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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. Maxim Defense SCW Pistol Brace - STD 3.3 oz Black
    Maxim Defense SCW Pistol Brace - STD 3.3 oz Black
    $494.96
  2. WOOX Wild Man Chassis - Dark Forest
    WOOX Wild Man Chassis - Dark Forest
  3. WMD Guns AR-15 Forward Assist Assembly
    WMD Guns AR-15 Forward Assist Assembly
  4. WMD Guns .308 Lower Parts Kit Mod 3 - NiB-X/Nitromet
    WMD Guns .308 Lower Parts Kit Mod 3 - NiB-X/Nitromet
    $95.00
  5. Faxon Firearms 458 Socom/450 Bushmaster Bolt - Nitride
    Faxon Firearms 458 Socom/450 Bushmaster Bolt - Nitride
    $78.19
  6. Tyrant Designs Mod V2 Pistol Grip
    Tyrant Designs Mod V2 Pistol Grip
  7. Griffin Armament EZ Brake .30 - 5/8x24
    Griffin Armament EZ Brake .30 - 5/8x24
    $79.95
  8. Sons of Liberty Gun Works Stripped Upper Receiver
    Sons of Liberty Gun Works Stripped Upper Receiver
    $142.50
  9. Sons of Liberty Guns Works AR-15 Blaster Starter Kit
    Sons of Liberty Guns Works AR-15 Blaster Starter Kit
    $54.15
  10. Gear Head Works Tailhook Mod 1 MP5K Folding Arm
    Gear Head Works Tailhook Mod 1 MP5K Folding Arm
    $141.70
  11. Midwest Industries Marlin M-Lok Handguard
    Midwest Industries Marlin M-Lok Handguard
    $178.95
  12. Aeroknox Butterfly Brake .223/5.56
    Aeroknox Butterfly Brake .223/5.56
    $90.00
  13. Aeroknox Micro-Stop - M-Lok
    Aeroknox Micro-Stop - M-Lok
    $35.00
  14. Aeroknox Field Pins
    Aeroknox Field Pins
    $37.00
  15. Aeroknox Rail Grips - M-Lok
    Aeroknox Rail Grips - M-Lok
    $60.00
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