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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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Barrel Length
  1. 18" 1 item
Caliber
  1. .223/5.56 1 item
  2. .308 1 item
Category
  1. Parts & Kits 30 items
  2. Buffer Systems 4 items
  3. Trigger Parts 5 items
  4. Gas Systems 5 items
  5. Muzzle Devices 1 item
  6. Bolt Parts 1 item
  7. Grips 34 items
  8. Charging Handles 1 item
  9. Rifle Handguards 7 items
  10. Stocks & Braces 7 items
  11. MILSPEC Parts 4 items
Color
Configuration
  1. AR-15 1 item
  2. Cross 1 item
  3. Flaming Pig 1 item
  4. Ghetto Blaster 1 item
  5. M-LOK 1 item
  6. 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 4 items
  7. Patrol 1 item
  8. Rifle 3 items
  9. Rifle +1 2 items
  10. Rifle +2 2 items
Height
  1. Low 1 item
  2. Medium 1 item
  3. High 1 item
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 6 items
  8. Battle Arms Development 4 items
  9. Blitzkrieg Components 4 items
  10. Bravo Company MFG (BCM) 7 items
  11. Brigand Arms 1 item
  12. Chisel Machining 1 item
  13. Die Free Co 1 item
  14. Drew Meyers Defense 1 item
  15. Fortis MFG 2 items
  16. Forward Controls Design 4 items
  17. Gear Head Works 1 item
  18. Geissele 1 item
  19. Griffin Armament 1 item
  20. HB Industries 1 item
  21. JP Enterprises Inc 1 item
  22. Magpul Industries 18 items
  23. Mission First Tactical 1 item
  24. NEMO Arms 1 item
  25. Neverwear Springs 1 item
  26. Noveske 2 items
  27. Rainier Arms, LLC 3 items
  28. Rainier Industries 1 item
  29. Reptilia Corp 2 items
  30. Riflespeed 1 item
  31. Seekins Precision 1 item
  32. Sprinco (Tactical Springs) 4 items
  33. Strike Industries 12 items
  34. Tango Down 1 item
  35. True North Concepts 3 items
  36. Underground Tactical 1 item
  37. V Seven Weapon Systems 3 items
  38. WMD Guns 3 items
Model
  1. CZ Scorpion 2 items
Mount
  1. M-LOK 8 items
  2. Other 1 item
  3. Picatinny 8 items
Option
  1. AR-10 1 item
  2. AR-15 5 items
  3. White - Standard Power 1 item
  4. Blue - Enhanced Power 1 item
  5. Red - Extra Power 1 item
  6. Orange - Extra Extra Power 1 item
  7. Yellow - Reduced Power 1 item
  8. White/Red - Intermediate Power 1 item
  9. Green - Rifle Length Standard Power 1 item
  10. CZ 2 items
  11. Non-Adjustable 1 item
  12. Dimpled 2 items
  13. Serrated 2 items
Platform
  1. AR-15 2 items
  2. AK47/74 4 items
  3. CZ 2 items
Product Type
  1. Accessory 1 item
  2. Angled Grip 4 items
  3. Bolt Catch 1 item
  4. Buffer 4 items
  5. Buffer Spring 1 item
  6. Cam Pin 1 item
  7. Castle Nut 1 item
  8. Charging Handle 1 item
  9. Cheek Riser 2 items
  10. Dust Cover 5 items
  11. End Plate 5 items
  12. Forearm Accesory 2 items
  13. Gas Block 1 item
  14. Gas Tube 4 items
  15. Grip Accessory 4 items
  16. Grip Screw 1 item
  17. Handstop 5 items
  18. Magazine 1 item
  19. Magazine Catch 1 item
  20. Magazine Release 4 items
  21. Parts Kit 2 items
  22. Pistol Grip 16 items
  23. Port Door 2 items
  24. Port Door Rod 1 item
  25. Rail Panel 5 items
  26. Rail Section 1 item
  27. Recoil Spring 1 item
  28. Retainer Pin 1 item
  29. Safety Selector 1 item
  30. Shim Set 1 item
  31. Sight Post 4 items
  32. Spring 5 items
  33. Stock Accessory 6 items
  34. Stock Adapter 1 item
  35. Take Down / Pivot Pins 3 items
  36. Trigger / Hammer Pins 1 item
  37. Trigger Guard 3 items
  38. Upper Parts Kit 1 item
  39. Vertical Grip 5 items
Rail Length
  1. 12" 1 item
Size
  1. Medium 1 item
  2. Large 1 item
  3. 3 Slot 1 item
  4. 5 Slot 1 item
  5. 9 Slot 2 items
Thread Pitch
  1. 1/2x28 (.22 cal) 1 item
  2. 3/4x24 1 item
  3. 5/8x24 (.30 cal) 1 item
Stock Status
  1. In stock 103 items Remove This Item
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