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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 $400.00 - $499.99 Remove This Item
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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" 8 items
  6. 18" 7 items
  7. 20" 3 items
  8. 22" 11 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 6 items
  5. 300 Blackout 2 items
  6. 5.56X45 1 item
  7. 5.56 NATO 5 items
  8. 6.5 Creedmoor 4 items
  9. 6MM Creedmoor 9 items
  10. 9mm 1 item
Category
  1. Receiver Parts 30 items
  2. Barrels 30 items
  3. Trigger Parts 1 item
  4. Muzzle Devices 1 item
  5. Bolt Parts 3 items
  6. Rifle Handguards 2 items
  7. Stocks & Braces 1 item
Color
Finish
  1. Cerakote 1 item
  2. Nitride 2 items
  3. Polished 10 items
  4. Satin 14 items
  5. Anodize 1 item
  6. Clear Hard Anodize 1 item
Gas Block Diameter
  1. .750" 11 items
  2. .875" 3 items
  3. .936" 1 item
Gas System Length
  1. Carbine 2 items
  2. Mid 3 items
  3. Intermediate 4 items
  4. Rifle 3 items
  5. Rifle +1 2 items
  6. Rifle +2 1 item
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. Arms Republic 1 item
  4. Battle Arms Development 1 item
  5. Blackout Defense 1 item
  6. Bootleg 1 item
  7. Bravo Company MFG (BCM) 10 items
  8. Dead Foot Arms LLC 1 item
  9. Faxon Firearms 1 item
  10. Geissele 1 item
  11. Grey Birch MFG 1 item
  12. JP Enterprises Inc 1 item
  13. Knight’s Armament Company (KAC) 2 items
  14. Lantac 1 item
  15. Lewis Machine & Tool (LMT) 1 item
  16. NEMO Arms 1 item
  17. Noveske 4 items
  18. Rainier Arms, LLC 28 items
  19. Sharps Bros 3 items
  20. Sionics Weapon Systems 1 item
  21. V Seven Weapon Systems 4 items
  22. WOOX 1 item
Mount
  1. M-LOK 5 items
Option
  1. AR-9 1 item
  2. AR-10 1 item
  3. AR-15 7 items
  4. Remington 700 Short Action BDL 1 item
  5. Remington 700 Long Action BDL 1 item
  6. Sauer 100 1 item
  7. 9mm 1 item
  8. Glock 1 item
Platform
  1. AR-10/LR308 3 items
  2. AR-15 22 items
  3. Remington 700 7 items
  4. Ruger 2 items
  5. Ruger Precision Rifle 1 item
  6. Savage Small Shank 8 items
Price
  1. $400.00 - $409.99 30 items
  2. $410.00 - $419.99 6 items
  3. $420.00 - $429.99 7 items
  4. $430.00 - $439.99 9 items
  5. $440.00 - $449.99 2 items
  6. $450.00 - $459.99 4 items
  7. $460.00 - $469.99 1 item
  8. $470.00 - $479.99 4 items
  9. $480.00 - $489.99 2 items
  10. $490.00 and above 3 items
Product Type
  1. AR-10/LR308 Barrel 2 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 4 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 17 items
  13. Bolt Carrier Group 3 items
  14. Chassis 5 items
  15. Complete Upper 2 items
  16. Muzzle Brake 1 item
  17. Stock 1 item
  18. Trigger 1 item
Rail Length
  1. 7" 1 item
  2. 9.5" 2 items
  3. 10" 1 item
  4. 10.5" 1 item
  5. 12" 1 item
  6. 13" 1 item
  7. 14" 3 items
  8. 15" 3 items
  9. 16.5" 1 item
  10. 18" 1 item
Thread Pitch
  1. 1/2x28 (.22 cal) 13 items
  2. 3/4x24 1 item
  3. 5/8x24 (.30 cal) 21 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 6 items
  4. 1:10 7 items
Stock Status
  1. Out of stock 68 items Remove This Item
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