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. Kinetic Development Group Kinect MLOK 7 Slot
    Kinetic Development Group Kinect MLOK 7 Slot
    $69.81
  2. Faxon Firearms 6.5 Grendel 9310 Bolt- Nitride
    Faxon Firearms 6.5 Grendel 9310 Bolt- Nitride
    $68.99
  3. Armaspec Gun Builder's Lower Parts Kit - Black
    Armaspec Gun Builder's Lower Parts Kit - Black
    $67.49
  4. Battle Arms Development Magazine Release Kit - EMR
    Battle Arms Development Magazine Release Kit - EMR
    $15.95
  5. Battle Arms Development Magazine Release Kit - EMMR
    Battle Arms Development Magazine Release Kit - EMMR
    $29.95
  6. Geissele Super Gas Block - Black
    Geissele Super Gas Block - Black
    $80.00
  7. Milspec/GI Carbine Buffer - 3.0oz
    Milspec/GI Carbine Buffer - 3.0oz
    $12.00
  8. Milspec/GI M16/Rifle Buffer Tube
    Milspec/GI M16/Rifle Buffer Tube
    $30.00
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