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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. 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
  2. .308 1 item
Category
  1. Parts & Kits 42 items
  2. Buffer Systems 6 items
  3. Trigger Parts 10 items
  4. Gas Systems 5 items
  5. Muzzle Devices 1 item
  6. Bolt Parts 2 items
  7. Grips 40 items
  8. Charging Handles 1 item
  9. Rifle Handguards 10 items
  10. Stocks & Braces 8 items
  11. MILSPEC Parts 5 items
Color
Configuration
  1. AR-15 2 items
  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 4 items
  2. FDE 2 items
  3. NiB-X 2 items
  4. Nitride 1 item
  5. Nitromet 3 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
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. Aero Precision 1 item
  4. ALG Defense 1 item
  5. Andro Corp Industries 1 item
  6. Armaspec 2 items
  7. Ascalon Arms 1 item
  8. B5 Systems 6 items
  9. Battle Arms Development 9 items
  10. Blitzkrieg Components 4 items
  11. Bravo Company MFG (BCM) 8 items
  12. Brigand Arms 1 item
  13. Chisel Machining 1 item
  14. Die Free Co 2 items
  15. Drew Meyers Defense 1 item
  16. Elftmann Tactical 1 item
  17. Ergo Grips 1 item
  18. Flatline Fiber Co 1 item
  19. Fortis MFG 2 items
  20. Forward Controls Design 3 items
  21. Gear Head Works 1 item
  22. Geissele 1 item
  23. Griffin Armament 1 item
  24. HB Industries 1 item
  25. HERA ARMS 1 item
  26. James Madison Tactical (JMT) 1 item
  27. JP Enterprises Inc 2 items
  28. KNS Precision 2 items
  29. Krebs Customs 1 item
  30. Leitner-Wise 1 item
  31. Magpul Industries 21 items
  32. Mission First Tactical 1 item
  33. NEMO Arms 1 item
  34. Neverwear Springs 1 item
  35. Noveske 2 items
  36. Obsidian Arms 1 item
  37. Patriot Ordnance Factory (POF) 1 item
  38. Rainier Arms, LLC 3 items
  39. Rainier Industries 1 item
  40. Reptilia Corp 3 items
  41. Riflespeed 1 item
  42. Rise Armament 1 item
  43. Seekins Precision 1 item
  44. Sprinco (Tactical Springs) 4 items
  45. Strike Industries 11 items
  46. Tango Down 1 item
  47. Taran Tactical Innovations 1 item
  48. TruCalibre 1 item
  49. True North Concepts 4 items
  50. Underground Tactical 1 item
  51. V Seven Weapon Systems 5 items
  52. WMD Guns 4 items
Model
  1. CZ Scorpion 3 items
Mount
  1. M-LOK 14 items
  2. Other 1 item
  3. Picatinny 9 items
Option
  1. AR-10 2 items
  2. AR-15 9 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 4 items
  2. AK47/74 4 items
  3. CZ 3 items
Product Type
  1. Accessory 1 item
  2. Angled Grip 4 items
  3. Anti Walk Pins 5 items
  4. Bolt Catch 4 items
  5. Brace Strap 1 item
  6. Buffer 5 items
  7. Buffer Spring 2 items
  8. Cam Pin 1 item
  9. Charging Handle 1 item
  10. Cheek Riser 2 items
  11. Dust Cover 4 items
  12. End Plate 5 items
  13. Firing Pin 1 item
  14. Forearm Accesory 6 items
  15. Gas Block 1 item
  16. Gas Tube 4 items
  17. Grip Accessory 5 items
  18. Grip Module 1 item
  19. Grip Screw 1 item
  20. Handstop 7 items
  21. Lower Parts Kit 1 item
  22. Magazine 1 item
  23. Magazine Catch 2 items
  24. Magazine Release 5 items
  25. Parts Kit 2 items
  26. Pistol Grip 17 items
  27. Port Door 2 items
  28. Port Door Rod 3 items
  29. Rail Panel 4 items
  30. Rail Section 2 items
  31. Recoil Spring 1 item
  32. Retainer Pin 4 items
  33. Safety Selector 2 items
  34. Shim Set 2 items
  35. Sight Post 4 items
  36. Spring 5 items
  37. Stock Accessory 6 items
  38. Stock Adapter 1 item
  39. Take Down / Pivot Pins 3 items
  40. Trigger / Hammer Pins 2 items
  41. Trigger Guard 3 items
  42. Upper Parts Kit 1 item
  43. Vertical Grip 6 items
Rail Length
  1. 12" 2 items
Size
  1. Medium 1 item
  2. Large 1 item
  3. 3 Slot 2 items
  4. 5 Slot 2 items
  5. 7 Slot 1 item
  6. 9 Slot 3 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 102 items
  2. Out of stock 32 items
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