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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. Noveske Crusader 5.56mm Barrel - 12.5"
    Noveske Crusader 5.56mm Barrel - 12.5"
    $403.75
    Out of stock
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  2. V Seven Weapon Systems 2055 Enlightened AR-15 Upper Receivers
    V Seven Weapon Systems 2055 Enlightened AR-15 Upper Receivers
    $417.10
    Out of stock
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  3. V Seven Weapon Systems AR-15 Titanium BCG Complete Ionbond Finish
    V Seven Weapon Systems AR-15 Titanium BCG Complete Ionbond Finish
    $484.03
    Out of stock
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  4. Geissele Super Select-Fire (SSF®) Trigger
    Geissele Super Select-Fire (SSF®) Trigger
    $405.00
    Out of stock
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  5. Noveske 14.5" Lightweight 5.56mm Stainless Barrel
    Noveske 14.5" Lightweight 5.56mm Stainless Barrel
    $408.50
    Out of stock
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  6. Nemo Arms AR-15 Battle-Light Receiver Set
    Nemo Arms AR-15 Battle-Light Receiver Set
    $475.00
    Out of stock
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  7. Faxon Firearms AR-15 9mm FX910-U Complete Upper -10.5"
    Faxon Firearms AR-15 9mm FX910-U Complete Upper -10.5"
    $492.20
    Out of stock
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  8. Angstadt Arms AR-15 0940 Receiver Set for Glock
    Angstadt Arms AR-15 0940 Receiver Set for Glock
    $420.00
    Out of stock
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  9. Lantac N15 Raven Billet Receiver Set
    Lantac N15 Raven Billet Receiver Set
    $458.99
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  10. Noveske SPR 5.56MM Barrel - 18
    Noveske SPR 5.56MM Barrel - 18
    $451.25
    Out of stock
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  11. Noveske Lightweight Stainless Barrel - 18"
    Noveske Lightweight Stainless Barrel - 18"
    $451.25
    Out of stock
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  12. Noveske Afghan 5.56MM Barrel - 14.5
    Noveske Afghan 5.56MM Barrel - 14.5
    $408.50
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  13. 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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  14. Noveske N4 Light 5.56MM Barrel - 10.5 LP
    Noveske N4 Light 5.56MM Barrel - 10.5 LP
    $450.00
    Out of stock
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  15. Stern Defense AR 9mm MOD4 MLOK Complete Upper - 4"
    Stern Defense AR 9mm MOD4 MLOK Complete Upper - 4"
    $419.27
    Out of stock
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  16. V Seven Weapon Systems 2099 Ultra-Light M-LOK Handguard 308DPMS/SR25
    V Seven Weapon Systems 2099 Ultra-Light M-LOK Handguard 308DPMS/SR25
    Out of stock
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Items 33-48 of 61

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Barrel Length
  1. 4" 1 item
  2. 8.5" 1 item
  3. 10.5" 1 item
  4. 12" 1 item
  5. 12.5" 2 items
  6. 14.5" 2 items
  7. 16" 4 items
  8. 18" 2 items
  9. 20" 2 items
  10. 22" 9 items
Barrel Profile
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  2. Non-fluted 1 item
Caliber
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  3. .308 1 item
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  5. 300 Blackout 1 item
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  9. 6MM Creedmoor 5 items
  10. 7.62x51 1 item
  11. 9mm 2 items
Category
  1. Receiver Parts 31 items
  2. Barrels 13 items
  3. Rifle Barrels 9 items
  4. Trigger Parts 2 items
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  6. Grips 1 item
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  1. .750" 4 items
  2. .875" 3 items
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  4. Rifle +2 1 item
Inside Diameter
  1. 1.45" 1 item
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  3. Arms Republic 1 item
  4. Battle Arms Development 1 item
  5. Blackout Defense 1 item
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  7. Bravo Company MFG (BCM) 8 items
  8. Faxon Firearms 1 item
  9. FosTecH 1 item
  10. Geissele 1 item
  11. Grey Birch MFG 5 items
  12. JP Enterprises Inc 1 item
  13. Knight’s Armament Company (KAC) 1 item
  14. KNS Precision 1 item
  15. Lantac 1 item
  16. Lewis Machine & Tool (LMT) 2 items
  17. NEMO Arms 1 item
  18. Noveske 8 items
  19. Rainier Arms, LLC 13 items
  20. Sharps Bros 2 items
  21. Sionics Weapon Systems 1 item
  22. Stern Defense 1 item
  23. V Seven Weapon Systems 4 items
  24. WOOX 1 item
Mount
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  2. M-LOK 1 item
Option
  1. AR-9 1 item
  2. AR-10 1 item
  3. AR-15 7 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. 9mm 1 item
  9. Glock 1 item
  10. Non-Adjustable 2 items
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  2. AR-15 13 items
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  7. Savage Small Shank 4 items
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  5. $440.00 - $449.99 3 items
  6. $450.00 - $459.99 8 items
  7. $460.00 - $469.99 1 item
  8. $470.00 - $479.99 2 items
  9. $480.00 - $489.99 2 items
  10. $490.00 and above 6 items
Product Type
  1. AR-10 Barrel 1 item
  2. AR-10 Handguard 1 item
  3. AR-10 Receiver Set 1 item
  4. AR-15 Barrel 2 items
  5. AR-15 Complete Lower Receiver 9 items
  6. AR-15 Complete Upper Receiver 1 item
  7. AR-15 Partial Upper Receiver 2 items
  8. AR-15 Handguard 1 item
  9. AR-15 Receiver Set 4 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 9 items
  15. Bolt 1 item
  16. Bolt-Action Barrel 9 items
  17. Bolt Carrier Group 3 items
  18. Chassis 8 items
  19. Complete Upper 2 items
  20. Grip Accessory 1 item
  21. Trigger 2 items
Rail Length
  1. 5" 1 item
  2. 7" 1 item
  3. 10" 5 items
  4. 10.5" 1 item
  5. 12" 1 item
  6. 13" 1 item
  7. 14" 1 item
  8. 15" 3 items
  9. 16.5" 1 item
  10. 18" 1 item
Size
  1. 35mm rings 1 item
Thread Pitch
  1. 1/2x28 7 items
  2. 5/8x24 12 items
Threaded
  1. Yes 5 items
Twist Rate
  1. 1:7 5 items
  2. 1:7.5 5 items
  3. 1:8 3 items
  4. 1:10 5 items
Stock Status
  1. Out of stock 61 items Remove This Item
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