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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. 4" 1 item
  2. 8.3" 1 item
  3. 8.5" 1 item
  4. 10" 2 items
  5. 10.5" 5 items
  6. 10.7" 1 item
  7. 11.5" 1 item
  8. 12" 3 items
  9. 12.5" 2 items
  10. 16" 21 items
  11. 18" 25 items
  12. 20" 13 items
  13. 22" 22 items
  14. 24" 4 items
  15. 26" 2 items
Barrel Profile
  1. MK12 SPR 1 item
  2. Non-fluted 1 item
Caliber
  1. .22 ARC 2 items
  2. .223 Wylde 11 items
  3. .308 1 item
  4. .308 Win 25 items
  5. 300 Blackout 8 items
  6. 300 Norma Mag 1 item
  7. 338 Lapua 1 item
  8. 5.56X45 2 items
  9. 5.56 NATO 6 items
  10. 6mm ARC 6 items
  11. 6.5 Creedmoor 17 items
  12. 6.5 Grendel 6 items
  13. 6.5 PRC 2 items
  14. 6MM Creedmoor 14 items
  15. 8.6 Blackout 1 item
  16. 9mm 3 items
Category
  1. Receiver Parts 43 items
  2. Barrels 98 items
  3. Trigger Parts 1 item
  4. Muzzle Devices 1 item
  5. Bolt Parts 9 items
  6. Grips 1 item
  7. Rifle Handguards 3 items
  8. Stocks & Braces 7 items
Color
Configuration
  1. Silent Captured Spring 9mm 1 item
Finish
  1. Black 1 item
  2. Cerakote 1 item
  3. Nitride 4 items
  4. Polished 39 items
  5. Satin 43 items
  6. Anodize 4 items
  7. Clear Hard Anodize 3 items
Gas Block Diameter
  1. .750" 36 items
  2. .875" 13 items
  3. .936" 2 items
Gas System Length
  1. Blowback 1 item
  2. Pistol 6 items
  3. Carbine 4 items
  4. Mid 7 items
  5. Intermediate 7 items
  6. Rifle 18 items
  7. Rifle +1 4 items
  8. Rifle +2 6 items
Height
  1. Absolute Co-Witness 1 item
Inside Diameter
  1. 1.08" 1 item
  2. 1.45" 1 item
Manufacturer
  1. 21st Tec 4 items
  2. Aero Precision 3 items
  3. Angstadt Arms 1 item
  4. Arms Republic 1 item
  5. Battle Arms Development 1 item
  6. Blackout Defense 1 item
  7. Bootleg 1 item
  8. Boss Barrels 3 items
  9. Bravo Company MFG (BCM) 10 items
  10. Daniel Defense 1 item
  11. Dead Foot Arms LLC 3 items
  12. Faxon Firearms 1 item
  13. Geissele 1 item
  14. Grey Birch MFG 5 items
  15. JP Enterprises Inc 6 items
  16. Knight’s Armament Company (KAC) 2 items
  17. KNS Precision 1 item
  18. Lantac 1 item
  19. Lewis Machine & Tool (LMT) 2 items
  20. Maxim Defense 4 items
  21. NEMO Arms 1 item
  22. Next Level Armament 1 item
  23. Noveske 6 items
  24. Rainier Arms, LLC 89 items
  25. Sharps Bros 7 items
  26. Sionics Weapon Systems 1 item
  27. Stern Defense 1 item
  28. V Seven Weapon Systems 4 items
  29. WOOX 1 item
Mount
  1. M-LOK 6 items
Option
  1. AR-9 1 item
  2. AR-10 1 item
  3. AR-15 9 items
  4. Remington 700 Short Action BDL 1 item
  5. Remington 700 Long Action BDL 1 item
  6. Sauer 100 1 item
  7. JP Silent Captured Spring - Standard 1 item
  8. JP Silent Captured Spring - Heavy 1 item
  9. JP Silent Captured Spring - 9mm 1 item
  10. Buffer & Spring - Standard 1 item
  11. Buffer & Spring - H1 1 item
  12. 9mm 1 item
  13. Glock 1 item
  14. Remington 1 item
Platform
  1. AR-10/LR308 17 items
  2. AR-15 51 items
  3. CZ 1 item
  4. Remington 700 12 items
  5. Ruger 4 items
  6. Ruger Precision Rifle 12 items
  7. Savage Small Shank 13 items
  8. Sig Cross 4 items
Price
  1. $400.00 - $409.99 80 items
  2. $410.00 - $419.99 9 items
  3. $420.00 - $429.99 9 items
  4. $430.00 - $439.99 13 items
  5. $440.00 - $449.99 4 items
  6. $450.00 - $459.99 23 items
  7. $460.00 - $469.99 4 items
  8. $470.00 - $479.99 8 items
  9. $480.00 - $489.99 2 items
  10. $490.00 and above 11 items
Product Type
  1. AR-10/LR308 Barrel 15 items
  2. AR-10 Handguard 1 item
  3. AR-10 Receiver Set 2 items
  4. AR-15 Barrel 37 items
  5. AR-15 Complete Lower Receiver 12 items
  6. AR-15 Partial Upper Receiver 4 items
  7. AR-15 Handguard 2 items
  8. AR-15 Receiver Set 6 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. AR-9 Upper Receiver 1 item
  13. Bolt 2 items
  14. Bolt-Action Barrel 46 items
  15. Bolt Carrier Group 7 items
  16. Chassis 13 items
  17. Complete Upper 2 items
  18. Grip Accessory 1 item
  19. Muzzle Brake 1 item
  20. Stock 5 items
  21. Stock Accessory 1 item
  22. Trigger 1 item
Rail Length
  1. 5" 1 item
  2. 7" 1 item
  3. 9.5" 2 items
  4. 10" 4 items
  5. 10.5" 1 item
  6. 12" 1 item
  7. 12.43" 1 item
  8. 13" 1 item
  9. 14" 5 items
  10. 15" 3 items
  11. 16.5" 1 item
  12. 18" 1 item
Thread Pitch
  1. 1/2x28 (9mm) 1 item
  2. 1/2x28 (.22 cal) 20 items
  3. 3/4x24 1 item
  4. 5/8x24 (.30 cal) 76 items
  5. M18x1.5 1 item
Threaded
  1. Yes 1 item
  2. No 1 item
Twist Rate
  1. 1:3 1 item
  2. 1:7 18 items
  3. 1:7.5 25 items
  4. 1:8 26 items
  5. 1:10 27 items
Stock Status
  1. In stock 95 items
  2. Out of stock 68 items
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