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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. Griffin Armament M4SD Flash Comp 5.56mm
    Griffin Armament M4SD Flash Comp 5.56mm
    $94.95
  2. Hiperfire EDT Heavy Gunner, AR15/10 Trigger Assembly
    Hiperfire EDT Heavy Gunner, AR15/10 Trigger Assembly
    $94.05
  3. Precision Armament M4-72 AK-47 Severe-Duty Compensator
    Precision Armament M4-72 AK-47 Severe-Duty Compensator
    $94.99
  4. JK Armament 155LT Quick Attach Taper Mount
    JK Armament 155LT Quick Attach Taper Mount
    $90.00
  5. R&D Precision 9mm PW9 AR-15 Barrel - 7.25"
    R&D Precision 9mm PW9 AR-15 Barrel - 7.25"
    $99.99
  6. AeroKnox Orion AR Grip
    AeroKnox Orion AR Grip
    $90.00
  7. Faxon Firearms Stripped Forged Upper Receiver - 7075-T6
    Faxon Firearms Stripped Forged Upper Receiver - 7075-T6
    $91.99
  8. Bravo Company MFG (BCM) Extended M3 5.56 Compensator
    Bravo Company MFG (BCM) Extended M3 5.56 Compensator
    $94.95
  9. JK Armament 155 HD Thread Mount - 1/2x28
    JK Armament 155 HD Thread Mount - 1/2x28
    $90.00
  10. Hiperfire Xtreme AK Mark-3 Trigger
    Hiperfire Xtreme AK Mark-3 Trigger
    $95.25
  11. Q LLC Cherry Bomb Muzzle Brake 8.6BLK - M18-1.5
    Q LLC Cherry Bomb Muzzle Brake 8.6BLK - M18-1.5
    $90.00
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