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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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Items 49-64 of 199

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  2. F5 MFG CZ Scorpion ACR Stock Adapter
    F5 MFG CZ Scorpion ACR Stock Adapter
    $125.00
    Out of stock
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  5. Aero Precision AR-15 M4E1 Stripped Lower Receiver - FDE
    Aero Precision AR-15 M4E1 Stripped Lower Receiver - FDE
    $159.99
    Out of stock
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  6. Geissele Super 7.62 Charging Handle - Black
    Geissele Super 7.62 Charging Handle - Black
    $140.00
    Out of stock
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  7. Tyrant Designs Mod V2 Pistol Grip
    Tyrant Designs Mod V2 Pistol Grip
    Out of stock
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  9. Sons of Liberty Gun Works Stripped Upper Receiver
    Sons of Liberty Gun Works Stripped Upper Receiver
    $142.50
    Out of stock
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  11. Gear Head Works Tailhook Mod 1 MP5K Folding Arm
    Gear Head Works Tailhook Mod 1 MP5K Folding Arm
    $141.70
    Out of stock
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  12. Midwest Industries Marlin M-Lok Handguard
    Midwest Industries Marlin M-Lok Handguard
    $178.95
    Out of stock
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  16. Aero Precision AR15 Stripped Lower Receiver Gen 2 - FDE
    Aero Precision AR15 Stripped Lower Receiver Gen 2 - FDE
    $139.99
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Items 49-64 of 199

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  1. Price $100.00 - $199.99 Remove This Item
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Barrel Length
  1. 6" 1 item
  2. 7.5" 2 items
  3. 8" 1 item
  4. 8.3" 1 item
  5. 8.5" 3 items
  6. 9" 1 item
  7. 10.5" 4 items
  8. 11" 1 item
  9. 11.5" 2 items
  10. 12.5" 3 items
  11. 13.9" 1 item
  12. 14.5" 1 item
  13. 16" 4 items
  14. 18" 3 items
  15. 20" 2 items
Barrel Profile
  1. Dissipator 2 items
  2. MK12 SPR 1 item
Caliber
  1. .223/5.56 2 items
  2. .223 Wylde 2 items
  3. .30 Cal 1 item
  4. .308 2 items
  5. .308 Win 1 item
  6. .38/.357 Magnum 1 item
  7. .45 ACP 1 item
  8. 300 Blackout 8 items
  9. 5.56 NATO 19 items
  10. 6.5 Grendel 1 item
  11. 7.62mm 3 items
  12. 7.62x51 1 item
  13. 9mm 10 items
Category
  1. Receiver Parts 33 items
  2. Parts & Kits 7 items
  3. Barrels 27 items
  4. Buffer Systems 10 items
  5. Trigger Parts 13 items
  6. Gas Systems 1 item
  7. Muzzle Devices 31 items
  8. Bolt Parts 22 items
  9. Grips 5 items
  10. Charging Handles 7 items
  11. Rifle Handguards 28 items
  12. Stocks & Braces 17 items
Color
Configuration
  1. AR-15 3 items
  2. Curved 3 items
  3. Flat 3 items
  4. M-LOK 1 item
Finish
  1. Black Nitride 2 items
  2. Cerakote 3 items
  3. DLC 3 items
  4. Melonite 1 item
  5. Nickel Boron 2 items
  6. Nitride 12 items
  7. Phosphate 2 items
  8. Anodize 11 items
  9. Quench Polish Quench (QPQ) 1 item
  10. Titanium Nitride (TiN) 1 item
Gas Block Diameter
  1. .625" 2 items
  2. .750" 18 items
Gas System Length
  1. Blowback 4 items
  2. Pistol 7 items
  3. Carbine 7 items
  4. Mid 2 items
  5. Intermediate 2 items
  6. Rifle 4 items
Inside Diameter
  1. 1.3" 1 item
  2. 1.315" 3 items
  3. 1.34" 1 item
  4. 1.4" 1 item
  5. 1.42" 1 item
  6. 1.5" 1 item
Is Firearms?
