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. JMAC Customs Metric Face Mount Shims
    JMAC Customs Metric Face Mount Shims
    $8.96
  2. AR15 Detent Takedown Spring
    AR15 Detent Takedown Spring
    $1.00
  3. AR15 Trigger Spring Kit
    AR15 Trigger Spring Kit
    $3.50
  4. Stag Arms A2 Pistol Grip
    Stag Arms A2 Pistol Grip
    $3.50
  5. Magpul MOE Rail Pieces 9 Slot - Black
    Magpul MOE Rail Pieces 9 Slot - Black
    $9.45
  6. AR15 Round Handguard Cap
    AR15 Round Handguard Cap
    $3.95
  7. Firing Pin Retainer 5.56
    Firing Pin Retainer 5.56
    $1.35
  8. TruCalibre AR-15 Enhanced Mag Button
    TruCalibre AR-15 Enhanced Mag Button
    $8.00
  9. Milspec/GI A2 Flash Hider - 1/2x28
    Milspec/GI A2 Flash Hider - 1/2x28
    $8.00
  10. Milspec/GI AR15 Forward Assist Assembly Kit
    Milspec/GI AR15 Forward Assist Assembly Kit
    $8.00
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15 Items

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