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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
  2. 18" 1 item
Caliber
  1. 5.56 NATO 1 item
Category
  1. Parts & Kits 22 items
  2. Trigger Parts 6 items
  3. Gas Systems 8 items
  4. Muzzle Devices 1 item
  5. Bolt Parts 1 item
  6. Grips 8 items
  7. Charging Handles 2 items
  8. Rifle Handguards 3 items
  9. Stocks & Braces 4 items
  10. MILSPEC Parts 1 item
Color
Configuration
  1. AR-15 1 item
  2. Left Hand 1 item
  3. .625 DIA 1 item
Finish
  1. Black 2 items
  2. Black Nitride 1 item
  3. Nitride 2 items
  4. Red 2 items
Gas Block Diameter
  1. .750" 4 items
  2. .875" 1 item
Gas System Length
  1. Mid 1 item
  2. Intermediate 1 item
Manufacturer
  1. Accu-Tac 1 item
  2. Aero Precision 1 item
  3. Aeroknox 2 items
  4. Arisaka 1 item
  5. Battle Arms Development 5 items
  6. Blitzkrieg Components 1 item
  7. Bravo Company MFG (BCM) 1 item
  8. Driven Arms Co. 2 items
  9. Elftmann Tactical 1 item
  10. Ergo Grips 2 items
  11. Faxon Firearms 2 items
  12. Fortis MFG 2 items
  13. Forward Controls Design 3 items
  14. Gear Head Works 1 item
  15. Griffin Armament 1 item
  16. HB Industries 3 items
  17. HERA ARMS 1 item
  18. JK Armament 1 item
  19. Kinetic Development Group 1 item
  20. Knight’s Armament Company (KAC) 1 item
  21. KNS Precision 1 item
  22. Kratos Design Group 1 item
  23. Lantac 1 item
  24. Magpul Industries 2 items
  25. Midwest Industries 1 item
  26. Next Level Armament 2 items
  27. Q, LLC 1 item
  28. Sig Sauer 1 item
  29. SLR Rifleworks 1 item
  30. TruCalibre 2 items
  31. V Seven Weapon Systems 6 items
Model
  1. CZ Scorpion 2 items
Mount
  1. KeyMod 1 item
  2. M-LOK 3 items
  3. Picatinny 2 items
Option
  1. AR-10 1 item
  2. AR-15 5 items
  3. Bull's Eye 1 item
  4. Vertical Lines 1 item
  5. Minimal 1 item
  6. 1.125-28 TPI 3 Lug/Booster Adaptor 1 item
  7. 1.180-24 TPI 3 Lug/Booster Adaptor 1 item
  8. CZ 5 items
  9. Non-Adjustable 4 items
Platform
  1. AR-15 5 items
  2. CZ 2 items
Product Type
  1. Accessory 1 item
  2. AR-15 Charging Handle 1 item
  3. Bolt Catch 4 items
  4. Buffer Tube 1 item
  5. Charging Handle 1 item
  6. Flash Hider 1 item
  7. Forward Assist 3 items
  8. Gas Block 7 items
  9. Handstop 3 items
  10. Lower Parts Kit 1 item
  11. Magazine Release 2 items
  12. Pistol Grip 4 items
  13. Rail Adapter 2 items
  14. Safety Selector 4 items
  15. Sight Post 1 item
  16. Stock 1 item
  17. Stock Accessory 2 items
  18. Stock Adapter 2 items
  19. Take Down / Pivot Pins 6 items
  20. Trigger 3 items
  21. Trigger Guard 1 item
  22. Vertical Grip 1 item
Rail Length
  1. 10" 1 item
  2. 12" 1 item
Size
  1. 3 Slot 1 item
  2. 5 Slot 1 item
  3. 9 Slot 3 items
Stock Status
  1. Out of stock 57 items Remove This Item
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