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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. 7.5" 1 item
  2. 8" 1 item
  3. 10.5" 1 item
Caliber
  1. .223 Wylde 1 item
  2. .30 Cal 1 item
  3. .308 1 item
  4. 5.56 NATO 4 items
  5. 5.56mm 1 item
  6. 9mm 1 item
Category
  1. Receiver Parts 4 items
  2. Barrels 3 items
  3. Buffer Systems 2 items
  4. Trigger Parts 2 items
  5. Gas Systems 3 items
  6. Muzzle Devices 15 items
  7. Bolt Parts 1 item
  8. Grips 8 items
  9. Charging Handles 2 items
  10. Rifle Handguards 3 items
  11. Stocks & Braces 3 items
Color
Finish
  1. Nitride 4 items
  2. Anodize 3 items
Gas Block Diameter
  1. .750" 2 items
Gas System Length
  1. Blowback 1 item
  2. Pistol 1 item
  3. Carbine 1 item
Manufacturer
  1. A3 Tactical 1 item
  2. Aero Precision 1 item
  3. Andro Corp Industries 1 item
  4. Arisaka 1 item
  5. Brügger & Thomet (B&T) 1 item
  6. Bravo Company MFG (BCM) 1 item
  7. Centurion Arms 1 item
  8. Faxon Firearms 2 items
  9. Fortis MFG 2 items
  10. Forward Controls Design 5 items
  11. Geissele 2 items
  12. Griffin Armament 1 item
  13. HB Industries 1 item
  14. JL Billet 1 item
  15. JMAC Customs 11 items
  16. JP Enterprises Inc 1 item
  17. Lantac 2 items
  18. Next Level Armament 1 item
  19. Precision Armament 1 item
  20. Rainier Industries 1 item
  21. Sons of Liberty Gun Works 2 items
  22. Spinta Precision 1 item
  23. Stern Defense 1 item
  24. Timney Triggers 1 item
  25. Tyrant Designs 3 items
Mount
  1. Picatinny 3 items
Option
  1. AR-15 5 items
  2. Small Lever 1 item
  3. Large Lever 1 item
  4. Non-Adjustable 2 items
Platform
  1. AR-15 3 items
  2. AK47/74 1 item
Product Type
  1. Angled Grip 1 item
  2. AR-15 Assembled Upper Receiver 1 item
  3. AR-15 Barrel 3 items
  4. AR-15 Charging Handle 1 item
  5. AR-15 Handguard 2 items
  6. AR-15 Stripped Lower Receiver 1 item
  7. AR-15 Stripped Upper Receiver 2 items
  8. Bolt Carrier Group 1 item
  9. Buffer Kit 2 items
  10. Charging Handle 1 item
  11. Compensator 1 item
  12. Flash Hider 5 items
  13. Gas Block 2 items
  14. Handguard 1 item
  15. Muzzle Brake 8 items
  16. Muzzle Device Accessory 1 item
  17. Pistol Grip 6 items
  18. Piston System 1 item
  19. Rail Adapter 1 item
  20. Stock Accessory 2 items
  21. Stock Adapter 1 item
  22. Trigger 2 items
  23. Vertical Grip 1 item
Rail Length
  1. 6.75" 1 item
  2. 7" 1 item
  3. 9" 1 item
  4. 10.5" 1 item
  5. 12.5" 1 item
  6. 13" 1 item
  7. 13.5" 1 item
  8. 15" 2 items
Size
  1. Medium 1 item
  2. Large 1 item
Thread Pitch
  1. 1.375-24 1 item
  2. 1/2x28 (.22 cal) 8 items
  3. 1/2x36 1 item
  4. 5/8x24 (.30 cal) 4 items
  5. M13.5x1 LH 1 item
  6. M14x1 LH 2 items
Twist Rate
  1. 1:7 2 items
  2. 1:10 1 item
Stock Status
  1. In stock 44 items Remove This Item
  2. Out of stock 2 items
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