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. Sig Sauer TREAD Vertical M-LOK Grip Kit
    Sig Sauer TREAD Vertical M-LOK Grip Kit
    Special Price $37.99 Regular Price $49.99
  2. Aeroknox AX // Foregrip - M-LOK
    Aeroknox AX // Foregrip - M-LOK
    $50.00
  3. Battle Arms Development M-Lok Micro Handstop
    Battle Arms Development M-Lok Micro Handstop
    $14.99
  4. Ergo M-Lok Enhanced Angle Grip
    Ergo M-Lok Enhanced Angle Grip
    $40.00
  5. Ergo M-Lok Hand Stop / Barricade Stop - Black
    Ergo M-Lok Hand Stop / Barricade Stop - Black
    $40.00
  6. ERGO 4 Slot M-LOK Slot Cover 4 Pack
    ERGO 4 Slot M-LOK Slot Cover 4 Pack
  7. Fortis MFG Shift Fore-End Vertical Grip M-LOK
    Fortis MFG Shift Fore-End Vertical Grip M-LOK
    $56.95
  8. Magpul Rail Cover M-LOK Type 1
    Magpul Rail Cover M-LOK Type 1
  9. Magpul M-LOK Aluminum Rail Section
    Magpul M-LOK Aluminum Rail Section
  10. SLR M-LOK RAIL SECTION
    SLR M-LOK RAIL SECTION
  11. Next Level Armament NLX-HS M-LOK Handstop
    Next Level Armament NLX-HS M-LOK Handstop
    $29.00
  12. Kinetic Development Group Kinect MLOK 7 Slot
    Kinetic Development Group Kinect MLOK 7 Slot
    $69.81
  13. AeroKnox Hook-Stop MLOK
    AeroKnox Hook-Stop MLOK
    $42.50
  14. Kratos Design Group Tenderizer M-LOK Barricade Stop
    Kratos Design Group Tenderizer M-LOK Barricade Stop
    $63.95
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