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. Lantac Dragon Muzzle Brake .223/556
    Lantac Dragon Muzzle Brake .223/556
    $128.99
  2. ERGO Enhanced SureGrip
    ERGO Enhanced SureGrip
  3. Battle Arms Development RACK AR-15 Ambi Charging Handle
    Battle Arms Development RACK AR-15 Ambi Charging Handle
    $79.99
  4. Elftmann Tactical AR-15 Non-Rotational Anti-Walk Pins
    Elftmann Tactical AR-15 Non-Rotational Anti-Walk Pins
    $19.95
  5. Brügger & Thomet (B&T) APC9 / APC45 Tailhook Adaptor
    Brügger & Thomet (B&T) APC9 / APC45 Tailhook Adaptor
    $89.00
  6. SIG SAUER MCX Rattler 300BLK Complete Upper - 5.5"
    SIG SAUER MCX Rattler 300BLK Complete Upper - 5.5"
    Special Price $1,759.99 Regular Price $1,999.99
  7. Armaspec SMB - Sound Mitigation Buffer - H Buffer
    Armaspec SMB - Sound Mitigation Buffer - H Buffer
    $44.99
  8. V Seven Weapon Systems Titanium Port Door Rod - AR15
    V Seven Weapon Systems Titanium Port Door Rod - AR15
    $21.34
  9. V Seven Harbinger .308 Stripped Upper Receiver
    V Seven Harbinger .308 Stripped Upper Receiver
    $392.85
  10. V Seven Weapon Systems Port Door Rod AR10
    V Seven Weapon Systems Port Door Rod AR10
    $13.58
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