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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. Forward Controls Design PCM Cable Management Panel
    Forward Controls Design PCM Cable Management Panel
    $28.50
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  3. Rainier Industries AR-15 Extended Take Down / Pivot Pin Set
    Rainier Industries AR-15 Extended Take Down / Pivot Pin Set
    $20.00
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  4. Naroh Keymod Barrier Stop
    Naroh Keymod Barrier Stop
    Special Price $24.92 Regular Price $36.50
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  6. Tyrant Designs AR Enhanced Takedown Pins
    Tyrant Designs AR Enhanced Takedown Pins
    $26.95
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  7. Fortis MFG AR15/AR10 Billet Magazine Catch & Release Button
    Fortis MFG AR15/AR10 Billet Magazine Catch & Release Button
    $23.70 - $24.95
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  13. Unity Tactical VFG M-LOK Vertical Grip
    Unity Tactical VFG M-LOK Vertical Grip
    $24.00
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  14. Ergo Aggressive Texture AR15 Suregrip
    Ergo Aggressive Texture AR15 Suregrip
    $21.55
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  15. Magpul MOE K2-XL Grip
    Magpul MOE K2-XL Grip
    $22.75
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  16. True North Concepts M-LOK Polymer Gripstop Standard
    True North Concepts M-LOK Polymer Gripstop Standard
    $22.99
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Items 1-16 of 95

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  1. Price $20.00 - $29.99 Remove This Item
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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
Category
  1. Parts & Kits 32 items
  2. Buffer Systems 2 items
  3. Trigger Parts 6 items
  4. Gas Systems 5 items
  5. Muzzle Devices 1 item
  6. Bolt Parts 2 items
  7. Grips 29 items
  8. Charging Handles 1 item
  9. Rifle Handguards 8 items
  10. Stocks & Braces 2 items
  11. MILSPEC Parts 6 items
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Configuration
  1. AR-15 3 items
  2. M-LOK 1 item
  3. .625 DIA 2 items
  4. .750 DIA 2 items
  5. .875 DIA 2 items
  6. .936 DIA 1 item
Finish
  1. Black 1 item
  2. Anodize 3 items
Gas Block Diameter
  1. .750" 1 item
Gas Length
  1. Pistol 1 item
  2. Intermediate 3 items
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  1. Absolute Co-Witness 1 item
Is Firearms?
  1. No 95 items
Manufacturer
  1. A3 Tactical 1 item
  2. Apex Tactical Specialties 1 item
  3. Arisaka 2 items
  4. Ascalon Arms 1 item
  5. Battle Arms Development 3 items
  6. Blitzkrieg Components 3 items
  7. Bravo Company MFG (BCM) 3 items
  8. Cross Machine Tool (CMT) 4 items
  9. Die Free Co 1 item
  10. Drew Meyers Defense 3 items
  11. Driven Arms Co. 2 items
  12. Ergo Grips 1 item
  13. Fortis MFG 4 items
  14. Forward Controls Design 5 items
  15. Geissele 2 items
  16. HB Industries 1 item
  17. HUXWRX 1 item
  18. JP Enterprises Inc 2 items
  19. Knight’s Armament Company (KAC) 1 item
  20. KNS Precision 3 items
  21. Kratos Design Group 1 item
  22. Mag-Pod 1 item
  23. Magpul Industries 10 items
  24. Multitasker Tools 1 item
  25. Next Level Armament 1 item
  26. Noveske 2 items
  27. Patriot Ordnance Factory (POF) 1 item
  28. Rainier Arms, LLC 3 items
  29. Rainier Industries 3 items
  30. Reptilia Corp 1 item
  31. Stag Arms 1 item
  32. Strike Industries 5 items
  33. Tactical Edge Arms 1 item
  34. TruCalibre 1 item
  35. True North Concepts 4 items
  36. Tyrant Designs 1 item
  37. Unity Tactical 1 item
  38. V Seven Weapon Systems 7 items
Model
  1. CZ Scorpion 3 items
  2. Sig MPX 1 item
Mount
  1. KeyMod 1 item
  2. M-LOK 15 items
  3. Picatinny 6 items
Option
  1. AR-10 3 items
  2. AR-15 10 items
  3. CZ 3 items
  4. Green Laser 1 item
  5. Non-Adjustable 5 items
Platform
  1. AR-15 3 items
  2. CZ-USA 3 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 2 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. Forearm Accesory 3 items
  16. Forward Assist 1 item
  17. Gas Block 5 items
  18. Grip Accessory 1 item
  19. Handguard Adaptor 1 item
  20. Handstop 8 items
  21. Lower Parts Kit 2 items
  22. Magazine Catch 1 item
  23. Magazine Release 4 items
  24. Parts Kit 4 items
  25. Pistol Grip 14 items
  26. Pistol Part 1 item
  27. Port Door Rod 2 items
  28. Rail Cover 2 items
  29. Rail Panel 1 item
  30. Safety Selector 1 item
  31. Shim Set 1 item
  32. Sight Post 3 items
  33. Stock Accessory 1 item
  34. Take Down / Pivot Pins 6 items
  35. Trigger / Hammer Pins 1 item
  36. Trigger Guard 6 items
  37. Upper Parts Kit 1 item
  38. Vertical Grip 2 items
Rail Length
  1. 12" 4 items
Size
  1. 9 Slot 4 items
Thread Pitch
  1. 1/2x28 2 items
  2. 5/8x24 1 item
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  1. In stock 95 items Remove This Item
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