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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 1 item
  4. Gas Systems 3 items
  5. Muzzle Devices 14 items
  6. Bolt Parts 1 item
  7. Grips 7 items
  8. Charging Handles 2 items
  9. Rifle Handguards 2 items
  10. Stocks & Braces 3 items
Color
Finish
  1. Nitride 4 items
  2. Anodize 2 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. Griffin Armament 1 item
  12. HB Industries 1 item
  13. JL Billet 1 item
  14. JMAC Customs 9 items
  15. JP Enterprises Inc 1 item
  16. Lantac 1 item
  17. Next Level Armament 1 item
  18. Precision Armament 1 item
  19. Rainier Industries 1 item
  20. Sons of Liberty Gun Works 2 items
  21. Spinta Precision 1 item
  22. Stern Defense 1 item
  23. 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
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 1 item
  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 1 item
  10. Charging Handle 1 item
  11. Compensator 1 item
  12. Flash Hider 5 items
  13. Gas Block 2 items
  14. Muzzle Brake 7 items
  15. Muzzle Device Accessory 1 item
  16. Pistol Grip 5 items
  17. Piston System 1 item
  18. Rail Adapter 1 item
  19. Stock Accessory 2 items
  20. Stock Adapter 1 item
  21. Vertical Grip 1 item
Rail Length
  1. 7" 1 item
  2. 9" 1 item
  3. 13" 1 item
  4. 15" 1 item
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 1 item
Twist Rate
  1. 1:7 2 items
  2. 1:10 1 item
Stock Status
  1. In stock 40 items Remove This Item
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