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Rifle Parts

Whether you're building a new rifle from scratch or looking to upgrade an existing firearm, our vast selection of rifle parts has everything you are going to need in that journey. At Rainier Arms' selection of rifle parts, you can find a wide variety of products including lower and upper parts, trigger parts, muzzle devices, and many more. 

Explore our selection of high-quality parts coming from various leading manufacturers like Strike Industries, Magpul, BCM, and many more.

Also, don't forget to check our specially-made Rainier Arms barrels for your firearms.

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Items 17-32 of 109

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  1. Battle Arms Development Complete Enhanced Lower Parts Kit
    Battle Arms Development Complete Enhanced Lower Parts Kit
    $125.00
    Out of stock
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  2. Aero Precision M4E1 Carbine Complete Lower Receiver w/ A2 Grip, No Stock - Black
    Aero Precision M4E1 Carbine Complete Lower Receiver w/ A2 Grip, No Stock - Black
    $294.99
    Out of stock
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  3. Faxon Firearms AR-15 G2 STREAMLINE Aluminum M-LOK Handguard
    Faxon Firearms AR-15 G2 STREAMLINE Aluminum M-LOK Handguard
    Out of stock
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  4. Nemo Arms Titanium Take Down Pin Set
    Nemo Arms Titanium Take Down Pin Set
    Out of stock
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  5. Aero Precision AR-15 M4E1 Stripped Lower Receiver - FDE
    Aero Precision AR-15 M4E1 Stripped Lower Receiver - FDE
    $159.99
    Out of stock
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  6. Aero Precision M4E1 Lower Receiver Special Edition: Freedom - Black
    Aero Precision M4E1 Lower Receiver Special Edition: Freedom - Black
    $154.99
    Out of stock
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  7. Grey Ghost Precision AR-15 M-LOK Handguard - 7.25"
    Grey Ghost Precision AR-15 M-LOK Handguard - 7.25"
    $162.24
    Out of stock
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  8. Aero Precision AR15 Gen 2 Carbine Complete Lower w/ A2 Grip, No Stock - Black
    Aero Precision AR15 Gen 2 Carbine Complete Lower w/ A2 Grip, No Stock - Black
    $274.99
    Out of stock
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  9. Aero Precision Upper Parts Kit
    Aero Precision Upper Parts Kit
    Out of stock
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  10. Aero Precision AR-15 Atlas R-ONE M-LOK Handguard - 15" FDE
    Aero Precision AR-15 Atlas R-ONE M-LOK Handguard - 15" FDE
    $219.99
    Out of stock
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  11. Bravo Company MFG QRF Quad Rail Handguard - 7"
    Bravo Company MFG QRF Quad Rail Handguard - 7"
    $206.95
    Out of stock
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  12. Aero Precision AR15 Lower Parts Kit Minus FCG, Trigger Guard, and Pistol Grip
    Aero Precision AR15 Lower Parts Kit Minus FCG, Trigger Guard, and Pistol Grip
    $40.00
    Out of stock
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  13. Battle Arms Development Workhorse AR-15 Stripped Forged Lower Receiver
    Battle Arms Development Workhorse AR-15 Stripped Forged Lower Receiver
    $125.00
    Out of stock
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  14. Aero Precision AR15 Atlas S-One Handguard 15" - FDE
    Aero Precision AR15 Atlas S-One Handguard 15" - FDE
    $219.99
    Out of stock
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  15. Bravo Company MFG (BCM) QRF Quad Rail Handguard - 12"
    Bravo Company MFG (BCM) QRF Quad Rail Handguard - 12"
    $224.95
    Out of stock
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  16. Hera Arms MPSS AR15 90/45 Degree Safety Selector Set
    Hera Arms MPSS AR15 90/45 Degree Safety Selector Set
    $29.90
    Out of stock
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Barrel Length
  1. 16" 5 items
  2. 18" 6 items
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  1. .223/5.56 1 item
  2. .45 ACP 1 item
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  4. 7.62x51 1 item
Category
  1. Receiver Parts 40 items
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  1. Anti Walk Pins 2 items
  2. AR-10 Handguard 1 item
  3. AR-15 Assembled Upper Receiver 2 items
  4. AR-15 Charging Handle 8 items
  5. AR-15 Complete Lower Receiver 8 items
  6. AR-15 Partial Upper Receiver 1 item
  7. AR-15 Handguard 21 items
  8. AR-15 Receiver Set 3 items
  9. AR-15 Stripped Lower Receiver 10 items
  10. AR-15 Stripped Upper Receiver 12 items
  11. Barrel 1 item
  12. Bolt 1 item
  13. Bolt Carrier Group 8 items
  14. Buffer Kit 2 items
  15. Buffer Tube 1 item
  16. Builders Kit 1 item
  17. Flash Hider 1 item
  18. Forearm Accesory 1 item
  19. Grip Module 1 item
  20. Handguard 3 items
  21. Lower Parts Kit 5 items
  22. Muzzle Brake 1 item
  23. Patch 1 item
  24. Safety Selector 1 item
  25. Silent Captured Spring 1 item
  26. Take Down / Pivot Pins 2 items
  27. Trigger 4 items
  28. Trigger Guard 1 item
  29. Upper Parts Kit 1 item
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  1. 4" 1 item
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  21. 15" 14 items
  22. 15.3" 2 items
  23. 17" 1 item
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  1. 9 Slot 9 items
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