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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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  4. Rainier Arms UltraMatch MOD2 6mm ARC Rifle Barrel - 22"
    Rainier Arms UltraMatch MOD2 6mm ARC Rifle Barrel - 22"
    $400.00
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  5. Rainier Arms Ultramatch MOD2 300BLK Barrel - 10"
    Rainier Arms Ultramatch MOD2 300BLK Barrel - 10"
    $400.00
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  6. Rainier Arms UltraMatch MOD2 6.5 Grendel - 18"
    Rainier Arms UltraMatch MOD2 6.5 Grendel - 18"
    $400.00
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  7. Rainier Arms Ultramatch MOD2 .223 Wylde Barrel - 18"
    Rainier Arms Ultramatch MOD2 .223 Wylde Barrel - 18"
    $400.00
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  8. Rainier Arms Ultramatch MOD2 .223 Wylde Barrel - 20"
    Rainier Arms Ultramatch MOD2 .223 Wylde Barrel - 20"
    $400.00
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  9. Aero Precision EPC-9 Carbine Complete Lower Receiver w/MOE Grip, No Stock - Black
    Aero Precision EPC-9 Carbine Complete Lower Receiver w/MOE Grip, No Stock - Black
    $405.00
    Out of stock
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  10. Bootleg Mil Spec AR-15 300BLK CamLok (M-Lok) Partial Upper - 8.5"
    Bootleg Mil Spec AR-15 300BLK CamLok (M-Lok) Partial Upper - 8.5"
    $489.00
    Out of stock
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  11. Sionics Weapon Systems (SWS) AR-15 Complete Lower Receiver W/MOE K-2 Grip & SL Stock
    Sionics Weapon Systems (SWS) AR-15 Complete Lower Receiver W/MOE K-2 Grip & SL Stock
    $449.95
    Out of stock
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  12. KNS Precision AR15/M16 Gen 2 Spade Grip with Carbine Stock Assembly
    KNS Precision AR15/M16 Gen 2 Spade Grip with Carbine Stock Assembly
    $450.00
    Out of stock
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  13. Rainier Arms Ultramatch MOD2 .223 Wylde Barrel - 12" Satin
    Rainier Arms Ultramatch MOD2 .223 Wylde Barrel - 12" Satin
    $400.00
    Out of stock
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  14. Noveske Stainless Lo-Pro Gas Block 7.62x51 Barrel - 12.5" Leonidas
    Noveske Stainless Lo-Pro Gas Block 7.62x51 Barrel - 12.5" Leonidas
    $475.00
    Out of stock
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  15. Lewis Machine & Tool (LMT) AR-15 5.56 Semi Auto G2 Piston Bolt Carrier Group
    Lewis Machine & Tool (LMT) AR-15 5.56 Semi Auto G2 Piston Bolt Carrier Group
    $429.00
    Out of stock
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  16. Angstadt Arms AR-15 5.56 Complete Upper Assembly - 16"
    Angstadt Arms AR-15 5.56 Complete Upper Assembly - 16"
    $404.00
    Out of stock
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Items 81-96 of 149

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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" 1 item
  5. 10.5" 6 items
  6. 10.7" 1 item
  7. 11.5" 2 items
  8. 12" 1 item
  9. 12.5" 5 items
  10. 13.7" 1 item
  11. 14.5" 3 items
  12. 16" 20 items
  13. 18" 19 items
  14. 20" 10 items
  15. 22" 20 items
  16. 24" 3 items
  17. 26" 2 items
Barrel Profile
  1. Full-fluted 16 items
  2. Non-fluted 3 items
Caliber
  1. .22 ARC 2 items
  2. .223 Wylde 5 items
  3. .308 2 items
  4. .308 Win 20 items
  5. 300 Blackout 5 items
  6. 300 Norma Mag 1 item
  7. 338 Lapua 1 item
  8. 5.56X45 4 items
  9. 5.56 NATO 11 items
  10. 6mm ARC 2 items
  11. 6.5 Creedmoor 15 items
  12. 6.5 Grendel 3 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 44 items
  2. Barrels 63 items
  3. Rifle Barrels 38 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. .750 DIA 1 item
  2. Silent Captured Spring 9mm 1 item
Finish
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  2. Cerakote 1 item
  3. Polished 22 items
  4. Satin 24 items
  5. Anodize 4 items
  6. Clear Hard Anodize 3 items
Gas Block Diameter
  1. .750" 19 items
  2. .875" 9 items
  3. .936" 1 item
Gas Length
  1. Pistol 3 items
  2. Carbine 7 items
  3. Mid 9 items
  4. Intermediate 2 items
  5. Rifle 8 items
  6. Rifle +1 3 items
  7. Rifle +2 3 items
Height
  1. Absolute Co-Witness 1 item
Inside Diameter
  1. 1.08" 1 item
  2. 1.45" 1 item
Is Firearms?