  1. No 199 items
Manufacturer
  1. Aero Precision 24 items
  2. Aeroknox 1 item
  3. ALG Defense 1 item
  4. Angstadt Arms 3 items
  5. Arms Republic 1 item
  6. B5 Systems 2 items
  7. Ballistic Advantage 13 items
  8. Battle Arms Development 5 items
  9. Blitzkrieg Components 2 items
  10. Bootleg 1 item
  11. Centurion Arms 2 items
  12. Cross Machine Tool (CMT) 6 items
  13. F5 MFG 1 item
  14. Faxon Firearms 17 items
  15. Ferfrans 1 item
  16. Fortis MFG 4 items
  17. Gear Head Works 2 items
  18. Geissele 6 items
  19. Griffin Armament 2 items
  20. HB Industries 1 item
  21. HERA ARMS 2 items
  22. Hiperfire 6 items
  23. HUXWRX 5 items
  24. JMAC Customs 3 items
  25. JP Enterprises Inc 6 items
  26. Kinetic Development Group 1 item
  27. Knight’s Armament Company (KAC) 2 items
  28. Kalashnikov USA 1 item
  29. KynSHOT 1 item
  30. Lantac 4 items
  31. Magpul Industries 1 item
  32. Maxim Defense 1 item
  33. Midwest Industries 12 items
  34. NEMO Arms 2 items
  35. Next Level Armament 2 items
  36. Noveske 1 item
  37. Precision Armament 3 items
  38. Primary Weapon Systems 2 items
  39. Q, LLC 1 item
  40. Radian Weapons 2 items
  41. Raidworx 1 item
  42. Rainier Arms, LLC 6 items
  43. Reptilia Corp 2 items
  44. Rise Armament 2 items
  45. SB Tactical 3 items
  46. Sharps Bros 1 item
  47. Sig Sauer 1 item
  48. Silencerco 1 item
  49. Sionics Weapon Systems 1 item
  50. Sons of Liberty Gun Works 3 items
  51. Spinta Precision 2 items
  52. Stern Defense 2 items
  53. Surefire 9 items
  54. Triggertech 2 items
  55. Troy Industries 1 item
  56. Tyrant Designs 4 items
  57. VLTOR 1 item
  58. WMD Guns 3 items
Model
  1. IWI Galil 1 item
  2. Sig MCX 1 item
Mount
  1. M-LOK 13 items
  2. Picatinny 5 items
Option
  1. AK-47/74 2 items
  2. AR-9 4 items
  3. AR-10 4 items
  4. AR-15 42 items
  5. CZ 1 item
  6. Glock 1 item
  7. Heckler & Koch 1 item
  8. Sharps Bros 1 item
Platform
  1. AR-9 1 item
  2. AR-10/LR308 2 items
  3. AR-15 38 items
  4. AK47/74 1 item
  5. IWI 1 item
  6. Sig Sauer 2 items
Price
  1. $100.00 - $109.99 18 items
  2. $110.00 - $119.99 18 items
  3. $120.00 - $129.99 22 items
  4. $130.00 - $139.99 22 items
  5. $140.00 - $149.99 29 items
  6. $150.00 - $159.99 29 items
  7. $160.00 - $169.99 16 items
  8. $170.00 - $179.99 16 items
  9. $180.00 - $189.99 10 items
  10. $190.00 and above 19 items
Product Type
  1. AR-10/LR308 Barrel 1 item
  2. AR-10 / LR 308 Charging Handle 2 items
  3. AR-10 Complete Upper Receiver 1 item
  4. AR-10 Handguard 3 items
  5. AR-15 Assembled Upper Receiver 1 item
  6. AR-15 Barrel 26 items
  7. AR-15 Charging Handle 5 items
  8. AR-15 Handguard 12 items
  9. AR-15 Stripped Lower Receiver 17 items
  10. AR-15 Stripped Upper Receiver 11 items
  11. AR-9 Lower Receiver 2 items
  12. Blast Shield 1 item
  13. Bolt 4 items
  14. Bolt Carrier Group 19 items
  15. Brace 4 items
  16. Buffer 4 items
  17. Buffer Kit 2 items
  18. Buffer Spring 3 items
  19. Buffer Tube 1 item
  20. Builders Kit 1 item
  21. Charging Handle 1 item
  22. Compensator 1 item
  23. Flash Hider 11 items
  24. Forearm Accesory 1 item
  25. Handguard 11 items
  26. Lower Parts Kit 4 items
  27. Muzzle Brake 14 items
  28. Muzzle Device Accessory 4 items
  29. Pistol Grip 3 items
  30. Piston System 1 item
  31. Rail Adapter 1 item
  32. Rail Section 1 item
  33. Safety Selector 1 item
  34. Stock 6 items
  35. Stock Accessory 4 items
  36. Stock Adapter 3 items
  37. Trigger 13 items
Rail Length
  1. 3" 1 item
  2. 4" 1 item
  3. 5.5" 1 item
  4. 6.0" 2 items
  5. 6.7" 4 items
  6. 7" 2 items
  7. 7.25" 1 item
  8. 8.25" 1 item
  9. 9" 2 items
  10. 9.5" 3 items
  11. 9.6" 2 items
  12. 10.25" 1 item
  13. 10.5" 4 items
  14. 12" 3 items
  15. 12.4" 2 items
  16. 12.5" 1 item
  17. 12.625" 1 item
  18. 13" 3 items
  19. 13.7" 3 items
  20. 13.8" 2 items
  21. 15" 11 items
  22. 15.3" 2 items
Size
  1. BACK STRAP:Large 1 item
  2. BACK STRAP:Medium 2 items
  3. 9 Slot 1 item
Thread Pitch
  1. 1.125x28 1 item
  2. 1/2x28 (9mm) 4 items
  3. 1/2x28 (.22 cal) 25 items
  4. 1/2x36 1 item
  5. 5/8x24 (.30 cal) 14 items
Threaded
  1. Yes 5 items
Twist Rate
  1. 1:5 1 item
  2. 1:7 11 items
  3. 1:8 9 items
  4. 1:10 6 items
Stock Status
  1. Out of stock 199 items Remove This Item
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