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. Rainier Arms Match 6mm ARC AR-15 Barrel - 12"
    Rainier Arms Match 6mm ARC AR-15 Barrel - 12"
    $260.00
  2. Daniel Defense AR-15 Bolt Carrier Group (BCG)
    Daniel Defense AR-15 Bolt Carrier Group (BCG)
    $228.00
  3. Faxon Firearms Big Gunner 8.6BLK AR-10/LR308 Barrel - 12"
    Faxon Firearms Big Gunner 8.6BLK AR-10/LR308 Barrel - 12"
    $219.88
  4. SLR Rifleworks AR-15 SLR-B15 Billet Upper Receivers
    SLR Rifleworks AR-15 SLR-B15 Billet Upper Receivers
    $249.00
  5. Law Tactical Gen 3-M AR Folding Stock Adapter
    Law Tactical Gen 3-M AR Folding Stock Adapter
    $259.99
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