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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. Next Level Armament NLX-HS M-LOK Handstop
    Next Level Armament NLX-HS M-LOK Handstop
    $29.00
  2. Rainier Arms RUC DI 300BLK Partial Upper Receiver - 10.7"
    Rainier Arms RUC DI 300BLK Partial Upper Receiver - 10.7"
    Special Price $400.00 Regular Price $500.00
  3. Midwest Industries AK Alpha Series M-LOK Handguard - 10"
    Midwest Industries AK Alpha Series M-LOK Handguard - 10"
    $219.95
  4. Kinetic Development Group Kinect MLOK 7 Slot
    Kinetic Development Group Kinect MLOK 7 Slot
    $69.81
  5. AeroKnox Hook-Stop MLOK
    AeroKnox Hook-Stop MLOK
    $42.50
  6. Bravo Company MFG (BCM) Gunfighter AR-15 MCMR Rail - 7"
    Bravo Company MFG (BCM) Gunfighter AR-15 MCMR Rail - 7"
    $206.95
  7. Bravo Company MFG (BCM) Gunfighter AR-15 MCMR Rail - 15"
    Bravo Company MFG (BCM) Gunfighter AR-15 MCMR Rail - 15"
    $234.95
  8. Geissele MK14 AR-15 Super Modular Rail
    Geissele MK14 AR-15 Super Modular Rail
  9. Aeroknox AX // 15 Handguard M-LOK
    Aeroknox AX // 15 Handguard M-LOK
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