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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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  1. Price $200.00 - $299.99 Remove This Item
  2. Option AR-15 Remove This Item
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Shopping Options
Barrel Length
  1. 10.3" 1 item
  2. 18" 1 item
Caliber
  1. 5.56 NATO 1 item
Category
  1. Receiver Parts 13 items
  2. Buffer Systems 2 items
  3. Trigger Parts 2 items
  4. Bolt Parts 1 item
  5. Rifle Handguards 15 items
  6. Stocks & Braces 1 item
Color
Configuration
  1. AR-15 2 items
Finish
  1. Anodize 3 items
Gas Block Diameter
  1. .750" 1 item
Gas System Length
  1. Intermediate 1 item
Height
  1. Absolute Co-Witness 1 item
Inside Diameter
  1. 1.3" 1 item
  2. 1.34" 2 items
  3. 1.4" 1 item
Manufacturer
  1. Andro Corp Industries 2 items
  2. Bravo Company MFG (BCM) 4 items
  3. Centurion Arms 3 items
  4. DPM Systems Technologies 1 item
  5. Fortis MFG 5 items
  6. Forward Controls Design 1 item
  7. FosTecH 1 item
  8. Geissele 1 item
  9. Griffin Armament 1 item
  10. JL Billet 1 item
  11. JP Enterprises Inc 1 item
  12. Lantac 1 item
  13. Maxim Defense 1 item
  14. Noveske 4 items
  15. Rainier Arms, LLC 1 item
  16. RogueOps 1 item
  17. Sharps Bros 2 items
  18. Sons of Liberty Gun Works 1 item
  19. Tactical Edge Arms 1 item
  20. Timney Triggers 1 item
Mount
  1. M-LOK 9 items
  2. Picatinny 3 items
Platform
  1. AR-15 3 items
Price
  1. $200.00 - $209.99 2 items
  2. $210.00 - $219.99 6 items
  3. $220.00 - $229.99 3 items
  4. $230.00 - $239.99 3 items
  5. $240.00 - $249.99 1 item
  6. $250.00 - $259.99 5 items
  7. $260.00 - $269.99 8 items
  8. $270.00 - $279.99 2 items
  9. $280.00 - $289.99 3 items
  10. $290.00 and above 1 item
Product Type
  1. AR-15 Assembled Upper Receiver 1 item
  2. AR-15 Complete Lower Receiver 3 items
  3. AR-15 Partial Upper Receiver 1 item
  4. AR-15 Handguard 14 items
  5. AR-15 Receiver Set 2 items
  6. AR-15 Stripped Lower Receiver 5 items
  7. AR-15 Stripped Upper Receiver 1 item
  8. Bolt Carrier Group 1 item
  9. Brace 1 item
  10. Buffer 1 item
  11. Buffer Kit 1 item
  12. Handguard 2 items
  13. Trigger 2 items
Rail Length
  1. 6.7" 2 items
  2. 7" 2 items
  3. 7.2" 1 item
  4. 8" 1 item
  5. 9" 2 items
  6. 9.15" 2 items
  7. 9.3" 1 item
  8. 9.5" 1 item
  9. 9.6" 3 items
  10. 10" 3 items
  11. 10.5" 1 item
  12. 11" 1 item
  13. 11.1" 1 item
  14. 11.8" 2 items
  15. 12" 3 items
  16. 13" 4 items
  17. 13.5" 2 items
  18. 13.8" 3 items
  19. 15" 5 items
  20. 15.3" 3 items
  21. 16.5" 1 item
Size
  1. 9 Slot 1 item
Thread Pitch
  1. 1/2x28 (.22 cal) 1 item
Stock Status
  1. In stock 33 items Remove This Item
  2. Out of stock 1 item
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