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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. Rainier Arms Ultramatch MOD2 Remington 700 .308 Win Bolt-Action Barrel - 20" Polished
    Rainier Arms Ultramatch MOD2 Remington 700 .308 Win Bolt-Action Barrel - 20" Polished
    $400.00
    Out of stock
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  2. Rainier Arms Ultramatch MOD2 Remington 700 6.5 Creedmoor Bolt-Action Barrel - 22" Satin
    Rainier Arms Ultramatch MOD2 Remington 700 6.5 Creedmoor Bolt-Action Barrel - 22" Satin
    $400.00
    Out of stock
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  3. Rainier Arms Ultramatch MOD2 Remington 700 6mm Creedmoor Bolt-Action Barrel - 22" Satin
    Rainier Arms Ultramatch MOD2 Remington 700 6mm Creedmoor Bolt-Action Barrel - 22" Satin
    $400.00
    Out of stock
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  4. Rainier Arms Ultramatch MOD2 Remington 700 6mm Creedmoor Bolt-Action Barrel - 22" Polished
    Rainier Arms Ultramatch MOD2 Remington 700 6mm Creedmoor Bolt-Action Barrel - 22" Polished
    $400.00
    Out of stock
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  5. Blackout Defense Quantum Mark 2 AR15 Upper And Handguard Set
    Blackout Defense Quantum Mark 2 AR15 Upper And Handguard Set
    Out of stock
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  6. Rainier Arms Ultramatch MOD2 6mm Creedmoor AR-10/LR308 Barrel - 22" Satin
    Rainier Arms Ultramatch MOD2 6mm Creedmoor AR-10/LR308 Barrel - 22" Satin
    $450.00
    Out of stock
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  7. Knight's Armament Company (KAC) RAS AR-15 Free Float QUAD Handguard - 12"
    Knight's Armament Company (KAC) RAS AR-15 Free Float QUAD Handguard - 12"
    $450.00
    Out of stock
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  8. JP Enterprises LARGE FRAME LMOS Bolt Carrier Group w/ High Pressure .308 Bolt
    JP Enterprises LARGE FRAME LMOS Bolt Carrier Group w/ High Pressure .308 Bolt
    $479.75
    Out of stock
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  11. JP Enterprises Full Mass Operating Sys. Carrier GrP/ w High Pressure .308 Enhanced Bolt
    JP Enterprises Full Mass Operating Sys. Carrier GrP/ w High Pressure .308 Enhanced Bolt
    $479.75
    Out of stock
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  12. Rainier Arms UltraMatch MOD2 6mm ARC AR-15 Barrel - 18" Satin
    Rainier Arms UltraMatch MOD2 6mm ARC AR-15 Barrel - 18" Satin
    $400.00
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  13. Noveske SPR 5.56MM Barrel - 18
    Noveske SPR 5.56MM Barrel - 18
    $437.00
    Out of stock
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  14. Noveske Recon Stainless Lo-Pro Gas Block Barrel 5.56 - 16"
    Noveske Recon Stainless Lo-Pro Gas Block Barrel 5.56 - 16"
    $418.00
    Out of stock
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  15. Noveske N4 Light 5.56MM Barrel - 10.5 LP
    Noveske N4 Light 5.56MM Barrel - 10.5 LP
    $427.50
    Out of stock
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  16. Rainier Arms Ultramatch MOD2 Savage Small Shank 6mm Creedmoor Bolt-Action Barrel - 18" Satin
    Rainier Arms Ultramatch MOD2 Savage Small Shank 6mm Creedmoor Bolt-Action Barrel - 18" Satin
    $400.00
    Out of stock
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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" 6 items
  6. 10.7" 1 item
  7. 11.5" 1 item
  8. 12" 3 items
  9. 12.5" 4 items
  10. 16" 22 items
  11. 18" 25 items
  12. 20" 13 items
  13. 22" 22 items
  14. 24" 4 items
  15. 26" 2 items
Barrel Profile
  1. Non-fluted 3 items
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 8 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. 7.62x51 1 item
  16. 9mm 3 items
Category
  1. Receiver Parts 43 items
  2. Barrels 92 items
  3. Rifle Barrels 7 items
  4. Trigger Parts 2 items
  5. Bolt Parts 9 items
  6. Grips 1 item
  7. Rifle Handguards 4 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 3 items
  4. Polished 39 items
  5. Satin 43 items
  6. Anodize 4 items
  7. Clear Hard Anodize 3 items
Gas Block Diameter
  1. .750" 34 items
  2. .875" 13 items
  3. .936" 2 items
Gas System Length
  1. Blowback 1 item
  2. Pistol 6 items
  3. Carbine 6 items
  4. Mid 7 items
  5. Intermediate 5 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
Is Firearms?
