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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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  1. Magpul SL Handguard - HK94/MP5
    Magpul SL Handguard - HK94/MP5
    $47.45
  2. Fortis MFG LA Stock Bundle Pack
    Fortis MFG LA Stock Bundle Pack
  3. Aero Precision Low Profile Adjustable Gas Block - .750
    Aero Precision Low Profile Adjustable Gas Block - .750
    $71.99
  4. Aero Precision AR15 Stripped Lower Receiver Gen 2 - FDE
    Aero Precision AR15 Stripped Lower Receiver Gen 2 - FDE
    $139.99
  5. Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-1
    Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-1
    $190.00
  6. Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-2
    Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-2
    $190.00
  7. Rise Armament AR-15 Lower Parts Kit
    Rise Armament AR-15 Lower Parts Kit
    $44.99
  8. Law Tactical Gen 3-M AR Folding Stock Adapter
    Law Tactical Gen 3-M AR Folding Stock Adapter
    $259.99
  9. Rainier Arms UltraMatch Billet Upper - MOD 3
    Rainier Arms UltraMatch Billet Upper - MOD 3
    $204.95
  10. Hiperfire HIPERTOUCH Reflex, AR15/10 Trigger Assembly
    Hiperfire HIPERTOUCH Reflex, AR15/10 Trigger Assembly
    $213.75
  11. Geissele Super Sabra Trigger Pack
    Geissele Super Sabra Trigger Pack
    $355.00
  12. Bravo Company MFG (BCM) Lower Group w/ Mod 0 Stock Black
    Bravo Company MFG (BCM) Lower Group w/ Mod 0 Stock Black
    $395.00
  13. Lantac UAR Upper Advanced Receiver inc CP-R360 Cam Pin
    Lantac UAR Upper Advanced Receiver inc CP-R360 Cam Pin
    $229.99
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