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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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  2. Lewis Machine & Tool .308 Piston Bolt Carrier Group
    Lewis Machine & Tool .308 Piston Bolt Carrier Group
    $685.80
    Out of stock
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  1. Platform AR-10/LR308 Remove This Item
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Barrel Length
  1. 8" 2 items
  2. 10.3" 1 item
  3. 10.5" 1 item
  4. 12" 3 items
  5. 12.5" 2 items
  6. 13.5" 1 item
  7. 16" 14 items
  8. 18" 12 items
  9. 20" 14 items
  10. 20.5" 1 item
  11. 22" 10 items
  12. 24" 4 items
  13. 26" 2 items
Barrel Profile
  1. M110 1 item
  2. Non-fluted 1 item
Caliber
  1. .308 3 items
  2. .308 Win 29 items
  3. 6.5 Creedmoor 22 items
  4. 6MM Creedmoor 5 items
  5. 7.62mm 2 items
  6. 7.62x39 1 item
  7. 7.62x51 5 items
  8. 8.6 Blackout 5 items
Category
  1. Receiver Parts 6 items
  2. Parts & Kits 1 item
  3. Barrels 66 items
  4. Buffer Systems 1 item
  5. Trigger Parts 2 items
  6. Muzzle Devices 1 item
  7. Bolt Parts 3 items
  8. Charging Handles 4 items
Color
Configuration
  1. AR-10 1 item
  2. Curved 2 items
  3. Flat 1 item
  4. Straight 1 item
Finish
  1. Carbon Fiber 3 items
  2. Cerakote 1 item
  3. DLC 1 item
  4. FDE 1 item
  5. Nitride 24 items
  6. Polished 8 items
  7. Satin 19 items
  8. Anodize 1 item
Gas Block Diameter
  1. .750" 32 items
  2. .875" 19 items
  3. .936" 6 items
Gas System Length
  1. Pistol 3 items
  2. Carbine 4 items
  3. Mid 6 items
  4. Intermediate 2 items
  5. Rifle 36 items
  6. Rifle +2 10 items
Manufacturer
  1. Aero Precision 3 items
  2. Ballistic Advantage 7 items
  3. Boss Barrels 1 item
  4. Christensen Arms 3 items
  5. Faxon Firearms 11 items
  6. Fortis MFG 2 items
  7. Forward Controls Design 1 item
  8. JL Billet 1 item
  9. JP Enterprises Inc 3 items
  10. Knight’s Armament Company (KAC) 1 item
  11. Lewis Machine & Tool (LMT) 8 items
  12. Maxim Defense 1 item
  13. Rainier Arms, LLC 38 items
  14. Rainier Industries 1 item
  15. Triggertech 2 items
  16. V Seven Weapon Systems 1 item
Mount
  1. Picatinny 1 item
Option
  1. AR-10 3 items
  2. Dimpled 1 item
  3. Serrated 1 item
Price
  1. $0.00 - $999.99 82 items
  2. $1,000.00 and above 2 items
Product Type
  1. AR-10/LR308 Barrel 66 items
  2. AR-10 / LR 308 Charging Handle 2 items
  3. AR-10 Complete Upper Receiver 1 item
  4. AR-10 Partial Upper Receiver 1 item
  5. AR-10 Receiver Set 2 items
  6. AR-10 Stripped Lower Receiver 1 item
  7. AR-10 Stripped Upper Receiver 1 item
  8. Bolt 2 items
  9. Bolt Carrier Group 1 item
  10. Bolt Catch 1 item
  11. Buffer Spring 1 item
  12. Charging Handle 2 items
  13. Muzzle Brake 1 item
  14. Trigger 2 items
Rail Length
  1. 12.75" 1 item
Thread Pitch
  1. 3/4x24 1 item
  2. 5/8x24 (.30 cal) 57 items
  3. M18x1.5 5 items
Threaded
  1. Yes 2 items
Twist Rate
  1. 1:3 5 items
  2. 1:8 28 items
  3. 1:10 32 items
  4. 1:11.25 1 item
Stock Status
  1. In stock 67 items
  2. Out of stock 17 items
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