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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. 7" 1 item
  2. 18" 2 items
Caliber
  1. 9mm 1 item
Category
  1. Receiver Parts 1 item
  2. Parts & Kits 27 items
  3. Buffer Systems 4 items
  4. Trigger Parts 3 items
  5. Gas Systems 7 items
  6. Muzzle Devices 4 items
  7. Bolt Parts 3 items
  8. Grips 27 items
  9. Charging Handles 1 item
  10. Rifle Handguards 9 items
  11. Stocks & Braces 8 items
  12. MILSPEC Parts 2 items
Color
Configuration
  1. AR-15 1 item
  2. M-LOK 1 item
  3. Right Hand 1 item
  4. .625 DIA 1 item
  5. .750 DIA 1 item
  6. .800 DIA 1 item
  7. .875 DIA 1 item
  8. .936 DIA 1 item
Finish
  1. Black 2 items
  2. Melonite 1 item
  3. Red 1 item
  4. Anodize 1 item
Gas Block Diameter
  1. .625" 1 item
  2. .750" 5 items
  3. .875" 1 item
  4. .936" 1 item
Gas System Length
  1. Pistol 1 item
  2. Intermediate 2 items
Manufacturer
  1. A3 Tactical 1 item
  2. Arisaka 4 items
  3. Arms Republic 3 items
  4. Ascalon Arms 2 items
  5. B5 Systems 1 item
  6. Battle Arms Development 1 item
  7. Blitzkrieg Components 2 items
  8. Bravo Company MFG (BCM) 2 items
  9. Drew Meyers Defense 2 items
  10. Driven Arms Co. 9 items
  11. Elftmann Tactical 1 item
  12. Emissary Development 3 items
  13. Faxon Firearms 1 item
  14. Fortis MFG 5 items
  15. Forward Controls Design 12 items
  16. Gear Head Works 1 item
  17. HB Industries 2 items
  18. HERA ARMS 2 items
  19. JK Armament 1 item
  20. JP Enterprises Inc 3 items
  21. KAK Industries 1 item
  22. Kinetic Development Group 1 item
  23. KNS Precision 2 items
  24. Kratos Design Group 1 item
  25. Lantac 1 item
  26. LUTH-AR 1 item
  27. Magpul Industries 7 items
  28. Next Level Armament 1 item
  29. Primary Weapon Systems 1 item
  30. Q, LLC 2 items
  31. Rainier Arms, LLC 2 items
  32. Rainier Industries 1 item
  33. Reptilia Corp 1 item
  34. RogueOps 1 item
  35. Sharps Bros 1 item
  36. Strike Industries 1 item
  37. Superlative Arms 1 item
  38. TruCalibre 2 items
  39. Tyrant Designs 1 item
  40. V Seven Weapon Systems 5 items
  41. VLTOR 1 item
  42. White Label Armory 1 item
Model
  1. CZ Scorpion 3 items
Mount
  1. M-LOK 11 items
  2. Picatinny 9 items
Option
  1. AK-47/74 2 items
  2. AR-10 2 items
  3. AR-15 12 items
  4. Standard 1 item
  5. Bull's Eye 1 item
  6. Vertical Lines 1 item
  7. Minimal 1 item
  8. 1.125-28 TPI 3 Lug/Booster Adaptor 1 item
  9. 1.180-24 TPI 3 Lug/Booster Adaptor 1 item
  10. CZ 1 item
  11. Holed 1 item
  12. Profile 1 item
  13. Non-Adjustable 4 items
Platform
  1. AR-15 9 items
  2. AK47/74 1 item
  3. CZ 3 items
Product Type
  1. Accessory 3 items
  2. Adapter Plate 1 item
  3. AK Handguard 1 item
  4. Angled Grip 3 items
  5. AR-15 Charging Handle 1 item
  6. AR-15 Stripped Upper Receiver 1 item
  7. Bolt Catch 2 items
  8. Buffer 1 item
  9. Buffer Tube 2 items
  10. Castle Nut 1 item
  11. Castle Nut / End Plate 2 items
  12. Compensator 1 item
  13. Dust Cover 1 item
  14. Firing Pin 2 items
  15. Flash Hider 1 item
  16. Forearm Accesory 2 items
  17. Forward Assist 3 items
  18. Gas Block 6 items
  19. Handguard 2 items
  20. Handstop 13 items
  21. Lower Parts Kit 4 items
  22. Magazine Catch 2 items
  23. Magazine Release 1 item
  24. Muzzle Device Accessory 2 items
  25. Parts Kit 1 item
  26. Pistol Grip 10 items
  27. Rail Adapter 1 item
  28. Rail Panel 1 item
  29. Safety Selector 2 items
  30. Sight Post 2 items
  31. Spring 1 item
  32. Stock 4 items
  33. Stock Accessory 3 items
  34. Stock Adapter 2 items
  35. Take Down / Pivot Pins 7 items
  36. Trigger 2 items
  37. Vertical Grip 2 items
Rail Length
  1. 7.3" 1 item
  2. 7.8" 1 item
  3. 12" 2 items
  4. 12.6" 1 item
Size
  1. 3" 1 item
  2. 6" 1 item
  3. 5 Slot 1 item
  4. 9 Slot 1 item
Thread Pitch
  1. 1/2x28 (9mm) 1 item
  2. 1/2x28 (.22 cal) 2 items
Stock Status
  1. In stock 92 items Remove This Item
  2. Out of stock 4 items
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