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Parts & Kits

At Rainier Arms product selection you can find various rifle parts and kits that will help you build and maintain your firearms. Our selection of rifle parts and kits is carefully curated to ensure that we offer only the best products available.

We work with leading manufacturers on the market including V Seven Weapon Systems, Battle Arms Development, Strike Industries, and more.

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  1. White Label Armory AR-15 Lower Parts Kit - Complete
    $52.86
  2. White Label Armory AR-15 Lower Parts Kit - No Trigger Assembly
    $31.15
  3. Strike Industries AR MAGSTOP
    $8.95
  4. Rise Armament AR-15 Lower Parts Kit
    $44.99
  5. Forward Controls Design AR-15 ABC/R Augmented Bolt Catch/Release Non-Offset Upper Paddle - Dimpled
    $58.90
  6. Forward Controls Design AR-15 ABC/R Augmented Bolt Catch/Release Forward Biased Upper Paddle - Dimpled
    $58.90
  7. Forward Controls Design AR-15 ABC/R Augmented Bolt Catch/Release Rearward Biased Upper Paddle - Dimpled
    $58.90
  8. Tactical Springs (Sprinco) M4 Carbine Buffer Spring
    As low as $19.95
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  9. Tactical Springs (Sprinco) .308 Carbine Extra Power Buffer Spring - Orange
    $19.95
  10. Tactical Springs (Sprinco) M16/AR15 Rifle Length Standard Power Buffer Spring - Green
    $19.95
  11. JK Armament 155 Pistol Lite Booster/3 Lug Adapter
    As low as $37.80
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  12. B5 Systems Steel End Plate - Black
    $19.00
  13. Triggertech AR 45/90 Degree Safety Selector
    As low as $57.99
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  14. Aero Precision AR15 Standard Lower Parts Kit
    $95.00
  15. Sharps Bros AR-15 Lower Parts Kit W/O Fire Control Group & Grip
    $34.99
  16. Forward Controls Design Ambidextrous 90 Degree Safety Selector - Standard/Short Q Levers
    $78.85

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