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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. Platform AR-15 Remove This Item
  2. Price $100.00 - $199.99 Remove This Item
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Barrel Length
  1. 6" 2 items
  2. 7.5" 2 items
  3. 8" 1 item
  4. 8.3" 1 item
  5. 8.5" 2 items
  6. 9" 1 item
  7. 10.5" 4 items
  8. 11.5" 2 items
  9. 12.5" 2 items
  10. 13.9" 1 item
  11. 16" 4 items
  12. 18" 1 item
  13. 20" 2 items
Barrel Profile
  1. Dissipator 2 items
  2. MK12 SPR 1 item
Caliber
  1. .223 Wylde 1 item
  2. 300 Blackout 8 items
  3. 5.56 NATO 13 items
  4. 9mm 5 items
Category
  1. Receiver Parts 7 items
  2. Barrels 25 items
  3. Bolt Parts 2 items
  4. Charging Handles 2 items
  5. Rifle Handguards 2 items
Color
Finish
  1. Cerakote 3 items
  2. Melonite 1 item
  3. Nitride 11 items
  4. Phosphate 1 item
  5. Anodize 2 items
  6. Quench Polish Quench (QPQ) 1 item
Gas Block Diameter
  1. .625" 2 items
  2. .750" 16 items
Gas System Length
  1. Blowback 4 items
  2. Pistol 7 items
  3. Carbine 6 items
  4. Mid 1 item
  5. Rifle 4 items
Inside Diameter
  1. 1.3" 1 item
  2. 1.315" 1 item
Manufacturer
  1. Aero Precision 6 items
  2. Angstadt Arms 1 item
  3. Ballistic Advantage 8 items
  4. Battle Arms Development 1 item
  5. Centurion Arms 1 item
  6. Cross Machine Tool (CMT) 1 item
  7. Faxon Firearms 10 items
  8. Geissele 2 items
  9. NEMO Arms 1 item
  10. Rainier Arms, LLC 3 items
  11. Sons of Liberty Gun Works 1 item
  12. Spinta Precision 2 items
  13. VKTR Industries 1 item
Mount
  1. M-LOK 2 items
  2. Picatinny 1 item
Option
  1. AR-15 4 items
Product Type
  1. AR-15 Barrel 25 items
  2. AR-15 Charging Handle 2 items
  3. AR-15 Handguard 2 items
  4. AR-15 Stripped Lower Receiver 6 items
  5. AR-15 Stripped Upper Receiver 1 item
  6. Bolt 1 item
  7. Bolt Carrier Group 1 item
  8. Charging Handle 1 item
Rail Length
  1. 7" 2 items
  2. 9" 1 item
  3. 12" 1 item
  4. 12.5" 1 item
  5. 15" 2 items
Thread Pitch
  1. 1/2x28 (9mm) 4 items
  2. 1/2x28 (.22 cal) 12 items
  3. 1/2x36 1 item
  4. 5/8x24 (.30 cal) 8 items
Twist Rate
  1. 1:5 2 items
  2. 1:7 10 items
  3. 1:8 8 items
  4. 1:10 5 items
Stock Status
  1. Out of stock 38 items Remove This Item
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