raineirarms

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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15 Items

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  1. Griffin Armament Taper Mount Minimalist Blast Shield
    Griffin Armament Taper Mount Minimalist Blast Shield
    $84.95
  2. Griffin Armament M4SD Hammer Comp 5.56mm
    Griffin Armament M4SD Hammer Comp 5.56mm
    $89.95
  3. Griffin Armament GAS Ambi Safety Selector Kit
    Griffin Armament GAS Ambi Safety Selector Kit
    $38.00
  4. Griffin Armament EZ Brake .30Cal - 1/2x28
    Griffin Armament EZ Brake .30Cal - 1/2x28
    $79.95
  5. Griffin Armament EZ Brake .30 - 5/8x24
    Griffin Armament EZ Brake .30 - 5/8x24
    $79.95
  6. Griffin Armament EZ Brake .223/5.56 - 1/2x28
    Griffin Armament EZ Brake .223/5.56 - 1/2x28
    $79.95
  7. Griffin Armament M4SD Flash Comp 5.56mm
    Griffin Armament M4SD Flash Comp 5.56mm
    $94.95
  8. Griffin Armament C2E Contour Connect End Plate - QD
    Griffin Armament C2E Contour Connect End Plate - QD
    $17.00
  9. Griffin Armament QD Blast Shield-GEN2
    Griffin Armament QD Blast Shield-GEN2
    $185.25
  10. Griffin Armament Suppressor Optimized Buffer - Gen 2
    Griffin Armament Suppressor Optimized Buffer - Gen 2
    $52.00
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15 Items

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