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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. A3 Tactical Angled Foregrip - CZ Scorpion Micro
    A3 Tactical Angled Foregrip - CZ Scorpion Micro
    $56.95
  2. A3 Tactical Angled Foregrip - IWI Uzi Pro
    A3 Tactical Angled Foregrip - IWI Uzi Pro
    $47.45
  3. Armaspec Sound Mitigation Buffer Gen 3
    Armaspec Sound Mitigation Buffer Gen 3
  4. Faxon Firearms AR-10 Height 3 Screw Gas Block - .875
    Faxon Firearms AR-10 Height 3 Screw Gas Block - .875
    $39.79
  5. WMD Guns AR-15 Forward Assist Assembly
    WMD Guns AR-15 Forward Assist Assembly
  6. WMD Guns .308 Lower Parts Kit Mod 3 - NiB-X/Nitromet
    WMD Guns .308 Lower Parts Kit Mod 3 - NiB-X/Nitromet
    $95.00
  7. Faxon Firearms 458 Socom/450 Bushmaster Bolt - Nitride
    Faxon Firearms 458 Socom/450 Bushmaster Bolt - Nitride
    $78.19
  8. Griffin Armament EZ Brake .30 - 5/8x24
    Griffin Armament EZ Brake .30 - 5/8x24
    $79.95
  9. Sons of Liberty Guns Works AR-15 Blaster Starter Kit
    Sons of Liberty Guns Works AR-15 Blaster Starter Kit
    $54.15
  10. Aeroknox Butterfly Brake .223/5.56
    Aeroknox Butterfly Brake .223/5.56
    $90.00
  11. Aeroknox Micro-Stop - M-Lok
    Aeroknox Micro-Stop - M-Lok
    $35.00
  12. Aeroknox Field Pins
    Aeroknox Field Pins
    $37.00
  13. Aeroknox Rail Grips - M-Lok
    Aeroknox Rail Grips - M-Lok
    $60.00
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