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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. Sons of Liberty Gun Works Stripped Upper Receiver
    Sons of Liberty Gun Works Stripped Upper Receiver
    $142.50
  2. Sons of Liberty Guns Works AR-15 Blaster Starter Kit
    Sons of Liberty Guns Works AR-15 Blaster Starter Kit
    $54.15
  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. Aeroknox Butterfly Brake .223/5.56
    Aeroknox Butterfly Brake .223/5.56
    $90.00
  6. Aeroknox Micro-Stop - M-Lok
    Aeroknox Micro-Stop - M-Lok
    $35.00
  7. Aeroknox Field Pins
    Aeroknox Field Pins
    $37.00
  8. Aeroknox Rail Grips - M-Lok
    Aeroknox Rail Grips - M-Lok
    $60.00
  9. Radian Weapons ADAC-15 AR-15 Stripped Lower Receiver
    Radian Weapons ADAC-15 AR-15 Stripped Lower Receiver
    $514.95
  10. Griffin Armament EZ Brake .223/5.56 - 1/2x28
    Griffin Armament EZ Brake .223/5.56 - 1/2x28
    $79.95
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