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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. 8.5" 1 item
  2. 10.5" 2 items
  3. 10.7" 1 item
  4. 12" 1 item
  5. 16" 7 items
  6. 18" 9 items
  7. 20" 3 items
  8. 22" 12 items
  9. 24" 1 item
Barrel Profile
  1. MK12 SPR 1 item
  2. Non-fluted 1 item
Caliber
  1. .22 ARC 2 items
  2. .223 Wylde 5 items
  3. .308 1 item
  4. .308 Win 7 items
  5. 300 Blackout 2 items
  6. 5.56X45 1 item
  7. 5.56 NATO 5 items
  8. 6.5 Creedmoor 5 items
  9. 6MM Creedmoor 10 items
Category
  1. Receiver Parts 25 items
  2. Barrels 33 items
  3. Muzzle Devices 1 item
  4. Bolt Parts 4 items
  5. Rifle Handguards 2 items
  6. Stocks & Braces 2 items
Color
Finish
  1. Cerakote 1 item
  2. Nitride 2 items
  3. Polished 11 items
  4. Satin 16 items
  5. Clear Hard Anodize 1 item
Gas Block Diameter
  1. .750" 11 items
  2. .875" 5 items
  3. .936" 1 item
Gas System Length
  1. Carbine 2 items
  2. Mid 3 items
  3. Intermediate 4 items
  4. Rifle 4 items
  5. Rifle +1 2 items
  6. Rifle +2 2 items
Height
  1. Absolute Co-Witness 1 item
Inside Diameter
  1. 1.45" 1 item
Manufacturer
  1. Aero Precision 2 items
  2. Angstadt Arms 1 item
  3. Battle Arms Development 1 item
  4. Bootleg 1 item
  5. Bravo Company MFG (BCM) 10 items
  6. Dead Foot Arms LLC 1 item
  7. Faxon Firearms 1 item
  8. Grey Birch MFG 1 item
  9. JP Enterprises Inc 2 items
  10. Knight’s Armament Company (KAC) 2 items
  11. Lantac 1 item
  12. Lewis Machine & Tool (LMT) 1 item
  13. Maxim Defense 1 item
  14. NEMO Arms 1 item
  15. Noveske 4 items
  16. Rainier Arms, LLC 31 items
  17. Sionics Weapon Systems 1 item
  18. V Seven Weapon Systems 4 items
  19. WOOX 1 item
Mount
  1. M-LOK 3 items
Option
  1. AR-9 1 item
  2. AR-10 1 item
  3. AR-15 6 items
  4. Remington 700 Short Action BDL 1 item
  5. Remington 700 Long Action BDL 1 item
  6. Sauer 100 1 item
  7. Glock 1 item
Platform
  1. AR-10/LR308 5 items
  2. AR-15 21 items
  3. Remington 700 8 items
  4. Ruger 1 item
  5. Ruger Precision Rifle 1 item
  6. Savage Small Shank 8 items
Product Type
  1. AR-10/LR308 Barrel 4 items
  2. AR-10 Handguard 1 item
  3. AR-10 Receiver Set 1 item
  4. AR-15 Barrel 11 items
  5. AR-15 Complete Lower Receiver 11 items
  6. AR-15 Partial Upper Receiver 3 items
  7. AR-15 Handguard 1 item
  8. AR-15 Receiver Set 4 items
  9. AR-15 Stripped Lower Receiver 1 item
  10. AR-15 Stripped Upper Receiver 1 item
  11. AR-9 Complete Lower Receiver 1 item
  12. Bolt-Action Barrel 18 items
  13. Bolt Carrier Group 4 items
  14. Chassis 2 items
  15. Complete Upper 1 item
  16. Muzzle Brake 1 item
  17. Stock 2 items
Rail Length
  1. 7" 1 item
  2. 9.5" 2 items
  3. 10" 1 item
  4. 12" 1 item
  5. 15" 1 item
  6. 16.5" 1 item
  7. 18" 1 item
Thread Pitch
  1. 1/2x28 (.22 cal) 12 items
  2. 3/4x24 1 item
  3. 5/8x24 (.30 cal) 24 items
Threaded
  1. Yes 1 item
  2. No 1 item
Twist Rate
  1. 1:7 8 items
  2. 1:7.5 12 items
  3. 1:8 8 items
  4. 1:10 7 items
Stock Status
  1. Out of stock 67 items Remove This Item
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