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raineirarms

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. Aero Precision EPC-9 Receiver Set - Black
    Aero Precision EPC-9 Receiver Set - Black
    $334.98
    Out of stock
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  7. Centurion Arms C4 M-Lok Handguard - Midlength Cutout
    Centurion Arms C4 M-Lok Handguard - Midlength Cutout
    $314.00
    Out of stock
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  8. Fortis MFG LA Stock Bundle Pack
    Fortis MFG LA Stock Bundle Pack
    Out of stock
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  14. Fostech ECHO II AR-15 Platform Drop In Trigger
    Fostech ECHO II AR-15 Platform Drop In Trigger
    $399.99
    Out of stock
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Barrel Length
  1. 6.5" 1 item
  2. 8" 1 item
  3. 10.5" 1 item
  4. 12.5" 1 item
  5. 13.7" 1 item
  6. 14.5" 2 items
  7. 16" 2 items
  8. 18" 3 items
  9. 20" 2 items
  10. 22" 1 item
Barrel Profile
  1. MK12 SPR 1 item
Caliber
  1. .22 ARC 1 item
  2. .223 Wylde 2 items
  3. 300 Blackout 1 item
  4. 5.56 NATO 6 items
  5. 6.5 Creedmoor 1 item
  6. 6.5 Grendel 1 item
  7. 6MM Creedmoor 1 item
  8. 8.6 Blackout 3 items
Category
  1. Receiver Parts 12 items
  2. Barrels 15 items
  3. Trigger Parts 4 items
  4. Gas Systems 1 item
  5. Bolt Parts 3 items
  6. Rifle Handguards 11 items
  7. Stocks & Braces 6 items
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  1. Flat 1 item
Finish
  1. Black 1 item
  2. Nitride 6 items
  3. Satin 4 items
  4. Titanium Nitride (TiN) 1 item
Gas Block Diameter
  1. .750" 10 items
  2. .875" 1 item
Gas System Length
  1. Carbine 1 item
  2. Mid 5 items
  3. Rifle 5 items
  4. Rifle +2 1 item
Inside Diameter
  1. 1.3" 1 item
  2. 1.75" 1 item
Is Firearms?
  1. No 52 items
Manufacturer
  1. Aero Precision 1 item
  2. Battle Arms Development 2 items
  3. Bravo Company MFG (BCM) 2 items
  4. Centurion Arms 2 items
  5. Chisel Machining 1 item
  6. Daniel Defense 1 item
  7. Dead Foot Arms LLC 1 item
  8. Faxon Firearms 4 items
  9. Fortis MFG 3 items
  10. FosTecH 1 item
  11. Geissele 4 items
  12. JMAC Customs 1 item
  13. JP Enterprises Inc 1 item
  14. Knight’s Armament Company (KAC) 2 items
  15. Lantac 3 items
  16. Lewis Machine & Tool (LMT) 1 item
  17. Maxim Defense 1 item
  18. Midwest Industries 2 items
  19. Noveske 4 items
  20. Precision Reflex Inc 1 item
  21. Rainier Arms, LLC 7 items
  22. Sharps Bros 2 items
  23. Sons of Liberty Gun Works 1 item
  24. Triggertech 1 item
  25. Troy Industries 1 item
  26. V Seven Weapon Systems 2 items
Model
  1. FNH Scar 1 item
Mount
  1. M-LOK 7 items
  2. Picatinny 4 items
Option
  1. AR-9 1 item
  2. AR-10 1 item
  3. AR-15 10 items
  4. FNH 1 item
Platform
  1. AR-10/LR308 2 items
  2. AR-15 15 items
  3. AK47/74 1 item
  4. FNH 1 item
  5. Remington 700 1 item
  6. Savage Small Shank 2 items
Price
  1. $300.00 - $309.99 8 items
  2. $310.00 - $319.99 10 items
  3. $320.00 - $329.99 2 items
  4. $330.00 - $339.99 5 items
  5. $340.00 - $349.99 4 items
  6. $350.00 - $359.99 9 items
  7. $360.00 - $369.99 1 item
  8. $370.00 - $379.99 3 items
  9. $380.00 - $389.99 1 item
  10. $390.00 and above 9 items
Product Type
  1. AR-10/LR308 Barrel 2 items
  2. AR-10 Stripped Upper Receiver 1 item
  3. AR-15 Barrel 10 items
  4. AR-15 Complete Lower Receiver 4 items
  5. AR-15 Handguard 8 items
  6. AR-15 Receiver Set 2 items
  7. AR-15 Stripped Lower Receiver 3 items
  8. AR-15 Stripped Upper Receiver 1 item
  9. AR-9 Receiver Set 1 item
  10. Bolt-Action Barrel 3 items
  11. Bolt Carrier Group 3 items
  12. Brace 2 items
  13. Handguard 3 items
  14. Iron Sight 1 item
  15. Stock 4 items
  16. Trigger 4 items
Rail Length
  1. 6.25" 1 item
  2. 9.3" 1 item
  3. 10.5" 1 item
  4. 10.64" 1 item
  5. 11.5" 1 item
  6. 12.5" 1 item
  7. 13" 1 item
  8. 13.5" 1 item
  9. 13.625" 1 item
  10. 15" 2 items
  11. 17" 1 item
Thread Pitch
  1. 1/2x28 (.22 cal) 8 items
  2. 5/8x24 (.30 cal) 7 items
Twist Rate
  1. 1:3 3 items
  2. 1:7 7 items
  3. 1:7.5 1 item
  4. 1:8 4 items
Stock Status
  1. Out of stock 52 items Remove This Item
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