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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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Barrel Length
  1. 16" 1 item
Caliber
  1. 9mm 2 items
Category
  1. Parts & Kits 23 items
  2. Buffer Systems 6 items
  3. Gas Systems 2 items
  4. Muzzle Devices 5 items
  5. Grips 17 items
  6. Charging Handles 7 items
  7. Rifle Handguards 5 items
  8. Stocks & Braces 7 items
  9. MILSPEC Parts 2 items
Color
Configuration
  1. M-LOK 1 item
Finish
  1. DLC 1 item
  2. Anodize 2 items
Gas System Length
  1. Mid 1 item
Manufacturer
  1. A3 Tactical 2 items
  2. Aero Precision 1 item
  3. B5 Systems 1 item
  4. Blitzkrieg Components 1 item
  5. Bravo Company MFG (BCM) 4 items
  6. Driven Arms Co. 5 items
  7. Emissary Development 2 items
  8. F-1 Firearms 1 item
  9. Fortis MFG 6 items
  10. Forward Controls Design 9 items
  11. HB Industries 5 items
  12. Heresy Design 1 item
  13. Hiperfire 1 item
  14. JK Armament 2 items
  15. JMAC Customs 1 item
  16. KNS Precision 1 item
  17. Kaw Valley Precision 1 item
  18. Magpul Industries 5 items
  19. Maxim Defense 2 items
  20. Midwest Industries 1 item
  21. Mission First Tactical 1 item
  22. Next Level Armament 1 item
  23. Odin Works 1 item
  24. Primary Weapon Systems 1 item
  25. Q, LLC 1 item
  26. Rainier Arms, LLC 5 items
  27. Rainier Industries 1 item
  28. Rise Armament 2 items
  29. Strike Industries 2 items
  30. True North Concepts 3 items
  31. V Seven Weapon Systems 1 item
  32. VLTOR 1 item
Model
  1. CZ Bren 1 item
  2. CZ Scorpion 1 item
Mount
  1. KeyMod 1 item
  2. M-LOK 8 items
  3. Other 1 item
  4. Picatinny 3 items
Option
  1. AK-47/74 1 item
  2. AR-9 1 item
  3. AR-15 3 items
  4. 4.720" 2 items
  5. 6.295" 2 items
  6. 7.870" 2 items
  7. 9.445" 2 items
  8. Non-Adjustable 2 items
Platform
  1. AR-15 1 item
  2. CZ 1 item
Product Type
  1. Adapter Plate 1 item
  2. Angled Grip 4 items
  3. AR-15 Charging Handle 1 item
  4. Buffer 4 items
  5. Buffer Kit 1 item
  6. Buffer Tube 2 items
  7. Castle Nut / End Plate 2 items
  8. Charging Handle 7 items
  9. Dust Cover 3 items
  10. End Cap 1 item
  11. End Plate 2 items
  12. Flash Hider 2 items
  13. Forearm Accesory 1 item
  14. Forward Assist 1 item
  15. Front Sight 1 item
  16. Gas Block 2 items
  17. Grip Accessory 1 item
  18. Handguard 1 item
  19. Handguard Adaptor 1 item
  20. Handstop 10 items
  21. Lower Parts Kit 2 items
  22. Magwell 2 items
  23. Muzzle Brake 3 items
  24. Muzzle Device Accessory 1 item
  25. Parts Kit 1 item
  26. Pistol Grip 3 items
  27. Port Door 1 item
  28. Rail Adapter 2 items
  29. Safety Selector 7 items
  30. Sight Post 1 item
  31. Stock 6 items
Rail Length
  1. 10" 1 item
Size
  1. 9 Slot 1 item
Thread Pitch
  1. 1/2x28 (.22 cal) 1 item
  2. 5/8x24 (.30 cal) 1 item
  3. M13.5x1 LH 1 item
Threaded
  1. Yes 1 item
Stock Status
  1. In stock 75 items Remove This Item
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