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. Arms Republic 9mm Complete Upper Assembly - 16"
    Arms Republic 9mm Complete Upper Assembly - 16"
    $460.00
  2. JK Armament 155LT Compensator End Cap - 9MM
    JK Armament 155LT Compensator End Cap - 9MM
    $77.40
  3. Dead Foot Arms AR-15 AR-SD 9MM Upper Assembly
    Dead Foot Arms AR-15 AR-SD 9MM Upper Assembly
  4. Noveske 3 Lug Adapter 1/2X28
    Noveske 3 Lug Adapter 1/2X28
    $71.25
  5. Angstadt Arms 16″ 9mm Complete Upper Assembly
    Angstadt Arms 16″ 9mm Complete Upper Assembly
    $629.00
  6. Huxwrx 9MM 3-Lug Housing Adapter
    Huxwrx 9MM 3-Lug Housing Adapter
    $112.00
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Items 17-23 of 23

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