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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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  2. B5 Systems M-Lok Vertical Foregrip
    B5 Systems M-Lok Vertical Foregrip
    $19.00 - $27.55
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  5. Ballistic Advantage Lo-Pro Gas Block - .750"
    Ballistic Advantage Lo-Pro Gas Block - .750"
    $28.50
    Out of stock
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  6. Aero Precision Upper Parts Kit
    Aero Precision Upper Parts Kit
    Out of stock
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  7. Strike Industries Rubber Over-Mold Pistol Grip - 25 Degree Black
    Strike Industries Rubber Over-Mold Pistol Grip - 25 Degree Black
    $22.95
    Out of stock
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  8. Lantac Circular Dome Head Smooth Flow Cam Pin for .223/5.56
    Lantac Circular Dome Head Smooth Flow Cam Pin for .223/5.56
    $27.99
    Out of stock
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  9. Battle Arms Development Aluminum Takedown/Pivot Pin Set - ODG
    Battle Arms Development Aluminum Takedown/Pivot Pin Set - ODG
    $26.95
    Out of stock
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  10. Faxon Firearms AR-10 Height 3 Screw Gas Block - .875
    Faxon Firearms AR-10 Height 3 Screw Gas Block - .875
    $26.79
    Out of stock
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  11. Forward Controls Design NVTS Nautilus Variable Timing System - 1/2x28
    Forward Controls Design NVTS Nautilus Variable Timing System - 1/2x28
    $23.75
    Out of stock
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  12. Next Level Armament NLX-HS M-LOK Handstop
    Next Level Armament NLX-HS M-LOK Handstop
    $29.00
    Out of stock
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  13. Battle Arms Development Enhanced Pins Set - FDE
    Battle Arms Development Enhanced Pins Set - FDE
    $26.95
    Out of stock
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  14. Ascalon Arms CZ Scorpion EVO 3/3+ Trigger Spring Kit
    Ascalon Arms CZ Scorpion EVO 3/3+ Trigger Spring Kit
    $22.00
    Out of stock
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  15. Magpul Enhanced Trigger Guard - AR15/M4
    Magpul Enhanced Trigger Guard - AR15/M4
    $21.80
    Out of stock
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  16. ERGO Enhanced SureGrip
    ERGO Enhanced SureGrip
    Out of stock
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Items 97-112 of 126

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  1. Price $20.00 - $29.99 Remove This Item
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Barrel Length
  1. 16" 1 item
  2. 18" 3 items
Caliber
  1. .223/5.56 2 items
  2. .308 1 item
  3. 9mm 1 item
Category
  1. Parts & Kits 44 items
  2. Buffer Systems 3 items
  3. Trigger Parts 8 items
  4. Gas Systems 10 items
  5. Muzzle Devices 3 items
  6. Bolt Parts 3 items
  7. Grips 35 items
  8. Charging Handles 1 item
  9. Rifle Handguards 9 items
  10. Stocks & Braces 2 items
  11. MILSPEC Parts 6 items
Color
Configuration
  1. AR-15 3 items
  2. M-LOK 1 item
  3. .625 DIA 2 items
  4. .750 DIA 3 items
  5. .875 DIA 2 items
  6. .936 DIA 2 items
Finish
  1. Black 1 item
  2. Anodize 3 items
  3. Quench Polish Quench (QPQ) 1 item
Gas Block Diameter
  1. .750" 2 items
  2. .875" 1 item
Gas Length
  1. Pistol 2 items
  2. Carbine 1 item
  3. Mid 1 item
  4. Intermediate 4 items
  5. Rifle 1 item
Height
  1. Absolute Co-Witness 1 item
Is Firearms?
  1. No 126 items
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 1 item
  7. Ballistic Advantage 1 item
  8. Battle Arms Development 7 items
  9. Blitzkrieg Components 5 items
  10. Bravo Company MFG (BCM) 3 items
  11. Cross Machine Tool (CMT) 5 items
  12. Die Free Co 1 item
  13. Drew Meyers Defense 3 items
  14. Driven Arms Co. 2 items
  15. Ergo Grips 2 items
  16. Faxon Firearms 2 items
  17. Fortis MFG 4 items
  18. Forward Controls Design 6 items
  19. Geissele 3 items
  20. HB Industries 4 items
  21. HERA ARMS 1 item
  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. Mag-Pod 1 item
  30. Magpul Industries 13 items
  31. Multitasker Tools 1 item
  32. Next Level Armament 2 items
  33. Noveske 2 items
  34. Patriot Ordnance Factory (POF) 1 item
  35. Precision Armament 1 item
  36. Rainier Arms, LLC 4 items
  37. Rainier Industries 3 items
  38. Reptilia Corp 1 item
  39. Stag Arms 1 item
  40. Strike Industries 6 items
  41. Tactical Edge Arms 1 item
  42. TruCalibre 1 item
  43. True North Concepts 4 items
  44. Tyrant Designs 1 item
  45. Unity Tactical 1 item
  46. V Seven Weapon Systems 7 items
Model
  1. CZ Scorpion 5 items
  2. Sig MPX 1 item
Mount
  1. KeyMod 1 item
  2. M-LOK 17 items
  3. Picatinny 7 items
Option
  1. AR-10 4 items
  2. AR-15 13 items
  3. CZ 6 items
  4. Green Laser 1 item
  5. Non-Adjustable 8 items
Platform
  1. AR-15 4 items
  2. CZ-USA 5 items
  3. Sig Sauer 1 item
Product Type
  1. Accessory 1 item
  2. Angled Grip 3 items
  3. AR-10 Handguard 1 item
  4. AR-15 Charging Handle 1 item
  5. Bolt Catch 3 items
  6. Buffer 3 items
  7. Buffer Spring 2 items
  8. Cam Pin 3 items
  9. Castle Nut 2 items
  10. Cable Clip 1 item
  11. Cheek Riser 1 item
  12. Compensator 1 item
  13. Dust Cover 1 item
  14. End Plate 2 items
  15. Finger Stop 2 items
  16. Flash Hider 1 item
  17. Forearm Accesory 3 items
  18. Forward Assist 1 item
  19. Gas Block 9 items
  20. Gas Tube 1 item
  21. Grip Accessory 1 item
  22. Handguard 1 item
  23. Handguard Adaptor 1 item
  24. Handstop 9 items
  25. Lower Parts Kit 2 items
  26. Magazine Catch 1 item
  27. Magazine Release 6 items
  28. Muzzle Device Accessory 1 item
  29. Parts Kit 4 items
  30. Pistol Grip 17 items
  31. Pistol Part 1 item
  32. Port Door Rod 2 items
  33. Rail Cover 2 items
  34. Rail Panel 1 item
  35. Safety Selector 3 items
  36. Shim Set 1 item
  37. Sight Post 4 items
  38. Stock Accessory 2 items
  39. Take Down / Pivot Pins 9 items
  40. Trigger / Hammer Pins 1 item
  41. Trigger Guard 7 items
  42. Trigger Spring 1 item
  43. Upper Parts Kit 2 items
  44. Vertical Grip 4 items
  45. Weight 1 item
Rail Length
  1. 12" 4 items
Size
  1. 9 Slot 4 items
Thread Pitch
  1. 1/2x28 5 items
  2. 5/8x24 2 items
Stock Status
  1. In stock 101 items
  2. Out of stock 25 items
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