6. TacFire AR-10 .308 / 7.62x51mm Upper Receiver - 10"
    TacFire AR-10 .308 / 7.62x51mm Upper Receiver
    $499.99 $354.99 $369.99 Save $145.00
  7. TacFire AR-15 .45 ACP Unassembled Pistol Kit w/ Lower Parts Kit - 10"
    TacFire AR-15 .45 ACP Unassembled Pistol Kit w/ Lower Parts Kit
    $499.99 $309.99 $329.99 Save $190.00
  9. FightLite MCR Dual-Feed AR-15 16.25" Assembled Upper Receiver
    FightLite MCR Dual-Feed AR-15 16.25" Assembled Upper Receiver
    $6,399.99 $5,899.99 Save $500.00
  10. RISE Armament AR-15 18" SS 22 ARC Assembled Upper Receiver with Free Float 15" M-LOK Handguard - BLK
    RISE Armament AR-15 18" SS 22 ARC Assembled Upper Receiver with Free Float 15" M-LOK Handguard
    $1,199.99 $999.99 Save $200.00
  11. RISE Armament AR-15 18" SS 6mm ARC Assembled Upper Receiver with Free Float 15" M-LOK Handguard - BLK
    RISE Armament AR-15 18" SS 6mm ARC Assembled Upper Receiver with Free-Float 15" M-LOK Handguard
    $1,199.99 $999.99 Save $200.00
  12. TacFire AR-15 9mm Unassembled Upper Receiver Kit - 4"
    TacFire AR-15 9mm Unassembled Upper Receiver Kit
    $399.99 $259.99 Save $140.00
  14. TacFire AR-15 .300 Blackout Upper Receiver - 10"
    TacFire AR-15 .300 Blackout Upper Receiver
    (2)
    $309.99 $399.99 $254.99 $299.99 Save $145.00
  15. TacFire AR-15 .45 ACP Upper Receiver - 10"
    TacFire AR-15 .45 ACP Upper Receiver
    (2)
    $399.99 $279.99 $289.99 Save $120.00
  17. TacFire AR-15 9mm Unassembled Pistol Kit w/ Lower Parts Kit- 10"
    TacFire AR-15 9mm Unassembled Pistol Kit w/ Lower Parts Kit
    (1)
    $499.99 $279.99 $319.99 Save $220.00
  18. TacFire AR-15 .223 / 5.56 Unassembled Pistol Kit w/ Lower Parts Kit - 10.5"
    TacFire AR-15 .223 / 5.56 Unassembled Pistol Kit w/ Lower Parts Kit
    $399.99 $279.99 $349.99 Save $120.00
  19. TacFire AR-15 300 Blackout Unassembled Pistol Kit w/ Lower Parts Kit - 10.5"
    TacFire AR-15 300 Blackout Unassembled Pistol Kit w/ Lower Parts Kit
    (1)
    $359.99 $499.99 $309.99 $329.99 Save $170.00
  20. TacFire AR-10 308 / 7.62x51 Upper Receiver without Forward Assist - 16"
    TacFire AR-10 .308 / 7.62x51 Upper Receiver without Forward Assist
    $599.99 $369.99 Save $230.00
  24. Battle Arms Development Authority Elite Mod C AR-15 16" CMV 5.56 Upper Receiver w/ 15" M-LOK Handguard - Black
    Battle Arms Development Authority Elite Mod C AR-15 16" CMV 5.56 Upper Receiver w/ 15" M-LOK Handguard
    $865.99 $824.99 Save $41.00
  25. Battle Arms Development WORKHORSE AR-15 16" CMV 5.56 Upper Receiver w/ 15" M-LOK Handguard - Black
    Battle Arms Development WORKHORSE AR-15 16" CMV 5.56 Upper Receiver w/ 15" M-LOK Handguard
    $724.99 $692.99 Save $32.00
  26. Battle Arms Development WORKHORSE Mod C AR-15 16" CMV 5.56 Upper Receiver w/ 15" M-LOK Handguard - Black
    Battle Arms Development WORKHORSE Mod C AR-15 16" CMV 5.56 Upper Receiver w/ 15" M-LOK Handguard
    $692.99 $659.99 Save $33.00
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