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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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  2. Magpul MOE PR Carbine Stock Mil-Spec
    Magpul MOE PR Carbine Stock Mil-Spec
    $42.70
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  7. True North Concepts M-LOK Aluminum Gripstop K2
    True North Concepts M-LOK Aluminum Gripstop K2
    $44.19
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  8. Driven Arms Co. Utility Compact Grip (ULCG Gen 2) - Atom
    Driven Arms Co. Utility Compact Grip (ULCG Gen 2) - Atom
    $39.95 - $44.95
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  14. Forward Controls Design EPC Billet 7075 Ejection Port Cover
    Forward Controls Design EPC Billet 7075 Ejection Port Cover
    $47.50
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  15. Rainier Industries CZ Scorpion Prime Charging Handle
    Rainier Industries CZ Scorpion Prime Charging Handle
    $42.00
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Barrel Length
  1. 16" 3 items
Caliber
  1. 9mm 2 items
Category
  1. Parts & Kits 27 items
  2. Buffer Systems 8 items
  3. Trigger Parts 2 items
  4. Gas Systems 3 items
  5. Muzzle Devices 6 items
  6. Bolt Parts 1 item
  7. Grips 14 items
  8. Charging Handles 8 items
  9. Rifle Handguards 4 items
  10. Stocks & Braces 7 items
  11. MILSPEC Parts 1 item
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Configuration
  1. Left 1 item
  2. M-LOK 1 item
Finish
  1. DLC 1 item
  2. Anodize 1 item
Gas Block Diameter
  1. .750" 1 item
Gas Length
  1. Mid 3 items
Manufacturer
  1. A3 Tactical 2 items
  2. Aero Precision 1 item
  3. B5 Systems 1 item
  4. Battle Arms Development 1 item
  5. Blitzkrieg Components 2 items
  6. Bravo Company MFG (BCM) 4 items
  7. Driven Arms Co. 4 items
  8. Emissary Development 1 item
  9. F-1 Firearms 1 item
  10. Fortis MFG 5 items
  11. Forward Controls Design 11 items
  12. HB Industries 8 items
  13. Heresy Design 1 item
  14. JK Armament 2 items
  15. JMAC Customs 2 items
  16. KNS Precision 1 item
  17. Kaw Valley Precision 1 item
  18. LUTH-AR 1 item
  19. Magpul Industries 5 items
  20. Midwest Industries 1 item
  21. Next Level Armament 1 item
  22. Patriot Ordnance Factory (POF) 1 item
  23. Rainier Arms, LLC 5 items
  24. Rainier Industries 1 item
  25. Rise Armament 3 items
  26. RS Regulate 1 item
  27. Strike Industries 1 item
  28. TruCalibre 2 items
  29. True North Concepts 3 items
  30. Tyrant Designs 1 item
  31. V Seven Weapon Systems 4 items
  32. VLTOR 3 items
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  1. CZ Bren 3 items
  2. CZ Scorpion 2 items
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  1. KeyMod 3 items
  2. M-LOK 7 items
  3. Picatinny 3 items
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  1. AK-47/74 1 item
  2. AR-9 1 item
  3. AR-15 6 items
  4. CZ 1 item
  5. Non-Adjustable 2 items
Platform
  1. AR-15 1 item
  2. CZ-USA 2 items
  3. H&K 1 item
Product Type
  1. Adapter Plate 1 item
  2. Angled Grip 3 items
  3. AR-15 Charging Handle 1 item
  4. Bolt Catch 1 item
  5. Buffer 2 items
  6. Buffer Kit 1 item
  7. Buffer Tube 5 items
  8. Castle Nut / End Plate 1 item
  9. Charging Handle 8 items
  10. Compensator 1 item
  11. Dust Cover 6 items
  12. End Cap 2 items
  13. End Plate 2 items
  14. Flash Hider 3 items
  15. Forearm Accesory 1 item
  16. Forward Assist 2 items
  17. Front Sight 1 item
  18. Gas Block 3 items
  19. Grip Accessory 1 item
  20. Handguard 2 items
  21. Handguard Adaptor 1 item
  22. Handstop 8 items
  23. Lower Parts Kit 2 items
  24. Magazine Release 1 item
  25. Magwell 1 item
  26. Muzzle Brake 2 items
  27. Muzzle Device Accessory 1 item
  28. Parts Kit 1 item
  29. Pistol Grip 3 items
  30. Port Door 1 item
  31. Safety Selector 7 items
  32. Sight Post 2 items
  33. Stock 5 items
  34. Stock Adapter 1 item
  35. Trigger 2 items
Rail Length
  1. 10" 3 items
Size
  1. 9 Slot 3 items
Thread Pitch
  1. 1/2x28 1 item
  2. 5/8x24 1 item
  3. M13.5x1 LH 1 item
Threaded
  1. Yes 1 item
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  1. In stock 83 items Remove This Item
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