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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. Aero Precision AR15 Enhanced Carbine Buffer Kit
    Aero Precision AR15 Enhanced Carbine Buffer Kit
    $76.99
    Out of stock
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  2. Rainier Arms Exclusive Spinta Precision AR-15 9mm Thermal Barrel - 5.25” Nitride (Rainier Arms Exclusive)
    Spinta Precision AR-15 9mm Thermal Barrel - 5.25” Nitride (Rainier Arms Exclusive)
    Special Price $77.99 Regular Price $149.99
    Out of stock
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  6. JP Enterprises Low Profile Adjustable Gas Block - .750
    JP Enterprises Low Profile Adjustable Gas Block - .750
    $75.95
    Out of stock
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  7. Aero Precision Low Profile Adjustable Gas Block - .625
    Aero Precision Low Profile Adjustable Gas Block - .625
    $71.99
    Out of stock
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  9. Silencerco ASR .30 Caliber Muzzle Brake- 1/2x28
    Silencerco ASR .30 Caliber Muzzle Brake- 1/2x28
    $79.90
    Out of stock
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  12. Arms Republic Grand Power Stribog Rail Extension
    Arms Republic Grand Power Stribog Rail Extension
    $75.95
    Out of stock
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  13. Armaspec AR-15 Victory Charging Handle - Black
    Armaspec AR-15 Victory Charging Handle - Black
    $71.99
    Out of stock
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  15. Griffin Armament EZ Brake .30Cal - 1/2x28
    Griffin Armament EZ Brake .30Cal - 1/2x28
    $79.95
    Out of stock
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Items 1-16 of 38

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Barrel Length
  1. 5.25" 1 item
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  5. Buffer Kit 1 item
  6. Castle Nut / End Plate 1 item
  7. Charging Handle 1 item
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  13. Muzzle Brake 11 items
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