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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. 16" 2 items
Caliber
  1. .223/5.56 1 item
  2. .308 1 item
  3. 300 Blackout 1 item
Category
  1. Parts & Kits 12 items
  2. Trigger Parts 2 items
  3. Gas Systems 2 items
  4. Muzzle Devices 1 item
  5. Bolt Parts 1 item
  6. Grips 7 items
  7. Rifle Handguards 3 items
  8. Stocks & Braces 1 item
Color
Configuration
  1. M-LOK 2 items
  2. .936 DIA 1 item
Finish
  1. Black 1 item
  2. Quench Polish Quench (QPQ) 1 item
Gas Block Diameter
  1. .750" 1 item
Gas System Length
  1. Pistol 2 items
Height
  1. Absolute Co-Witness 1 item
Manufacturer
  1. Aero Precision 1 item
  2. Apex Tactical Specialties 1 item
  3. Ascalon Arms 1 item
  4. B5 Systems 1 item
  5. Ballistic Advantage 1 item
  6. Battle Arms Development 3 items
  7. Cross Machine Tool (CMT) 1 item
  8. Drew Meyers Defense 2 items
  9. Ergo Grips 1 item
  10. Fortis MFG 1 item
  11. Forward Controls Design 1 item
  12. Geissele 1 item
  13. HERA ARMS 1 item
  14. Kalashnikov USA 1 item
  15. Mag-Pod 1 item
  16. Magpul Industries 4 items
  17. Next Level Armament 1 item
  18. Noveske 1 item
  19. Patriot Ordnance Factory (POF) 1 item
  20. Strike Industries 1 item
  21. V Seven Weapon Systems 4 items
Model
  1. CZ Scorpion 3 items
Mount
  1. M-LOK 3 items
  2. Picatinny 3 items
Option
  1. AR-10 1 item
  2. AR-15 5 items
  3. CZ 3 items
  4. Non-Adjustable 2 items
Platform
  1. AR-15 1 item
  2. CZ 3 items
Product Type
  1. Bolt Catch 1 item
  2. Cam Pin 1 item
  3. End Plate 1 item
  4. Gas Block 2 items
  5. Grip Accessory 1 item
  6. Handguard 1 item
  7. Handstop 1 item
  8. Magazine Release 2 items
  9. Muzzle Device Accessory 1 item
  10. Parts Kit 1 item
  11. Pistol Grip 4 items
  12. Port Door Rod 2 items
  13. Rail Cover 2 items
  14. Safety Selector 1 item
  15. Take Down / Pivot Pins 3 items
  16. Trigger / Hammer Pins 1 item
  17. Trigger Guard 1 item
  18. Trigger Spring 1 item
  19. Upper Parts Kit 1 item
  20. Vertical Grip 2 items
Rail Length
  1. 12" 2 items
Size
  1. 9 Slot 2 items
Thread Pitch
  1. 1/2x28 (.22 cal) 1 item
Stock Status
  1. Out of stock 29 items Remove This Item
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