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. JMAC Customs Metric Face Mount Shims
    JMAC Customs Metric Face Mount Shims
    $8.96
  2. Milspec/GI A2 Flash Hider - 1/2x28
    Milspec/GI A2 Flash Hider - 1/2x28
    $8.00
  3. AR15 Detent Takedown Spring
    AR15 Detent Takedown Spring
    $1.00
  4. AR15 Trigger Spring Kit
    AR15 Trigger Spring Kit
    $3.50
  5. Milspec/GI AR-15 Receiver End Plate
    Milspec/GI AR-15 Receiver End Plate
    $4.00
  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. Shooters Element CZ Scorpion EVO 3 S1 Reduced Weight Trigger Spring Kit
    Shooters Element CZ Scorpion EVO 3 S1 Reduced Weight Trigger Spring Kit
    $8.50
  9. TruCalibre AR-15 Enhanced Mag Button
    TruCalibre AR-15 Enhanced Mag Button
    $8.00
  10. Blitzkrieg Components AR-15 Universal A2 Front Sight Tool
    Blitzkrieg Components AR-15 Universal A2 Front Sight Tool
    $8.95
  11. Magpul MOE Enhanced Trigger Guard Polymer AR15/M4 - Black
    Magpul MOE Enhanced Trigger Guard Polymer AR15/M4 - Black
    $9.45
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