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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 $100.00 - $109.99 Remove This Item
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Barrel Length
  1. 6" 1 item
  2. 7.5" 1 item
  3. 8" 1 item
  4. 10.5" 1 item
Caliber
  1. .223 Wylde 1 item
  2. .30 Cal 1 item
  3. .308 1 item
  4. 5.56 NATO 5 items
  5. 5.56mm 1 item
  6. 9mm 2 items
Category
  1. Receiver Parts 6 items
  2. Barrels 4 items
  3. Buffer Systems 4 items
  4. Trigger Parts 2 items
  5. Gas Systems 5 items
  6. Muzzle Devices 18 items
  7. Bolt Parts 2 items
  8. Grips 12 items
  9. Charging Handles 7 items
  10. Rifle Handguards 2 items
  11. Stocks & Braces 6 items
Color
Configuration
  1. AR-15 1 item
Finish
  1. Melonite 1 item
  2. Nitride 4 items
  3. 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 4 items
  3. Andro Corp Industries 1 item
  4. Angstadt Arms 1 item
  5. Arisaka 1 item
  6. Arms Republic 1 item
  7. Brügger & Thomet (B&T) 1 item
  8. B5 Systems 2 items
  9. Bravo Company MFG (BCM) 1 item
  10. Centurion Arms 1 item
  11. Faxon Firearms 2 items
  12. Fortis MFG 2 items
  13. Forward Controls Design 5 items
  14. Geissele 4 items
  15. Griffin Armament 2 items
  16. HB Industries 3 items
  17. JL Billet 1 item
  18. JMAC Customs 12 items
  19. JP Enterprises Inc 1 item
  20. Lantac 1 item
  21. Magpul Industries 1 item
  22. Next Level Armament 2 items
  23. Precision Armament 2 items
  24. Raidworx 1 item
  25. Rainier Industries 1 item
  26. Sons of Liberty Gun Works 2 items
  27. Spinta Precision 1 item
  28. Stern Defense 1 item
  29. Timney Triggers 1 item
  30. Tyrant Designs 6 items
  31. VKTR Industries 1 item
Mount
  1. Picatinny 3 items
Option
  1. AK-47/74 1 item
  2. AR-15 9 items
  3. Small Lever 1 item
  4. Large Lever 1 item
  5. Non-Adjustable 2 items
Platform
  1. AR-15 7 items
Product Type
  1. Angled Grip 1 item
  2. AR-10 / LR 308 Charging Handle 1 item
  3. AR-15 Assembled Upper Receiver 1 item
  4. AR-15 Barrel 4 items
  5. AR-15 Charging Handle 4 items
  6. AR-15 Handguard 1 item
  7. AR-15 Stripped Lower Receiver 1 item
  8. AR-15 Stripped Upper Receiver 4 items
  9. Bolt Carrier Group 2 items
  10. Buffer Kit 3 items
  11. Buffer Tube 1 item
  12. Charging Handle 3 items
  13. Compensator 2 items
  14. Flash Hider 5 items
  15. Gas Block 2 items
  16. Muzzle Brake 10 items
  17. Muzzle Device Accessory 1 item
  18. Pistol Grip 8 items
  19. Piston System 3 items
  20. Rail Adapter 1 item
  21. Stock 3 items
  22. Stock Accessory 2 items
  23. Stock Adapter 1 item
  24. Trigger 2 items
  25. Vertical Grip 1 item
Rail Length
  1. 7" 1 item
  2. 9" 1 item
  3. 13" 1 item
  4. 15" 1 item
Size
  1. BACK STRAP:Large 1 item
  2. BACK STRAP:Medium 2 items
  3. Medium 1 item
  4. Large 1 item
Thread Pitch
  1. 1.375-24 1 item
  2. 1/2x28 (9mm) 1 item
  3. 1/2x28 (.22 cal) 8 items
  4. 1/2x36 1 item
  5. 5/8x24 (.30 cal) 5 items
  6. M13.5x1 LH 1 item
  7. M14x1 LH 2 items
Twist Rate
  1. 1:7 2 items
  2. 1:10 2 items
Stock Status
  1. In stock 40 items
  2. Out of stock 26 items
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