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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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  5. Griffin Armament M4SD Hammer Comp 5.56mm
    Griffin Armament M4SD Hammer Comp 5.56mm
    $89.95
    Out of stock
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  7. Dead Air Sandman Flash Hider Front Cap - 5.56
    Dead Air Sandman Flash Hider Front Cap - 5.56
    $89.00
    Out of stock
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  8. Griffin Armament Taper Mount Minimalist Blast Shield
    Griffin Armament Taper Mount Minimalist Blast Shield
    $84.95
    Out of stock
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  9. Ballistic Advantage AR-15 Stripped Lower Receiver
    Ballistic Advantage AR-15 Stripped Lower Receiver
    $80.75
    Out of stock
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  14. Brügger & Thomet (B&T) APC9 / APC45 Tailhook Adaptor
    Brügger & Thomet (B&T) APC9 / APC45 Tailhook Adaptor
    $89.00
    Out of stock
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Items 65-80 of 96

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Barrel Length
  1. 7" 1 item
Caliber
  1. .22 Cal 1 item
  2. .223/5.56 3 items
  3. .30 Cal 2 items
  4. .308 2 items
  5. 5.56 NATO 3 items
  6. 5.56mm 3 items
  7. 9mm 3 items
Category
  1. Receiver Parts 2 items
  2. Parts & Kits 13 items
  3. Buffer Systems 2 items
  4. Trigger Parts 3 items
  5. Gas Systems 9 items
  6. Muzzle Devices 36 items
  7. Grips 13 items
  8. Charging Handles 9 items
  9. Stocks & Braces 9 items
Color
Configuration
  1. 90 Degree 1 item
  2. .625 DIA 2 items
  3. .800 DIA 1 item
  4. .936 DIA 1 item
Finish
  1. Black 2 items
  2. Melonite 1 item
  3. Nickel Boron 1 item
  4. Anodize 6 items
Gas Block Diameter
  1. .625" 4 items
  2. .750" 6 items
  3. .875" 4 items
  4. .936" 4 items
Gas System Length
  1. Pistol 1 item
  2. Rifle 1 item
Manufacturer
  1. A3 Tactical 6 items
  2. Aero Precision 3 items
  3. ALG Defense 1 item
  4. Arms Republic 1 item
  5. Brügger & Thomet (B&T) 1 item
  6. B5 Systems 1 item
  7. Ballistic Advantage 1 item
  8. Battle Arms Development 1 item
  9. Blackout Defense 1 item
  10. Bravo Company MFG (BCM) 6 items
  11. Centurion Arms 1 item
  12. Daniel Defense 1 item
  13. Dead Air Armament 6 items
  14. Fortis MFG 3 items
  15. Forward Controls Design 8 items
  16. Geissele 3 items
  17. Grey Ghost Precision 1 item
  18. Griffin Armament 5 items
  19. JK Armament 3 items
  20. JL Billet 1 item
  21. JMAC Customs 3 items
  22. Knight’s Armament Company (KAC) 1 item
  23. Magpul Industries 3 items
  24. NEMO Arms 1 item
  25. Noveske 3 items
  26. Precision Armament 2 items
  27. Primary Weapon Systems 7 items
  28. Q, LLC 1 item
  29. Rainier Arms, LLC 3 items
  30. Rainier Industries 2 items
  31. Sionics Weapon Systems 1 item
  32. Sons of Liberty Gun Works 1 item
  33. Superlative Arms 5 items
  34. Surefire 2 items
  35. Tyrant Designs 1 item
  36. V Seven Weapon Systems 2 items
  37. VLTOR 1 item
  38. WMD Guns 2 items
Mount
  1. M-LOK 7 items
  2. Picatinny 2 items
Option
  1. AR-10 1 item
  2. AR-15 8 items
  3. CZ 1 item
  4. Heckler & Koch 1 item
  5. Small Lever 2 items
  6. Large Lever 2 items
  7. Adjustable 5 items
  8. Non-Adjustable 2 items
Platform
  1. AR-10/LR308 1 item
  2. AR-15 5 items
  3. H&K 1 item
Product Type
  1. Angled Grip 2 items
  2. AR-10 / LR 308 Charging Handle 1 item
  3. AR-15 Charging Handle 7 items
  4. AR-15 Stripped Lower Receiver 2 items
  5. Blast Shield 1 item
  6. Buffer 2 items
  7. Charging Handle 2 items
  8. Compensator 15 items
  9. End Cap 3 items
  10. Flash Hider 8 items
  11. Gas Block 8 items
  12. Gas Tube 1 item
  13. Lower Parts Kit 3 items
  14. Magazine Release 1 item
  15. Muzzle Brake 11 items
  16. Muzzle Device Accessory 1 item
  17. Pistol Grip 4 items
  18. Safety Selector 6 items
  19. Stock 6 items
  20. Stock Adapter 3 items
  21. Trigger 3 items
  22. Vertical Grip 8 items
Rail Length
  1. 12.6" 1 item
Size
  1. Medium 1 item
  2. Large 1 item
  3. 5 Slot 1 item
Thread Pitch
  1. 1/2x28 (9mm) 1 item
  2. 1/2x28 (.22 cal) 22 items
  3. 5/8x24 (.30 cal) 11 items
  4. M13.5x1 LH 1 item
Threaded
  1. Yes 9 items
Stock Status
  1. In stock 68 items
  2. Out of stock 28 items
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