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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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Items 65-80 of 86

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  1. Stern Defense SD BU9 Echo 9mm Bolt Carrier Group For Glock/Colt - NiB
    Stern Defense SD BU9 Echo 9mm Bolt Carrier Group For Glock/Colt - NiB
    $169.99
    Out of stock
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  2. Ballistic Advantage 5.5" 9MM AR 15 Barrel CrMoV
    Ballistic Advantage 5.5" 9MM AR 15 Barrel CrMoV
    $99.75
    Out of stock
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  3. Rainier Arms UltraMatch MOD2 9mm AR-15 Barrel - 16" Polished
    Rainier Arms UltraMatch MOD2 9mm AR-15 Barrel - 16" Polished
    $209.00
    Out of stock
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  4. Faxon Firearms Tapered AR-15 9MM Barrel w/ Integral Muzzle Brake - 16"
    Faxon Firearms Tapered AR-15 9MM Barrel w/ Integral Muzzle Brake - 16"
    $202.40
    Out of stock
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  5. Angstadt Arms 9mm 3-Lug Adapter Dual Chevron Brake - 1/2x28
    Angstadt Arms 9mm 3-Lug Adapter Dual Chevron Brake - 1/2x28
    $54.00
    Out of stock
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  6. Angstadt Arms 9mm 3-Lug Adapter A1 Style Flash Hider - 1/2x28
    Angstadt Arms 9mm 3-Lug Adapter A1 Style Flash Hider - 1/2x28
    $54.00
    Out of stock
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  7. Faxon Firearms AR-15 9mm FX916-U Complete Upper -16"
    Faxon Firearms AR-15 9mm FX916-U Complete Upper -16"
    $506.60
    Out of stock
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  8. Stern Defense AR 9mm MOD5 MLOK Complete Upper - 10.5"
    Stern Defense AR 9mm MOD5 MLOK Complete Upper - 10.5"
    $539.99
    Out of stock
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  9. Rainier Arms 9MM Glock/Colt Compatible Precision Match Grade Bolt Carrier Group (BCG)
    Rainier Arms 9MM Glock/Colt Compatible Precision Match Grade Bolt Carrier Group (BCG)
    Out of stock
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  10. JP Enterprises PSC-17 Completion Dual-Charge Upper Receiver Assembly w/ Radian Raptor LT - Black
    JP Enterprises PSC-17 Completion Dual-Charge Upper Receiver Assembly w/ Radian Raptor LT - Black
    $793.25
    Out of stock
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  11. Angstadt Arms 9mm AR-15 Barrel - 6"
    Angstadt Arms 9mm AR-15 Barrel - 6"
    $108.00
    Out of stock
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  12. Sig Sauer MPX G2 9mm Barrel - 8"
    Sig Sauer MPX G2 9mm Barrel - 8"
    Special Price $639.99 Regular Price $699.99
    Out of stock
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  13. Arms Republic 9mm Complete Upper Assembly - 16"
    Arms Republic 9mm Complete Upper Assembly - 16"
    $460.00
    Out of stock
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  14. R&D Precision 9mm PW9-R Bufferless Upper Kit – 16"
    R&D Precision 9mm PW9-R Bufferless Upper Kit – 16"
    $649.99
    Out of stock
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  15. Matador Arms MAT-9 9MM Blowback Upper Receiver
    Matador Arms MAT-9 9MM Blowback Upper Receiver
    Out of stock
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  16. Silencerco ASR Single Port Muzzle Brake 9mm Caliber - 1/2x28
    Silencerco ASR Single Port Muzzle Brake 9mm Caliber - 1/2x28
    $79.90
    Out of stock
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Items 65-80 of 86

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  1. 3.1" 1 item
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  1. Receiver Parts 21 items
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Is Firearms?
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  2. Angstadt Arms 6 items
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  17. JP Enterprises Inc 2 items
  18. Kaw Valley Precision 1 item
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  20. Matador Arms 1 item
  21. MCM Firearms 1 item
  22. Next Level Armament 2 items
  23. Noveske 1 item
  24. Precision Armament 1 item
  25. Q, LLC 1 item
  26. Quarter Circle 10 5 items
  27. R&D Precision 4 items
  28. Rainier Arms, LLC 17 items
  29. Shooting Innovations 2 items
  30. Sig Sauer 1 item
  31. Silencerco 1 item
  32. Spinta Precision 3 items
  33. Stern Defense 4 items
  34. Tyrant Designs 1 item
Mount
  1. M-LOK 4 items
  2. Picatinny 4 items
Optic Footprint
  1. Aimpoint Acro 1 item
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  1. AR-9 2 items
  2. AR-15 4 items
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  2. AR-15 20 items
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  1. $0.00 - $999.99 82 items
  2. $1,000.00 - $1,999.99 3 items
  3. $2,000.00 and above 1 item
Product Type
  1. AR-15 Barrel 20 items
  2. AR-15 Complete Upper Receiver 4 items
  3. AR-15 Receiver Set 1 item
  4. AR-9 Partial Upper Receiver 1 item
  5. AR-9 Receiver Set 1 item
  6. AR-9 Upper Receiver 7 items
  7. Barrel 14 items
  8. Bolt Carrier Group 5 items
  9. Brace 1 item
  10. Chassis 1 item
  11. Compensator 1 item
  12. Complete Upper 6 items
  13. End Cap 3 items
  14. Flash Hider 5 items
  15. Muzzle Brake 7 items
  16. Muzzle Device Accessory 3 items
  17. Parts Kit 3 items
  18. Pistol Grip 1 item
  19. Silent Captured Spring 1 item
  20. Stock 1 item
Rail Length
  1. 6.0" 2 items
  2. 12" 1 item
  3. 12.6" 2 items
  4. 15" 3 items
Size
  1. 5 Slot 2 items
Thread Pitch
  1. 1.125x28 1 item
  2. 1/2x28 42 items
  3. 1/2x36 6 items
  4. 5/8x24 1 item
  5. M13.5x1 LH 3 items
Threaded
  1. Yes 13 items
Twist Rate
  1. 1:10 33 items
Stock Status
  1. In stock 61 items
  2. Out of stock 25 items
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