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. Lantac .223/5.56 E-BCG - TiN
    Lantac .223/5.56 E-BCG - TiN
    $305.99
  2. Lantac UAR Upper Advanced Receiver inc CP-R360 Cam Pin
    Lantac UAR Upper Advanced Receiver inc CP-R360 Cam Pin
    $229.99
  3. LANTAC E-BCG
    LANTAC E-BCG
    $261.99
  4. Lantac GB750-S Ultra Low Profile Gas Block
    Lantac GB750-S Ultra Low Profile Gas Block
    $62.99
  5. Lantac Dragon Muzzle Brake .223/556
    Lantac Dragon Muzzle Brake .223/556
    $128.99
  6. Lantac UFA-S Ultimate Forward Assist (Solid)
    Lantac UFA-S Ultimate Forward Assist (Solid)
    $38.99
  7. Lantac E-CT1 SINGLE STAGE TRIGGER
    Lantac E-CT1 SINGLE STAGE TRIGGER
  8. Lantac RPS END PLATE & CASTLE NUT
    Lantac RPS END PLATE & CASTLE NUT
    $54.99
  9. Lantac N15 Raven Billet Receiver Set
    Lantac N15 Raven Billet Receiver Set
    $458.99
  10. Lantac SF15 USR FORGED UPPER & LOWER SET
    Lantac SF15 USR FORGED UPPER & LOWER SET
    $305.98
  11. Lantac Enhanced 6MM ARC BCG Black Nitride
    Lantac Enhanced 6MM ARC BCG Black Nitride
    $288.99
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