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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. Forward Controls Design CN5F A5 Billet Castle Nut
    Forward Controls Design CN5F A5 Billet Castle Nut
    $22.80 - $32.30
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  8. Kratos Design Group Low-Profile M-LOK Handstop
    Kratos Design Group Low-Profile M-LOK Handstop
    $23.99
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  10. Bravo Company MFG (BCM) GUNFIGHTER Grip Mod 0
    Bravo Company MFG (BCM) GUNFIGHTER Grip Mod 0
    $25.95
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  12. Fortis MFG Enhanced Takedown & Pivot Pin Set
    Fortis MFG Enhanced Takedown & Pivot Pin Set
    $21.80
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  13. KNS Anti-Rotational Pins - .154 Gen 2
    KNS Anti-Rotational Pins - .154 Gen 2
    $29.00 - $35.00
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  15. Strike Industries Cobra Billet Aluminum Trigger Guard
    Strike Industries Cobra Billet Aluminum Trigger Guard
    $25.95 - $27.95
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  16. Strike Industries Fang Billet Aluminum Trigger Guard
    Strike Industries Fang Billet Aluminum Trigger Guard
    $18.95 - $20.95
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Items 65-80 of 124

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Barrel Length
  1. 16" 1 item
  2. 18" 3 items
Caliber
  1. .223/5.56 2 items
  2. .308 1 item
  3. 9mm 1 item
Category
  1. Parts & Kits 43 items
  2. Buffer Systems 3 items
  3. Trigger Parts 8 items
  4. Gas Systems 10 items
  5. Muzzle Devices 3 items
  6. Bolt Parts 3 items
  7. Grips 34 items
  8. Charging Handles 1 item
  9. Rifle Handguards 9 items
  10. Stocks & Braces 2 items
  11. MILSPEC Parts 6 items
Color
Configuration
  1. AR-15 3 items
  2. M-LOK 1 item
  3. .625 DIA 2 items
  4. .750 DIA 3 items
  5. .875 DIA 2 items
  6. .936 DIA 2 items
Finish
  1. Black 1 item
  2. Anodize 3 items
  3. Quench Polish Quench (QPQ) 1 item
Gas Block Diameter
  1. .750" 2 items
  2. .875" 1 item
Gas Length
  1. Pistol 2 items
  2. Carbine 1 item
  3. Mid 1 item
  4. Intermediate 4 items
  5. Rifle 1 item
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  1. Absolute Co-Witness 1 item
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  1. No 124 items
Manufacturer
  1. A3 Tactical 1 item
  2. Aero Precision 1 item
  3. Apex Tactical Specialties 2 items
  4. Arisaka 2 items
  5. Ascalon Arms 2 items
  6. Ballistic Advantage 1 item
  7. Battle Arms Development 7 items
  8. Blitzkrieg Components 5 items
  9. Bravo Company MFG (BCM) 3 items
  10. Cross Machine Tool (CMT) 5 items
  11. Die Free Co 1 item
  12. Drew Meyers Defense 3 items
  13. Driven Arms Co. 2 items
  14. Ergo Grips 2 items
  15. Faxon Firearms 2 items
  16. Fortis MFG 4 items
  17. Forward Controls Design 6 items
  18. Geissele 3 items
  19. HB Industries 3 items
  20. HERA ARMS 1 item
  21. HUXWRX 1 item
  22. JP Enterprises Inc 2 items
  23. Knight’s Armament Company (KAC) 1 item
  24. KNS Precision 3 items
  25. Kalashnikov USA 1 item
  26. Kratos Design Group 1 item
  27. Lantac 2 items
  28. Mag-Pod 1 item
  29. Magpul Industries 13 items
  30. Multitasker Tools 1 item
  31. Next Level Armament 2 items
  32. Noveske 2 items
  33. Patriot Ordnance Factory (POF) 1 item
  34. Precision Armament 1 item
  35. Rainier Arms, LLC 4 items
  36. Rainier Industries 3 items
  37. Reptilia Corp 1 item
  38. Stag Arms 1 item
  39. Strike Industries 6 items
  40. Tactical Edge Arms 1 item
  41. TruCalibre 1 item
  42. True North Concepts 4 items
  43. Tyrant Designs 1 item
  44. Unity Tactical 1 item
  45. V Seven Weapon Systems 7 items
Model
  1. CZ Scorpion 5 items
  2. Sig MPX 1 item
Mount
  1. KeyMod 1 item
  2. M-LOK 16 items
  3. Picatinny 7 items
Option
  1. AR-10 4 items
  2. AR-15 13 items
  3. CZ 6 items
  4. Green Laser 1 item
  5. Non-Adjustable 8 items
Platform
  1. AR-15 4 items
  2. CZ-USA 5 items
  3. Sig Sauer 1 item
Product Type
  1. Angled Grip 3 items
  2. AR-10 Handguard 1 item
  3. AR-15 Charging Handle 1 item
  4. Bolt Catch 3 items
  5. Buffer 3 items
  6. Buffer Spring 2 items
  7. Cam Pin 3 items
  8. Castle Nut 2 items
  9. Cable Clip 1 item
  10. Cheek Riser 1 item
  11. Compensator 1 item
  12. Dust Cover 1 item
  13. End Plate 2 items
  14. Finger Stop 2 items
  15. Flash Hider 1 item
  16. Forearm Accesory 3 items
  17. Forward Assist 1 item
  18. Gas Block 9 items
  19. Gas Tube 1 item
  20. Grip Accessory 1 item
  21. Handguard 1 item
  22. Handguard Adaptor 1 item
  23. Handstop 9 items
  24. Lower Parts Kit 2 items
  25. Magazine Catch 1 item
  26. Magazine Release 6 items
  27. Muzzle Device Accessory 1 item
  28. Parts Kit 4 items
  29. Pistol Grip 17 items
  30. Pistol Part 1 item
  31. Port Door Rod 2 items
  32. Rail Cover 2 items
  33. Rail Panel 1 item
  34. Safety Selector 3 items
  35. Shim Set 1 item
  36. Sight Post 4 items
  37. Stock Accessory 2 items
  38. Take Down / Pivot Pins 9 items
  39. Trigger / Hammer Pins 1 item
  40. Trigger Guard 7 items
  41. Trigger Spring 1 item
  42. Upper Parts Kit 2 items
  43. Vertical Grip 3 items
  44. Weight 1 item
Rail Length
  1. 12" 4 items
Size
  1. 9 Slot 4 items
Thread Pitch
  1. 1/2x28 5 items
  2. 5/8x24 2 items
Stock Status
  1. In stock 96 items
  2. Out of stock 28 items
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