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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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Items 161-176 of 184

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  1. KNS Precision Discarder Adjustable Gas Regulator - SCAR
    KNS Precision Discarder Adjustable Gas Regulator - SCAR
    $140.00
    Out of stock
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  2. Huxwrx Flash Hider-QD 6 - 5/8x24
    Huxwrx Flash Hider-QD 6 - 5/8x24
    $144.00
    Out of stock
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  4. Sons Of Liberty Gun Works L9 Receiver Extension Kit
    Sons Of Liberty Gun Works L9 Receiver Extension Kit
    $151.05
    Out of stock
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  6. JMAC Custom ST-6 Skeletonized Tube
    JMAC Custom ST-6 Skeletonized Tube
    $103.46
    Out of stock
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  7. Next Level Armament AR-15 M-LOK Handguard - 10.25"
    Next Level Armament AR-15 M-LOK Handguard - 10.25"
    $113.00
    Out of stock
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  8. Q LLC Flash Hider 8.6BLK - 5/8x24
    Q LLC Flash Hider 8.6BLK - 5/8x24
    $115.00
    Out of stock
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  9. Reptilia Corp RMU Picatinny Riser Mount - 9 Slot
    Reptilia Corp RMU Picatinny Riser Mount - 9 Slot
    $143.95
    Out of stock
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  10. Reptilia Corp RMU Picatinny Riser Mount - 12 Slot
    Reptilia Corp RMU Picatinny Riser Mount - 12 Slot
    $152.96
    Out of stock
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  11. Raidworx Mach 15 Ambidextrous Charging Handle
    Raidworx Mach 15 Ambidextrous Charging Handle
    Out of stock
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  13. Huxwrx 9MM 3-Lug Housing Adapter
    Huxwrx 9MM 3-Lug Housing Adapter
    $112.00
    Out of stock
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Items 161-176 of 184

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  1. Price $100.00 - $199.99 Remove This Item
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Barrel Length
  1. 6" 2 items
  2. 7.5" 2 items
  3. 8" 1 item
  4. 8.3" 1 item
  5. 8.5" 2 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. 16" 4 items
  13. 18" 2 items
  14. 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 20 items
  10. 6.5 Grendel 2 items
  11. 7.62mm 2 items
  12. 7.62x51 1 item
  13. 8.6 Blackout 1 item
  14. 9mm 7 items
Category
  1. Receiver Parts 31 items
  2. Parts & Kits 5 items
  3. Barrels 26 items
  4. Buffer Systems 11 items
  5. Trigger Parts 12 items
  6. Gas Systems 3 items
  7. Muzzle Devices 22 items
  8. Bolt Parts 18 items
  9. Grips 7 items
  10. Charging Handles 8 items
  11. Rifle Handguards 28 items
  12. Stocks & Braces 18 items
Color
Configuration
  1. AR-15 3 items
  2. Carbine 1 item
  3. Curved 2 items
  4. Flat 2 items
  5. M-LOK 1 item
Finish
  1. Black Nitride 1 item
  2. Cerakote 3 items
  3. DLC 2 items
  4. Melonite 1 item
  5. Nickel Boron 1 item
  6. Nitride 11 items
  7. Phosphate 3 items
  8. Anodize 9 items
  9. Quench Polish Quench (QPQ) 1 item
Gas Block Diameter
  1. .625" 2 items
  2. .750" 17 items
Gas System Length
  1. Blowback 4 items
  2. Pistol 7 items
  3. Carbine 7 items
  4. Mid 1 item
  5. Intermediate 1 item
  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
Manufacturer
  1. Aero Precision 23 items
  2. Aeroknox 1 item
  3. ALG Defense 1 item
  4. Angstadt Arms 3 items
  5. B5 Systems 4 items
  6. Ballistic Advantage 12 items
  7. Battle Arms Development 5 items
  8. Blitzkrieg Components 1 item
  9. Bootleg 1 item
  10. Centurion Arms 1 item
  11. Chisel Machining 1 item
  12. Cross Machine Tool (CMT) 6 items
  13. F5 MFG 1 item
  14. Faxon Firearms 13 items
  15. Ferfrans 1 item
  16. Fortis MFG 2 items
  17. Gear Head Works 2 items