  1. No 163 items
Manufacturer
  1. 21st Tec 4 items
  2. Aero Precision 3 items
  3. Angstadt Arms 2 items
  4. Arms Republic 1 item
  5. Battle Arms Development 1 item
  6. Blackout Defense 1 item
  7. Bootleg 2 items
  8. Boss Barrels 3 items
  9. Bravo Company MFG (BCM) 8 items
  10. Daniel Defense 1 item
  11. Dead Foot Arms LLC 3 items
  12. Faxon Firearms 1 item
  13. FosTecH 1 item
  14. Geissele 1 item
  15. Grey Birch MFG 5 items
  16. JP Enterprises Inc 6 items
  17. Knight’s Armament Company (KAC) 1 item
  18. KNS Precision 1 item
  19. Lantac 1 item
  20. Lewis Machine & Tool (LMT) 2 items
  21. Maxim Defense 4 items
  22. NEMO Arms 1 item
  23. Next Level Armament 1 item
  24. Noveske 7 items
  25. Rainier Arms, LLC 88 items
  26. Sharps Bros 7 items
  27. Sionics Weapon Systems 1 item
  28. Stern Defense 1 item
  29. V Seven Weapon Systems 4 items
  30. 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
  15. Non-Adjustable 1 item
Platform
  1. AR-10/LR308 16 items
  2. AR-15 45 items
  3. AK47/74 1 item
  4. CZ-USA 1 item
  5. Remington 700 12 items
  6. Ruger 4 items
  7. Ruger Precision Rifle 12 items
  8. Savage Small Shank 13 items
  9. Sig Cross 4 items
Price
  1. $400.00 - $409.99 80 items
  2. $410.00 - $419.99 9 items
  3. $420.00 - $429.99 6 items
  4. $430.00 - $439.99 14 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 4 items
  10. $490.00 and above 11 items
Product Type
  1. AR-10/LR308 Barrel 14 items
  2. AR-10 Handguard 1 item
  3. AR-10 Receiver Set 2 items
  4. AR-15 Barrel 32 items
  5. AR-15 Complete Lower Receiver 10 items
  6. AR-15 Complete Upper Receiver 1 item
  7. AR-15 Partial Upper Receiver 5 items
  8. AR-15 Handguard 2 items
  9. AR-15 Receiver Set 6 items
  10. AR-15 Stripped Lower Receiver 1 item
  11. AR-15 Stripped Upper Receiver 1 item
  12. AR-9 Complete Lower Receiver 1 item
  13. AR-9 Upper Receiver 1 item
  14. Barrel 6 items
  15. Bolt 2 items
  16. Bolt-Action Barrel 46 items
  17. Bolt Carrier Group 7 items
  18. Chassis 13 items
  19. Complete Upper 2 items
  20. Grip Accessory 1 item
  21. Stock 5 items
  22. Stock Accessory 1 item
  23. Trigger 2 items
Rail Length
  1. 5" 1 item
  2. 7" 1 item
  3. 9.2" 1 item
  4. 9.5" 2 items
  5. 10" 4 items
  6. 10.5" 1 item
  7. 11" 1 item
  8. 12" 1 item
  9. 12.43" 1 item
  10. 13" 1 item
  11. 14" 5 items
  12. 15" 5 items
  13. 16.5" 1 item
  14. 18" 1 item
Thread Pitch
  1. 1/2x28 20 items
  2. 5/8x24 77 items
Threaded
  1. Yes 6 items
Twist Rate
  1. 1:7 16 items
  2. 1:7.5 25 items
  3. 1:8 26 items
  4. 1:10 28 items
Stock Status
  1. In stock 108 items
  2. Out of stock 55 items
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