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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 113-128 of 131

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  1. Magpul MOE K2-XL Grip
    Magpul MOE K2-XL Grip
    Out of stock
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  2. Aero Precision Upper Parts Kit
    Aero Precision Upper Parts Kit
    Out of stock
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  7. Battle Arms Development Magazine Release Kit - EMMR
    Battle Arms Development Magazine Release Kit - EMMR
    $29.95
    Out of stock
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  9. Magpul MOE+ K2 Grip
    Magpul MOE+ K2 Grip
    Out of stock
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  10. Hera Arms MPSS AR15 90/45 Degree Safety Selector Set
    Hera Arms MPSS AR15 90/45 Degree Safety Selector Set
    $29.90
    Out of stock
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  11. Magpul MOE+ AR15/M4 Pistol Grip
    Magpul MOE+ AR15/M4 Pistol Grip
    Out of stock
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  12. Magpul RVG Rail Vertical Grip
    Magpul RVG Rail Vertical Grip
    Out of stock
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  16. Drew Meyer Defense Trifold M-LOK Rail Cover - Black
    Drew Meyer Defense Trifold M-LOK Rail Cover - Black
    $21.25
    Out of stock
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Items 113-128 of 131

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  1. Price $20.00 - $29.99 Remove This Item
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Barrel Length
  1. 16" 2 items
  2. 18" 3 items
Caliber
  1. .223/5.56 2 items
  2. .308 1 item
  3. 300 Blackout 1 item
  4. 9mm 1 item
Category
  1. Parts & Kits 48 items
  2. Buffer Systems 4 items
  3. Trigger Parts 8 items
  4. Gas Systems 9 items
  5. Muzzle Devices 5 items
  6. Bolt Parts 3 items
  7. Grips 28 items
  8. Charging Handles 1 item
  9. Rifle Handguards 11 items
  10. Stocks & Braces 6 items
  11. MILSPEC Parts 7 items
Color
Configuration
  1. AR-15 3 items
  2. M-LOK 2 items
  3. .625 DIA 2 items
  4. .750 DIA 3 items
  5. .875 DIA 2 items
  6. .936 DIA 2 items
Finish
  1. Black 2 items
  2. Anodize 3 items
  3. Quench Polish Quench (QPQ) 1 item
Gas Block Diameter
  1. .750" 2 items
Gas System Length
  1. Pistol 3 items
  2. Carbine 1 item
  3. Mid 1 item
  4. Intermediate 4 items
  5. Rifle 1 item
Height
  1. Absolute Co-Witness 1 item
Manufacturer
  1. A3 Tactical 1 item
  2. Aero Precision 1 item
  3. Apex Tactical Specialties 2 items
  4. Arisaka 2 items
  5. Ascalon Arms 2 items
  6. B5 Systems 2 items
  7. Ballistic Advantage 1 item
  8. Battle Arms Development 5 items
  9. Blitzkrieg Components 5 items
  10. Bravo Company MFG (BCM) 3 items
  11. Cross Machine Tool (CMT) 5 items
  12. Drew Meyers Defense 5 items
  13. Driven Arms Co. 2 items
  14. Eartune 1 item
  15. Ergo Grips 2 items
  16. Faxon Firearms 1 item
  17. Fortis MFG 4 items
  18. Forward Controls Design 6 items
  19. Geissele 3 items
  20. HB Industries 3 items
  21. HERA ARMS 2 items
  22. HUXWRX 1 item
  23. JP Enterprises Inc 2 items
  24. Knight’s Armament Company (KAC) 1 item
  25. KNS Precision 3 items
  26. Kalashnikov USA 1 item
  27. Kratos Design Group 1 item
  28. Lantac 2 items
  29. LUTH-AR 1 item
  30. Mad Pig 2 items
  31. Mag-Pod 1 item
  32. Magpul Industries 14 items
  33. Multitasker Tools 1 item
  34. Next Level Armament 2 items
  35. Noveske 2 items
  36. Patriot Ordnance Factory (POF) 1 item
  37. Precision Armament 1 item
  38. Q, LLC 4 items
  39. Rainier Arms, LLC 4 items
  40. Rainier Industries 3 items
  41. Reptilia Corp 1 item
  42. Rise Armament 1 item
  43. Stag Arms 1 item
  44. Strike Industries 5 items
  45. Tactical Edge Arms 1 item
  46. TruCalibre 2 items
  47. Tyrant Designs 1 item
  48. Unity Tactical 1 item
  49. V Seven Weapon Systems 7 items
Model
  1. CZ Scorpion 5 items
  2. Sig MPX 1 item
Mount
  1. M-LOK 13 items
  2. Other 2 items
  3. Picatinny 9 items
Option
  1. AR-10 5 items
  2. AR-15 12 items
  3. CZ 6 items
  4. Green Laser 1 item
  5. Non-Adjustable 8 items
Platform
  1. AR-15 7 items
  2. CZ 5 items
  3. Sig Sauer 1 item
Product Type
  1. Accessory 1 item
  2. Angled Grip 1 item
  3. AR-10 Handguard 1 item
  4. AR-15 Charging Handle 1 item
  5. AR-15 Handguard 1 item
  6. Bolt Catch 4 items
  7. Buffer 4 items
  8. Buffer Spring 2 items
  9. Cam Pin 3 items
  10. Castle Nut 2 items
  11. Castle Nut / End Plate 1 item
  12. Cable Clip 1 item
  13. Cheek Riser 2 items
  14. Compensator 1 item
  15. Dust Cover 1 item
  16. End Plate 4 items
  17. Finger Stop 2 items
  18. Flash Hider 1 item
  19. Forearm Accesory 3 items
  20. Forward Assist 1 item
  21. Gas Block 8 items
  22. Gas Tube 1 item
  23. Grip Accessory 2 items
  24. Handguard 1 item
  25. Handguard Adaptor 1 item
  26. Handstop 6 items
  27. Lower Parts Kit 2 items
  28. Magazine Catch 1 item
  29. Magazine Release 6 items
  30. Muzzle Device Accessory 3 items
  31. Parts Kit 4 items
  32. Pistol Grip 13 items
  33. Pistol Part 1 item
  34. Port Door Rod 2 items
  35. Rail Cover 2 items
  36. Rail Panel 2 items
  37. Safety Selector 4 items
  38. Shim Set 1 item
  39. Sight Post 4 items
  40. Stock 1 item
  41. Stock Accessory 1 item
  42. Stock Adapter 1 item
  43. Take Down / Pivot Pins 10 items
  44. Trigger / Hammer Pins 1 item
  45. Trigger Guard 7 items
  46. Trigger Spring 1 item
  47. Upper Parts Kit 2 items
  48. Vertical Grip 5 items
  49. Weight 1 item
Rail Length
  1. 12" 5 items
Size
  1. 9 Slot 5 items
Thread Pitch
  1. 1/2x28 (9mm) 1 item
  2. 1/2x28 (.22 cal) 4 items
  3. 5/8x24 (.30 cal) 3 items
Stock Status
  1. In stock 102 items
  2. Out of stock 29 items
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