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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 $300.00 - $399.99 Remove This Item
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Barrel Length
  1. 6.5" 1 item
  2. 8" 1 item
  3. 10.5" 1 item
  4. 11.5" 1 item
  5. 12.5" 1 item
  6. 14.5" 1 item
  7. 16" 2 items
  8. 18" 4 items
  9. 20" 2 items
  10. 22" 1 item
Barrel Profile
  1. MK12 SPR 1 item
Caliber
  1. .22 ARC 2 items
  2. .223 Wylde 2 items
  3. 300 Blackout 1 item
  4. 5.56 NATO 5 items
  5. 6.5 Creedmoor 1 item
  6. 6.5 Grendel 1 item
  7. 6MM Creedmoor 1 item
  8. 8.6 Blackout 3 items
Category
  1. Receiver Parts 14 items
  2. Barrels 15 items
  3. Trigger Parts 5 items
  4. Bolt Parts 3 items
  5. Rifle Handguards 7 items
  6. Stocks & Braces 4 items
Color
Configuration
  1. Flat 1 item
Finish
  1. Black 1 item
  2. Cerakote 1 item
  3. Nitride 6 items
  4. Polished 1 item
  5. Satin 3 items
  6. Titanium Nitride (TiN) 1 item
Gas Block Diameter
  1. .750" 10 items
  2. .875" 1 item
Gas System Length
  1. Carbine 2 items
  2. Mid 3 items
  3. Rifle 5 items
  4. Rifle +2 1 item
Manufacturer
  1. Aero Precision 1 item
  2. Battle Arms Development 2 items
  3. Bravo Company MFG (BCM) 2 items
  4. Centurion Arms 2 items
  5. Chisel Machining 1 item
  6. Daniel Defense 2 items
  7. Dead Foot Arms LLC 1 item
  8. Faxon Firearms 4 items
  9. Fortis MFG 2 items
  10. Geissele 5 items
  11. JP Enterprises Inc 1 item
  12. Knight’s Armament Company (KAC) 2 items
  13. Lantac 3 items
  14. Midwest Industries 2 items
  15. Noveske 2 items
  16. Rainier Arms, LLC 8 items
  17. Sharps Bros 4 items
  18. Sons of Liberty Gun Works 1 item
  19. Triggertech 1 item
  20. Troy Industries 1 item
  21. V Seven Weapon Systems 2 items
Model
  1. FNH Scar 1 item
Mount
  1. M-LOK 4 items
  2. Picatinny 3 items
Option
  1. AR-9 1 item
  2. AR-10 1 item
  3. AR-15 8 items
  4. FN 509 1 item
  5. FNH 1 item
Platform
  1. AR-10/LR308 2 items
  2. AR-15 14 items
  3. FNH 1 item
  4. Remington 700 1 item
  5. Savage Small Shank 2 items
Product Type
  1. AR-10/LR308 Barrel 2 items
  2. AR-10 Stripped Upper Receiver 1 item
  3. AR-15 Barrel 10 items
  4. AR-15 Complete Lower Receiver 4 items
  5. AR-15 Handguard 5 items
  6. AR-15 Receiver Set 2 items
  7. AR-15 Stripped Lower Receiver 3 items
  8. AR-15 Stripped Upper Receiver 1 item
  9. AR-9 Receiver Set 1 item
  10. Bolt-Action Barrel 3 items
  11. Bolt Carrier Group 3 items
  12. Brace 1 item
  13. Chassis 1 item
  14. Handguard 2 items
  15. Iron Sight 1 item
  16. Parts Kit 1 item
  17. Stock 3 items
  18. Trigger 5 items
Rail Length
  1. 6.25" 1 item
  2. 9" 1 item
  3. 9.3" 1 item
  4. 11.5" 1 item
  5. 13" 1 item
  6. 13.5" 1 item
  7. 13.625" 1 item
  8. 15" 3 items
  9. 17" 1 item
Thread Pitch
  1. 1/2x28 (.22 cal) 8 items
  2. 5/8x24 (.30 cal) 7 items
Twist Rate
  1. 1:3 3 items
  2. 1:7 7 items
  3. 1:7.5 1 item
  4. 1:8 4 items
Stock Status
  1. Out of stock 49 items Remove This Item
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