  18. Geissele 4 items
  19. Griffin Armament 2 items
  20. HB Industries 3 items
  21. HERA ARMS 2 items
  22. Hiperfire 8 items
  23. HUXWRX 3 items
  24. Icon Defense 1 item
  25. JMAC Customs 2 items
  26. JP Enterprises Inc 2 items
  27. Kinetic Development Group 1 item
  28. Knight’s Armament Company (KAC) 4 items
  29. KNS Precision 1 item
  30. Kalashnikov USA 1 item
  31. KynSHOT 3 items
  32. Lantac 2 items
  33. Magpul Industries 1 item
  34. Midwest Industries 12 items
  35. NEMO Arms 2 items
  36. Next Level Armament 3 items
  37. Noveske 2 items
  38. Precision Armament 4 items
  39. Primary Weapon Systems 2 items
  40. Q, LLC 2 items
  41. Radian Weapons 1 item
  42. Raidworx 1 item
  43. Rainier Arms, LLC 5 items
  44. Reptilia Corp 4 items
  45. Rise Armament 1 item
  46. SB Tactical 2 items
  47. Sig Sauer 1 item
  48. Silencerco 1 item
  49. Sionics Weapon Systems 1 item
  50. Sons of Liberty Gun Works 4 items
  51. Spinta Precision 2 items
  52. Surefire 2 items
  53. Triggertech 1 item
  54. Troy Industries 1 item
  55. Tyrant Designs 4 items
  56. V Seven Weapon Systems 2 items
  57. VKTR Industries 1 item
  58. VLTOR 1 item
  59. WMD Guns 3 items
Model
  1. CZ Bren 1 item
  2. FNH Scar 1 item
  3. IWI Galil 1 item
  4. Sig MCX 2 items
Mount
  1. M-LOK 13 items
  2. Picatinny 5 items
Option
  1. AK-47/74 2 items
  2. AR-9 2 items
  3. AR-10 4 items
  4. AR-15 37 items
  5. CZ 1 item
  6. Glock 1 item
  7. Heckler & Koch 1 item
Platform
  1. AR-9 1 item
  2. AR-10/LR308 1 item
  3. AR-15 38 items
  4. AK47/74 1 item
  5. FNH 1 item
  6. IWI 1 item
  7. Sig Sauer 3 items
Price
  1. $100.00 - $109.99 21 items
  2. $110.00 - $119.99 21 items
  3. $120.00 - $129.99 17 items
  4. $130.00 - $139.99 16 items
  5. $140.00 - $149.99 25 items
  6. $150.00 - $159.99 21 items
  7. $160.00 - $169.99 13 items
  8. $170.00 - $179.99 16 items
  9. $180.00 - $189.99 10 items
  10. $190.00 and above 24 items
Product Type
  1. AR-10/LR308 Barrel 1 item
  2. AR-10 / LR 308 Charging Handle 3 items
  3. AR-10 Complete Upper Receiver 1 item
  4. AR-10 Handguard 2 items
  5. AR-15 Assembled Upper Receiver 2 items
  6. AR-15 Barrel 25 items
  7. AR-15 Charging Handle 4 items
  8. AR-15 Handguard 10 items
  9. AR-15 Stripped Lower Receiver 15 items
  10. AR-15 Stripped Upper Receiver 12 items
  11. AR-9 Lower Receiver 1 item
  12. Blast Shield 1 item
  13. Bolt 3 items
  14. Bolt Carrier Group 14 items
  15. Brace 3 items
  16. Buffer 4 items
  17. Buffer Kit 3 items
  18. Buffer Spring 1 item
  19. Buffer Tube 3 items
  20. Builders Kit 1 item
  21. Charging Handle 2 items
  22. Compensator 2 items
  23. Flash Hider 8 items
  24. Forearm Accesory 1 item
  25. Gas Block 1 item
  26. Handguard 13 items
  27. Lower Parts Kit 2 items
  28. Muzzle Brake 7 items
  29. Muzzle Device Accessory 4 items
  30. Parts Kit 1 item
  31. Pistol Grip 3 items
  32. Piston System 2 items
  33. Rail Adapter 2 items
  34. Rail Section 1 item
  35. Safety Selector 1 item
  36. Stock 9 items
  37. Stock Accessory 3 items
  38. Stock Adapter 3 items
  39. Trigger 12 items
Rail Length
  1. 3" 1 item
  2. 4" 1 item
  3. 5.5" 1 item
  4. 6.0" 2 items
  5. 6.7" 3 items
  6. 7" 2 items
  7. 7.25" 1 item
  8. 7.9" 1 item
  9. 8.25" 1 item
  10. 9" 1 item
  11. 9.5" 3 items
  12. 9.6" 1 item
  13. 10.25" 1 item
  14. 10.5" 4 items
  15. 10.8" 1 item
  16. 12" 2 items
  17. 12.4" 1 item
  18. 12.5" 1 item
  19. 12.625" 1 item
  20. 13" 2 items
  21. 13.7" 3 items
  22. 13.8" 2 items
  23. 15" 9 items
  24. 15.3" 1 item
  25. 15.8" 1 item
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) 18 items
  4. 1/2x36 1 item
  5. 5/8x24 (.30 cal) 16 items
Threaded
  1. Yes 4 items
Twist Rate
  1. 1:5 2 items
  2. 1:7 10 items
  3. 1:8 8 items
  4. 1:10 6 items
Stock Status
  1. In stock 1 item
  2. Out of stock 183 items Remove This Item
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