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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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  9. V Seven Weapon Systems Titanium Pivot / Take Down Pins AR15
    V Seven Weapon Systems Titanium Pivot / Take Down Pins AR15
    $30.07 - $32.01
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  10. Driven Arms Co. AR15 Ultralight Compact Grip - Diamond Texture
    Driven Arms Co. AR15 Ultralight Compact Grip - Diamond Texture
    $39.95 - $44.95
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  14. Driven Arms Co. Utility Compact Grip (ULCG Gen 2) - Atom
    Driven Arms Co. Utility Compact Grip (ULCG Gen 2) - Atom
    $39.95 - $44.95
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  15. Driven Arms Co. Utility Compact Grip (ULCG Gen 2) - Apex
    Driven Arms Co. Utility Compact Grip (ULCG Gen 2) - Apex
    $39.95 - $44.95
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Items 65-80 of 137

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Barrel Length
  1. 7" 1 item
  2. 16" 2 items
  3. 18" 3 items
Caliber
  1. 300 Blackout 1 item
  2. 5.56 NATO 1 item
  3. 9mm 1 item
Category
  1. Parts & Kits 48 items
  2. Buffer Systems 3 items
  3. Trigger Parts 7 items
  4. Gas Systems 10 items
  5. Muzzle Devices 2 items
  6. Bolt Parts 4 items
  7. Grips 34 items
  8. Charging Handles 3 items
  9. Rifle Handguards 13 items
  10. Stocks & Braces 8 items
  11. MILSPEC Parts 4 items
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Configuration
  1. AR-15 2 items
  2. Gen 1-3 1 item
  3. GEN 2 1 item
  4. Left Hand 1 item
  5. M-LOK 2 items
  6. Right Hand 1 item
  7. .625 DIA 2 items
  8. .750 DIA 1 item
  9. .800 DIA 1 item
  10. .875 DIA 1 item
  11. .936 DIA 1 item
Finish
  1. Black 4 items
  2. Black Nitride 1 item
  3. Melonite 1 item
  4. Nitride 2 items
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  6. Anodize 1 item
Gas Block Diameter
  1. .625" 1 item
  2. .750" 6 items
  3. .875" 1 item
  4. .936" 1 item
Gas Length
  1. Pistol 2 items
  2. Mid 1 item
  3. Intermediate 3 items
Manufacturer
  1. A3 Tactical 2 items
  2. Accu-Tac 1 item
  3. Aero Precision 1 item
  4. Aeroknox 2 items
  5. Arisaka 4 items
  6. Armaspec 2 items
  7. Arms Republic 2 items
  8. Ascalon Arms 2 items
  9. Battle Arms Development 6 items
  10. Blitzkrieg Components 2 items
  11. Bravo Company MFG (BCM) 2 items
  12. Drew Meyers Defense 4 items
  13. Driven Arms Co. 9 items
  14. Elftmann Tactical 1 item
  15. Emissary Development 3 items
  16. Ergo Grips 2 items
  17. Faxon Firearms 2 items
  18. Fortis MFG 6 items
  19. Forward Controls Design 12 items
  20. Griffin Armament 1 item
  21. HB Industries 2 items
  22. HERA ARMS 2 items
  23. JK Armament 1 item
  24. JP Enterprises Inc 3 items
  25. Kinetic Development Group 1 item
  26. Knight’s Armament Company (KAC) 1 item
  27. KNS Precision 3 items
  28. Kratos Design Group 1 item
  29. Lantac 2 items
  30. Mad Pig 2 items
  31. Magpul Industries 9 items
  32. Maxim Defense 2 items
  33. Midwest Industries 1 item
  34. Next Level Armament 2 items
  35. Noveske 1 item
  36. Primary Weapon Systems 1 item
  37. Q, LLC 1 item
  38. Rainier Arms, LLC 2 items
  39. Rainier Industries 1 item
  40. Reptilia Corp 1 item
  41. Sharps Bros 1 item
  42. Sig Sauer 1 item
  43. SLR Rifleworks 1 item
  44. Strike Industries 4 items
  45. Superlative Arms 1 item
  46. TruCalibre 2 items
  47. Tyrant Designs 1 item
  48. V Seven Weapon Systems 10 items
  49. VLTOR 1 item
  50. White Label Armory 1 item
Model
  1. CZ Scorpion 5 items
Mount
  1. KeyMod 1 item
  2. M-LOK 14 items
  3. Picatinny 12 items
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  1. AK-47/74 1 item
  2. AR-10 3 items
  3. AR-15 14 items
  4. Standard 1 item
  5. 4.720" 2 items
  6. 6.295" 2 items
  7. 7.870" 2 items
  8. 9.445" 2 items
  9. Bull's Eye 1 item
  10. Vertical Lines 1 item
  11. Minimal 1 item
  12. 1.125-28 TPI 3 Lug/Booster Adaptor 1 item
  13. 1.180-24 TPI 3 Lug/Booster Adaptor 1 item
  14. CZ 6 items
  15. Holed 1 item
  16. Profile 1 item
  17. Green Laser 1 item
  18. Non-Adjustable 7 items
Platform
  1. AR-15 11 items
  2. CZ-USA 5 items
Product Type
  1. Accessory 3 items
  2. Angled Grip 3 items
  3. AR-15 Charging Handle 2 items
  4. AR-15 Stripped Lower Receiver 1 item
  5. Bolt Catch 6 items
  6. Buffer 3 items
  7. Buffer Tube 2 items
  8. Castle Nut / End Plate 3 items
  9. Charging Handle 1 item
  10. Dust Cover 1 item
  11. End Plate 2 items
  12. Firing Pin 3 items
  13. Flash Hider 1 item
  14. Forearm Accesory 2 items
  15. Forward Assist 5 items
  16. Gas Block 8 items
  17. Grip Accessory 1 item
  18. Handguard 2 items
  19. Handstop 15 items
  20. Lower Parts Kit 4 items
  21. Magazine Catch 2 items
  22. Magazine Release 3 items
  23. Muzzle Device Accessory 1 item
  24. Parts Kit 1 item
  25. Pistol Grip 13 items
  26. Rail Adapter 5 items
  27. Rail Panel 2 items
  28. Safety Selector 8 items
  29. Sight Post 2 items
  30. Spring 1 item
  31. Stock 2 items
  32. Stock Accessory 1 item
  33. Stock Adapter 4 items
  34. Take Down / Pivot Pins 14 items
  35. Trigger 3 items
  36. Trigger Guard 1 item
  37. Vertical Grip 2 items
Rail Length
  1. 7.3" 1 item
  2. 7.8" 1 item
  3. 10" 1 item
  4. 12" 4 items
  5. 12.6" 1 item
Size
  1. 3 Slot 1 item
  2. 5 Slot 2 items
  3. 9 Slot 5 items
Thread Pitch
  1. 1/2x28 1 item
Stock Status
  1. In stock 98 items
  2. Out of stock 39 items
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