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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. Magpul AR-15 Enhanced Ejection Port Cover
    Magpul AR-15 Enhanced Ejection Port Cover
    $14.20
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  2. Magpul XT Texture Rail Panel
    Magpul XT Texture Rail Panel
    $11.35
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  3. Magpul XTM Hand Stop Kit
    Magpul XTM Hand Stop Kit
    $10.00 - $19.90
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  4. Magpul XTM Enhanced Rail Panels
    Magpul XTM Enhanced Rail Panels
    $3.00 - $11.35
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  6. Rainier Industries Single Point QD End Plate
    Rainier Industries Single Point QD End Plate
    $19.00
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  7. Reptilia Corp AR-15/SR-25 CQG Pistol Grip
    Reptilia Corp AR-15/SR-25 CQG Pistol Grip
    $19.76
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  9. Reptilia Corp AR-15/SR-25 CQG-NB No Backstrap Pistol Grip
    Reptilia Corp AR-15/SR-25 CQG-NB No Backstrap Pistol Grip
    $19.76
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  11. Strike Industries AR-15 Mil-Spec Buffer Housing
    Strike Industries AR-15 Mil-Spec Buffer Housing
    $16.95
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  12. Strike Industries Angled Vertical Grip for Picatinny Rails W/ Cable Management (Short)
    Strike Industries Angled Vertical Grip for Picatinny Rails W/ Cable Management (Short)
    $15.95
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  14. Flatline Fiber Co SBA3 Pistol Brace Strap
    Flatline Fiber Co SBA3 Pistol Brace Strap
    $18.00
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  15. Bravo Company MFG (BCM) GUNFIGHTER KAG - 1913 Picatinny
    Bravo Company MFG (BCM) GUNFIGHTER KAG - 1913 Picatinny
    $19.95
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Items 97-111 of 111

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  1. Price $10.00 - $19.99 Remove This Item
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Barrel Length
  1. 18" 2 items
Caliber
  1. .223/5.56 1 item
Category
  1. Parts & Kits 30 items
  2. Buffer Systems 6 items
  3. Trigger Parts 8 items
  4. Gas Systems 5 items
  5. Muzzle Devices 1 item
  6. Bolt Parts 1 item
  7. Grips 29 items
  8. Charging Handles 1 item
  9. Rifle Handguards 9 items
  10. Stocks & Braces 12 items
  11. MILSPEC Parts 4 items
Color
Configuration
  1. AR-15 2 items
  2. M-LOK 1 item
  3. Rifle 1 item
Finish
  1. Black 3 items
  2. FDE 2 items
  3. NiB-X 1 item
  4. Nitride 1 item
  5. Nitromet 2 items
Gas Block Diameter
  1. .750" 1 item
Gas System Length
  1. Pistol -1 2 items
  2. Pistol 3 items
  3. Carbine 4 items
  4. Micro 1 item
  5. Mid 3 items
  6. Intermediate 5 items
  7. Patrol 1 item
  8. Rifle 3 items
  9. Rifle +1 2 items
  10. Rifle +2 2 items
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  1. Low 1 item
  2. Medium 1 item
  3. High 1 item
Is Firearms?
  1. No 111 items
Magazine Capacity
  1. 32rd 1 item
Manufacturer
  1. A3 Tactical 1 item
  2. Advanced Armament Company (AAC) 1 item
  3. ALG Defense 1 item
  4. Andro Corp Industries 1 item
  5. Armaspec 1 item
  6. Arms Republic 1 item
  7. B5 Systems 4 items
  8. Battle Arms Development 2 items
  9. Blitzkrieg Components 4 items
  10. Bravo Company MFG (BCM) 8 items
  11. Brigand Arms 1 item
  12. Chisel Machining 1 item
  13. Flatline Fiber Co 1 item
  14. Fortis MFG 2 items
  15. Forward Controls Design 4 items
  16. Gear Head Works 1 item
  17. Griffin Armament 1 item
  18. HB Industries 1 item
  19. HERA ARMS 4 items
  20. JP Enterprises Inc 2 items
  21. KNS Precision 2 items
  22. Krebs Customs 1 item
  23. Leitner-Wise 1 item
  24. Magpul Industries 21 items
  25. Mission First Tactical 1 item
  26. NEMO Arms 1 item
  27. Neverwear Springs 1 item
  28. Noveske 1 item
  29. Patriot Ordnance Factory (POF) 1 item
  30. Rainier Arms, LLC 3 items
  31. Rainier Industries 1 item
  32. Reptilia Corp 3 items
  33. Riflespeed 1 item
  34. Rise Armament 1 item
  35. Seekins Precision 2 items
  36. Sprinco (Tactical Springs) 2 items
  37. Strike Industries 13 items
  38. Tango Down 1 item
  39. Taran Tactical Innovations 1 item
  40. Underground Tactical 1 item
  41. V Seven Weapon Systems 3 items
  42. WMD Guns 3 items
Model
  1. CZ Scorpion 1 item
Mount
  1. M-LOK 6 items
  2. Other 1 item
  3. Picatinny 9 items
Option
  1. AR-10 2 items
  2. AR-15 4 items
  3. White - Standard Power 1 item
  4. Blue - Enhanced Power 1 item
  5. Red - Extra Power 1 item
  6. Yellow - Reduced Power 1 item
  7. White/Red - Intermediate Power 1 item
  8. Green - Rifle Length Standard Power 1 item
  9. CZ 1 item
  10. Non-Adjustable 1 item
  11. Dimpled 2 items
  12. Serrated 2 items
Platform
  1. AR-15 3 items
  2. AK47/74 3 items
  3. CZ-USA 1 item
Product Type
  1. Accessory 1 item
  2. Angled Grip 4 items
  3. Anti Walk Pins 2 items
  4. Bolt Catch 2 items
  5. Brace Strap 1 item
  6. Buffer 4 items
  7. Buffer Spring 2 items
  8. Cam Pin 1 item
  9. Castle Nut 1 item
  10. Charging Handle 1 item
  11. Cheek Riser 3 items
  12. Dust Cover 4 items
  13. End Plate 5 items
  14. Forearm Accesory 4 items
  15. Forward Assist 2 items
  16. Gas Block 1 item
  17. Gas Tube 4 items
  18. Grip Accessory 5 items
  19. Grip Screw 1 item
  20. Handstop 1 item
  21. Magazine 1 item
  22. Magazine Catch 1 item
  23. Magazine Release 3 items
  24. Parts Kit 1 item
  25. Pistol Grip 12 items
  26. Port Door 1 item
  27. Port Door Rod 1 item
  28. Rail Panel 6 items
  29. Rail Section 1 item
  30. Recoil Spring 1 item
  31. Retainer Pin 4 items
  32. Safety Selector 2 items
  33. Shim Set 1 item
  34. Sight Post 4 items
  35. Spring 4 items
  36. Stock 1 item
  37. Stock Accessory 6 items
  38. Stock Adapter 1 item
  39. Take Down / Pivot Pins 1 item
  40. Trigger / Hammer Pins 2 items
  41. Trigger Guard 3 items
  42. Upper Parts Kit 1 item
  43. Vertical Grip 7 items
Rail Length
  1. 12" 2 items
Size
  1. Medium 1 item
  2. Large 1 item
  3. 3 Slot 1 item
  4. 5 Slot 1 item
  5. 9 Slot 3 items
Thread Pitch
  1. 1/2x28 1 item
  2. 3/4x24 1 item
  3. 5/8x24 1 item
Stock Status
  1. In stock 111 items Remove This Item
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