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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  1. Geissele MK14 AR-15 Super Modular Rail
    Geissele MK14 AR-15 Super Modular Rail
  2. Arms Republic RS AR-15 M-LOK Handguard
    Arms Republic RS AR-15 M-LOK Handguard
  3. Arms Republic 9mm Complete Upper Assembly - 16"
    Arms Republic 9mm Complete Upper Assembly - 16"
    $460.00
  4. Midwest Industries MCX Virtus M-LOK Handguard
    Midwest Industries MCX Virtus M-LOK Handguard
  5. Noveske N4 Recon Gen 4 5.56 NATO Complete Upper - 16" Black
    Noveske N4 Recon Gen 4 5.56 NATO Complete Upper - 16" Black
    $1,496.25
  6. Noveske AR-15 N4 5.56 NATO SPR Upper - 18"
    Noveske AR-15 N4 5.56 NATO SPR Upper - 18"
    $1,543.75
  7. Sharps Bros Hellbreaker AR-15 Builders Kit - 15"
    Sharps Bros Hellbreaker AR-15 Builders Kit - 15"
    Special Price $399.99 Regular Price $600.00
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