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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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  8. Ballistic Advantage Modern Series .308 Rifle Barrel-20
    Ballistic Advantage Modern Series .308 Rifle Barrel-20
    $237.50
    Out of stock
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  9. Ballistic Advantage Premium Series 416R SS 223 Wylde 18" SPR Fluted
    Ballistic Advantage Premium Series 416R SS 223 Wylde 18" SPR Fluted
    $256.50
    Out of stock
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  10. Ballistic Advantage Premium Series 416R SS 6MM ARC Barrel - 20" DMR
    Ballistic Advantage Premium Series 416R SS 6MM ARC Barrel - 20" DMR
    $261.25
    Out of stock
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  11. Faxon Firearms PENCIL .308 WIN
    Faxon Firearms PENCIL .308 WIN
    Out of stock
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  12. Faxon Firearms Gunner 5.56 NATO AR-15 QPQ Barrel - 20"
    Faxon Firearms Gunner 5.56 NATO AR-15 QPQ Barrel - 20"
    $189.05
    Out of stock
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  13. Faxon Firearms AR-15 Match Series .223 Wylde, 416R, QPQ, 5R Flame Barrel - 20
    Faxon Firearms AR-15 Match Series .223 Wylde, 416R, QPQ, 5R Flame Barrel - 20
    $308.75
    Out of stock
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  14. Faxon Firearms 6.5 Creedmoor 416-R Stainless Fluted Barrel MATCH SERIES - 20"
    Faxon Firearms 6.5 Creedmoor 416-R Stainless Fluted Barrel MATCH SERIES - 20"
    $376.28
    Out of stock
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  15. Lantac NITRIDED GAS TUBE
    Lantac NITRIDED GAS TUBE
    Out of stock
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  16. Rainier Arms Ultramatch MOD2 .223 Wylde AR-15 Barrel - 18" Nitride
    Rainier Arms Ultramatch MOD2 .223 Wylde AR-15 Barrel - 18" Nitride
    $400.00
    Out of stock
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Items 65-80 of 86

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  1. Gas System Length Rifle Remove This Item
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Barrel Length
  1. 16" 11 items
  2. 18" 38 items
  3. 20" 21 items
  4. 22" 4 items
  5. 24" 4 items
Barrel Profile
  1. Dissipator 1 item
  2. Lightweight 2 items
  3. M110 1 item
  4. M16A1 1 item
  5. MK12 SPR 5 items
Caliber
  1. .22 ARC 2 items
  2. .223 Wylde 14 items
  3. .308 1 item
  4. .308 Win 14 items
  5. 5.56 NATO 5 items
  6. 6mm ARC 5 items
  7. 6.5 Creedmoor 17 items
  8. 6.5 Grendel 5 items
  9. 6MM Creedmoor 1 item
  10. 7.62x51 2 items
Category
  1. Receiver Parts 1 item
  2. Barrels 51 items
  3. Rifle Barrels 25 items
  4. Gas Systems 9 items
  5. Rifle Handguards 2 items
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Configuration
  1. Clamp on Piston Block 1 item
  2. Solid Piston Block 1 item
  3. .625 DIA 1 item
  4. .750 DIA 9 items
  5. .875 DIA 1 item
  6. .936 DIA 2 items
Finish
  1. Bead Blast 1 item
  2. Nitride 21 items
  3. Polished 10 items
  4. Satin 21 items
  5. Quench Polish Quench (QPQ) 1 item
Gas Block Diameter
  1. .625" 6 items
  2. .750" 41 items
  3. .875" 11 items
  4. .936" 2 items
Inside Diameter
  1. 1.75" 1 item
Is Firearms?
  1. No 86 items
Manufacturer
  1. Ballistic Advantage 9 items
  2. Boss Barrels 1 item
  3. Bravo Company MFG (BCM) 1 item
  4. Christensen Arms 3 items
  5. Faxon Firearms 12 items
  6. Lantac 1 item
  7. Lewis Machine & Tool (LMT) 1 item
  8. Precision Reflex Inc 1 item
  9. Rainier Arms, LLC 49 items
  10. Riflespeed 1 item
  11. Spinta Precision 1 item
  12. Superlative Arms 4 items
  13. V Seven Weapon Systems 2 items
Mount
  1. Picatinny 1 item
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  1. AR-10/LR308 23 items
  2. AR-15 29 items
Price
  1. $0.00 - $99.99 5 items
  2. $100.00 - $199.99 5 items
  3. $200.00 - $299.99 27 items
  4. $300.00 - $399.99 23 items
  5. $400.00 - $499.99 18 items
  6. $600.00 - $699.99 2 items
  7. $700.00 - $799.99 4 items
  8. $800.00 and above 2 items
Product Type
  1. AR-10/LR308 Barrel 23 items
  2. AR-15 Barrel 28 items
  3. AR-15 Handguard 2 items
  4. AR-15 Upper Receiver Group 1 item
  5. Barrel 23 items
  6. Gas Tube 5 items
  7. Piston System 4 items
Rail Length
  1. 9.5" 1 item
  2. 12.5" 1 item
  3. 13.25" 1 item
Thread Pitch
  1. 1/2x28 21 items
  2. 3/4x24 1 item
  3. 5/8x24 38 items
Threaded
  1. Yes 2 items
Twist Rate
  1. 1:7 5 items
  2. 1:7.5 13 items
  3. 1:8 25 items
  4. 1:10 16 items
Stock Status
  1. In stock 71 items
  2. Out of stock 15 items
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