  1. No 149 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. Cross Machine Tool (CMT) 1 item
  11. Daniel Defense 1 item
  12. Dead Foot Arms LLC 3 items
  13. Faxon Firearms 1 item
  14. FosTecH 1 item
  15. Geissele 1 item
  16. Grey Birch MFG 5 items
  17. JP Enterprises Inc 6 items
  18. Knight’s Armament Company (KAC) 1 item
  19. KNS Precision 1 item
  20. Lantac 1 item
  21. Lewis Machine & Tool (LMT) 4 items
  22. Maxim Defense 4 items
  23. NEMO Arms 1 item
  24. Next Level Armament 1 item
  25. Noveske 11 items
  26. Rainier Arms, LLC 67 items
  27. Sharps Bros 7 items
  28. Sionics Weapon Systems 1 item
  29. Stern Defense 1 item
  30. V Seven Weapon Systems 4 items
  31. WOOX 1 item
Mount
  1. KeyMod 1 item
  2. M-LOK 6 items
Option
  1. AR-9 1 item
  2. AR-10 1 item
  3. AR-15 9 items
  4. Standard 1 item
  5. Remington 700 Short Action BDL 1 item
  6. Remington 700 Long Action BDL 1 item
  7. Sauer 100 1 item
  8. JP Silent Captured Spring - Standard 1 item
  9. JP Silent Captured Spring - Heavy 1 item
  10. JP Silent Captured Spring - 9mm 1 item
  11. Buffer & Spring - Standard 1 item
  12. Buffer & Spring - H1 1 item
  13. 9mm 1 item
  14. Glock 1 item
  15. Remington 1 item
  16. Non-Adjustable 2 items
Platform
  1. AR-9 1 item
  2. AR-10 4 items
  3. AR-15 19 items
  4. AK47/74 1 item
  5. CZ-USA 1 item
  6. Remington 700 12 items
  7. Ruger 4 items
  8. Ruger Precision Rifle 12 items
  9. Savage Small Shank 13 items
  10. Sig Cross 4 items
Price
  1. $400.00 - $409.99 69 items
  2. $410.00 - $419.99 9 items
  3. $420.00 - $429.99 5 items
  4. $430.00 - $439.99 12 items
  5. $440.00 - $449.99 4 items
  6. $450.00 - $459.99 20 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 14 items
Product Type
  1. AR-10 Barrel 2 items
  2. AR-10 Handguard 1 item
  3. AR-10 Receiver Set 2 items
  4. AR-15 Barrel 2 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 2 items
  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 37 items
  15. Bolt 2 items
  16. Bolt-Action Barrel 42 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" 5 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
Size
  1. 35mm rings 1 item
Thread Pitch
  1. 1/2x28 15 items
  2. 5/8x24 61 items
  3. 5/8x28 1 item
Threaded
  1. Yes 12 items
Twist Rate
  1. 1:7 14 items
  2. 1:7.5 18 items
  3. 1:8 21 items
  4. 1:10 24 items
  5. 1:16 1 item
Stock Status
  1. In stock 88 items
  2. Out of stock 61 items
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