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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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  2. Geissele AR-15 Super Charging Handle (SCH®)
    Geissele AR-15 Super Charging Handle (SCH®)
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  3. Geissele Airborne AR-15 Charging Handle (ACH)
    Geissele Airborne AR-15 Charging Handle (ACH)
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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 1 item
  8. Grips 13 items
  9. Charging Handles 7 items
  10. Rifle Handguards 3 items
  11. Stocks & Braces 6 items
Color
Configuration
  1. AR-15 1 item
Finish
  1. Melonite 1 item
  2. Nitride 4 items
  3. Anodize 4 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. Brügger & Thomet (B&T) 1 item
  7. B5 Systems 2 items
  8. Bravo Company MFG (BCM) 1 item
  9. Centurion Arms 1 item
  10. Faxon Firearms 2 items
  11. Fortis MFG 2 items
  12. Forward Controls Design 5 items
  13. Geissele 4 items
  14. Griffin Armament 2 items
  15. HB Industries 3 items
  16. JL Billet 1 item
  17. JMAC Customs 13 items
  18. JP Enterprises Inc 1 item
  19. Lantac 2 items
  20. Magpul Industries 1 item
  21. Next Level Armament 2 items
  22. Precision Armament 2 items
  23. Raidworx 1 item
  24. Rainier Industries 1 item
  25. Sons of Liberty Gun Works 2 items
  26. Spinta Precision 1 item
  27. Stern Defense 1 item
  28. Timney Triggers 1 item
  29. Tyrant Designs 6 items
  30. 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
  2. AK47/74 1 item
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 2 items
  7. AR-15 Stripped Lower Receiver 1 item
  8. AR-15 Stripped Upper Receiver 4 items
  9. Bolt Carrier Group 1 item
  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. Handguard 1 item
  17. Muzzle Brake 10 items
  18. Muzzle Device Accessory 1 item
  19. Pistol Grip 9 items
  20. Piston System 3 items
  21. Rail Adapter 1 item
  22. Stock 3 items
  23. Stock Accessory 2 items
  24. Stock Adapter 1 item
  25. Trigger 2 items
  26. 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. 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 44 items
  2. Out of stock 23 items
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