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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. Tyrant Designs Mod V2 Pistol Grip
    Tyrant Designs Mod V2 Pistol Grip
  2. Sons of Liberty Gun Works Stripped Upper Receiver
    Sons of Liberty Gun Works Stripped Upper Receiver
    $142.50
  3. Gear Head Works Tailhook Mod 1 MP5K Folding Arm
    Gear Head Works Tailhook Mod 1 MP5K Folding Arm
    $141.70
  4. Midwest Industries Marlin M-Lok Handguard
    Midwest Industries Marlin M-Lok Handguard
    $178.95
  5. Aero Precision AR15 Stripped Lower Receiver Gen 2 - FDE
    Aero Precision AR15 Stripped Lower Receiver Gen 2 - FDE
    $139.99
  6. Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-1
    Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-1
    $190.00
  7. Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-2
    Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-2
    $190.00
  8. HiperFire PDI AR15/10 Drop In Trigger Assembly - BLK
    HiperFire PDI AR15/10 Drop In Trigger Assembly - BLK
    $171.00
  9. JP Enterprises Gen 2 Silent Captured Spring for AR-15
    JP Enterprises Gen 2 Silent Captured Spring for AR-15
    $132.95
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