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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. Spinta Precision AR-15 300BLK Cold Hammer Forged Barrel - 8" (Limited Production)
    Spinta Precision AR-15 300BLK Cold Hammer Forged Barrel - 8" (Limited Production)
    Special Price $149.99 Regular Price $199.99
  2. Sons of Liberty Gun Works M4-89 5.56 AR-15 Upper - 13.7"
    Sons of Liberty Gun Works M4-89 5.56 AR-15 Upper - 13.7"
    $950.00
  3. Huxwrx Muzzle Brake-QD 762 Suppressor Mount
    Huxwrx Muzzle Brake-QD 762 Suppressor Mount
  4. Huxwrx Flash Hider-QD 762 Suppressor Mount - 5/8x24
    Huxwrx Flash Hider-QD 762 Suppressor Mount - 5/8x24
    $142.00
  5. JMAC Customs 360 1/2-28 X37 HD HUB Suppressor Mount
    JMAC Customs 360 1/2-28 X37 HD HUB Suppressor Mount
    $116.96
  6. F5 MFG Modular Stock System for CZ Scorpion
    F5 MFG Modular Stock System for CZ Scorpion
  7. F5 MFG Modular Stock System for B&T APC9
    F5 MFG Modular Stock System for B&T APC9
  8. F5 MFG Modular Stock System for H&K MP5
    F5 MFG Modular Stock System for H&K MP5
  9. F5 MFG Modular Stock System for H&K MP5 .22LR
    F5 MFG Modular Stock System for H&K MP5 .22LR
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