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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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  5. Rise Armament LE145 Single-Stage Tactical AR-15 Trigger
    Rise Armament LE145 Single-Stage Tactical AR-15 Trigger
    $139.99
    Out of stock
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  6. Aero Precision AR15 Stripped Lower Receiver Gen 2 - FDE
    Aero Precision AR15 Stripped Lower Receiver Gen 2 - FDE
    $139.99
    Out of stock
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  7. Blitzkrieg Components 9mm Hydraulic Buffer
    Blitzkrieg Components 9mm Hydraulic Buffer
    $134.99
    Out of stock
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  11. Huxwrx Muzzle Brake-QD 762 Suppressor Mount
    Huxwrx Muzzle Brake-QD 762 Suppressor Mount
    Out of stock
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  12. Aero Precision AR-15 M4E1 Stripped Lower Receiver - Black
    Aero Precision AR-15 M4E1 Stripped Lower Receiver - Black
    $139.99
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  13. Hera Arms HUS AR-15 Billet Upper Receivers
    Hera Arms HUS AR-15 Billet Upper Receivers
    $139.00
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  14. Faxon Firearms Light Tapered 9mm AR-15 Barrel - 16"
    Faxon Firearms Light Tapered 9mm AR-15 Barrel - 16"
    $133.40
    Out of stock
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  16. Angstadt Arms Ultralight M-LOK Handguard
    Angstadt Arms Ultralight M-LOK Handguard
    Out of stock
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Barrel Length
  1. 7" 1 item
  2. 16" 1 item
Caliber
  1. 5.56 NATO 1 item
  2. 7.62mm 1 item
  3. 7.62x51 1 item
  4. 9mm 1 item
Category
  1. Receiver Parts 14 items
  2. Parts & Kits 2 items
  3. Barrels 1 item
  4. Buffer Systems 6 items
  5. Trigger Parts 7 items
  6. Muzzle Devices 3 items
  7. Bolt Parts 3 items
  8. Charging Handles 2 items
  9. Rifle Handguards 5 items
  10. Stocks & Braces 7 items
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  3. M-LOK 1 item
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  1. Blowback 1 item
  2. Pistol 1 item
Inside Diameter
  1. 1.385" 1 item
Manufacturer
  1. Aero Precision 6 items
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  4. Battle Arms Development 1 item
  5. Blitzkrieg Components 1 item
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  9. Faxon Firearms 2 items
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  12. HERA ARMS 1 item
  13. HUXWRX 1 item
  14. Iron City Rifle Works 1 item
  15. JMAC Customs 1 item
  16. JP Enterprises Inc 3 items
  17. Killer Innovations 1 item
  18. Kinetic Development Group 1 item
  19. KynSHOT 2 items
  20. Magpul Industries 1 item
  21. Noveske 2 items
  22. Primary Weapon Systems 1 item
  23. Rainier Arms, LLC 3 items
  24. Rise Armament 2 items
  25. Sharps Bros 1 item
  26. Stern Defense 4 items
  27. Triggertech 4 items
Mount
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  2. AR-15 14 items
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  2. AR-10/LR308 2 items
  3. AR-15 5 items
Product Type
  1. AR-10 / LR 308 Charging Handle 1 item
  2. AR-15 Assembled Upper Receiver 1 item
  3. AR-15 Barrel 1 item
  4. AR-15 Handguard 5 items
  5. AR-15 Stripped Lower Receiver 8 items
  6. AR-15 Stripped Upper Receiver 4 items
  7. Bolt 1 item
  8. Bolt Carrier Group 2 items
  9. Brace 2 items
  10. Buffer 4 items
  11. Buffer Spring 1 item
  12. Charging Handle 1 item
  13. Chassis 1 item
  14. Handguard 1 item
  15. Lower Parts Kit 1 item
  16. Muzzle Brake 2 items
  17. Muzzle Device Accessory 1 item
  18. Safety Selector 1 item
  19. Silent Captured Spring 1 item
  20. Stock Accessory 1 item
  21. Stock Adapter 4 items
  22. Trigger 7 items
Rail Length
  1. 4" 2 items
  2. 5.5" 1 item
  3. 6.7" 2 items
  4. 7" 2 items
  5. 9.2" 1 item
  6. 9.6" 2 items
  7. 10" 1 item
  8. 11.25" 1 item
  9. 12.4" 2 items
  10. 12.6" 1 item
  11. 13.5" 1 item
  12. 13.8" 2 items
  13. 14" 1 item
  14. 15" 2 items
  15. 15.3" 2 items
Size
  1. 5 Slot 1 item
Thread Pitch
  1. 1/2x28 (9mm) 1 item
  2. 1/2x28 (.22 cal) 1 item
  3. 5/8x24 (.30 cal) 1 item
Threaded
  1. Yes 1 item
Twist Rate
  1. 1:10 1 item
Stock Status
  1. In stock 28 items
  2. Out of stock 22 items
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