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    W/ BCG & CH
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  2. W/O BCG & CH 53 items
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  22. 24" 1 item
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Inventory
  1. In Stock 44 items
  2. Out of Stock 34 items
Customer Rating
  1. 5
    4 items
  2. 4
    & up     5 items
  3. 3
    & up     6 items
  4. 2
    & 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 Unassembled Upper Receiver Kit
    TacFire AR-15 .223 / 5.56 Unassembled Upper Receiver Kit
    $399.99 $264.99 $299.99 Save $135.00
  2. TacFire AR-10 .308 / 7.62x51mm Upper Receiver
    TacFire AR-10 .308 / 7.62x51mm Upper Receiver
    $499.99 $354.99 $369.99 Save $145.00
  3. TacFire AR-15 .223 / 5.56 Upper Receiver
    TacFire AR-15 .223 / 5.56 Upper Receiver
    (1)
    $299.99 $259.99 $299.99 Save $40.00
  4. TacFire AR-10 .308 / 7.62x51 Unassembled Rifle Kit w/ Lower Parts Kit without Forward Assist
    TacFire AR-10 .308 / 7.62x51 Unassembled Rifle Kit w/ Lower Parts Kit without Forward Assist
    $599.99 $404.99 Save $195.00
  5. TacFire AR-15 9mm Upper Receiver
    TacFire AR-15 9mm Upper Receiver
    $314.99 $259.99 $279.99 Save $55.00
  6. TacFire AR-15 .45 ACP Upper Receiver
    TacFire AR-15 .45 ACP Upper Receiver
    (1)
    $399.99 $279.99 $289.99 Save $120.00
  7. TacFire AR-10 6.5 Creedmoor Unassembled Rifle Kit w/ Lower Parts Kit
    TacFire AR-10 6.5 Creedmoor Unassembled Rifle Kit w/ Lower Parts Kit
    $799.99 $429.99 $529.99 Save $370.00
  10. TacFire AR-15 300 Blackout Unassembled Pistol Kit w/ Lower Parts Kit
    TacFire AR-15 300 Blackout Unassembled Pistol Kit w/ Lower Parts Kit
    (1)
    $359.99 $499.99 $309.99 $329.99 Save $170.00
  11. TacFire AR-15 9mm Unassembled Pistol Kit w/ Lower Parts Kit
    TacFire AR-15 9mm Unassembled Pistol Kit w/ Lower Parts Kit
    (1)
    $499.99 $279.99 $319.99 Save $220.00
  12. Panzer Arms AR57 ULT AR-15 Steel 5.7x28mm Upper Receiver w/ M-LOK Handguard
    Panzer Arms AR57 ULT AR-15 Steel 5.7x28mm Upper Receiver w/ M-LOK Handguard
    $644.99 $599.99 $619.99 Save $45.00
  13. TacFire AR-15 .300 Blackout Unassembled Upper Receiver Kit
    TacFire AR-15 .300 Blackout Unassembled Upper Receiver Kit
    $499.99 $259.99 $269.99 Save $240.00
  14. TacFire AR-10 .308 / 7.62x51mm Low Profile Unassembled Upper Receiver Kit
    TacFire AR-10 .308 / 7.62x51mm Low Profile Unassembled Upper Receiver Kit
    (1)
    $599.99 $374.99 Save $225.00
  15. TacFire AR-15 .45 ACP Unassembled Pistol Kit w/ Lower Parts Kit
    TacFire AR-15 .45 ACP Unassembled Pistol Kit w/ Lower Parts Kit
    $499.99 $309.99 $329.99 Save $190.00
  16. TacFire AR-10 .308 / 7.62x51 Upper Receiver without Forward Assist
    TacFire AR-10 .308 / 7.62x51 Upper Receiver without Forward Assist
    $599.99 $369.99 Save $230.00
  19. TacFire AR-15 9mm Unassembled Upper Receiver Kit
    TacFire AR-15 9mm Unassembled Upper Receiver Kit
    $399.99 $259.99 Save $140.00
  24. RISE Armament AR-15 18" SS 6mm ARC Assembled Upper Receiver with Free-Float 15" M-LOK Handguard
    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
  25. CMMG DISSENT Mk4 AR-15 10.5" CM 5.56MM Upper Receiver w/ 9.6" M-LOK Handguard
    CMMG DISSENT Mk4 AR-15 10.5" CM 5.56MM Upper Receiver w/ 9.6" M-LOK Handguard
    (1)
    $1,349.99 $1,399.99 $1,024.99 $1,035.99 Save $364.00
  26. TacFire AR-15 5" 7.62x39 Upper Receiver
    TacFire AR-15 5" 7.62x39 Upper Receiver
    Out of stock
    $349.99 $279.99 Save $70.00
  27. TacFire AR-10 .308 / 7.62x51 Unassembled Rifle Kit w/ Lower Parts Kit
    TacFire AR-10 .308 / 7.62x51 Unassembled Rifle Kit w/ Lower Parts Kit
    $699.99 $419.99 Save $280.00
  28. Battle Arms Development WORKHORSE Mod C AR-15 16" CMV 5.56 Upper Receiver w/ 15" M-LOK Handguard
    Battle Arms Development WORKHORSE Mod C AR-15 16" CMV 5.56 Upper Receiver w/ 15" M-LOK Handguard
    Out of stock
    $692.99 $659.99 Save $33.00
  29. TacFire AR-15 .45 ACP Unassembled Upper Receiver Kit
    TacFire AR-15 .45 ACP Unassembled Upper Receiver Kit
    $449.99 $269.99 $274.99 Save $180.00
  30. TacFire AR-15 .300 Blackout Upper Receiver
    TacFire AR-15 .300 Blackout Upper Receiver
    (2)
    $309.99 $399.99 $254.99 $299.99 Save $145.00
  31. Geissele Automatics Super Duty MOD1 AR-15 13.9" Pinned / 16" OAL 5.56 Upper Receiver with Free Float M-LOK Handguard
    Geissele Automatics Super Duty MOD1 AR-15 13.9" Pinned / 16" OAL 5.56 Upper Receiver with Free Float M-LOK Handguard
    Out of stock
    $1,325.99 $1,450.99
  35. Battle Arms Development Authority Elite AR-15 16" CMV 5.56 Upper Receiver w/ 15" M-LOK Handguard
    Battle Arms Development Authority Elite AR-15 16" CMV 5.56 Upper Receiver w/ 15" M-LOK Handguard
    $865.99 $824.99 Save $41.00
  36. FightLite MCR Dual-Feed AR-15 16.25" Assembled Upper Receiver
    FightLite MCR Dual-Feed AR-15 16.25" Assembled Upper Receiver
    Out of stock
    $6,399.99 $5,899.99 Save $500.00
  38. CMMG BANSHEE AR-15 5" CM 5.7x28 Upper Receiver w/ EML4 4" M-LOK Handguard
    CMMG BANSHEE AR-15 5" CM 5.7x28 Upper Receiver w/ EML4 4" M-LOK Handguard
    $899.99 $749.99 $834.99 Save $150.00
  39. CMMG BANSHEE Mk4 AR-15 4.5" CM .22 LR Upper Receiver w/ EML4 4" M-LOK Handguard
    CMMG BANSHEE Mk4 AR-15 4.5" CM .22 LR Upper Receiver w/ EML4 4" M-LOK Handguard
    $724.99 $589.99 $637.99 Save $135.00
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