Pursue Your Passion
My Cart

Rainier Arms on Instagram

Menu
Account
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.

View as Grid List

Items 17-32 of 46

Page
per page
  1. Angstadt Arms 16″ 9mm Complete Upper Assembly
    Angstadt Arms 16″ 9mm Complete Upper Assembly
    $629.00
    Out of stock
    Add to Wish List Add to Compare
  4. Faxon Firearms AR-15 9mm FX916-U Complete Upper -16"
    Faxon Firearms AR-15 9mm FX916-U Complete Upper -16"
    $506.00
    Out of stock
    Add to Wish List Add to Compare
  5. Faxon Firearms Light Tapered 9mm AR-15 Barrel - 16"
    Faxon Firearms Light Tapered 9mm AR-15 Barrel - 16"
    $133.40
    Out of stock
    Add to Wish List Add to Compare
  9. Faxon Firearms PENCIL .308 Win AR-10/LR308 Barrel - 16"
    Faxon Firearms PENCIL .308 Win AR-10/LR308 Barrel - 16"
    $238.28
    Out of stock
    Add to Wish List Add to Compare
  11. Troy Industries Ambidextrous Magazine Release
    Troy Industries Ambidextrous Magazine Release
    $58.00
    Out of stock
    Add to Wish List Add to Compare
  12. Stag Arms A2 Pistol Grip
    Stag Arms A2 Pistol Grip
    $3.50
    Out of stock
    Add to Wish List Add to Compare
  13. VLTOR Flash Hider - VC:A2
    VLTOR Flash Hider - VC:A2
    $54.86
    Out of stock
    Add to Wish List Add to Compare
  14. Young Mfg Aluminum Railed Gas Block - .750
    Young Mfg Aluminum Railed Gas Block - .750
    $39.00
    Out of stock
    Add to Wish List Add to Compare
  15. Young Mfg National Match LITE Bolt Carrier Group
    Young Mfg National Match LITE Bolt Carrier Group
    $265.00
    Out of stock
    Add to Wish List Add to Compare
  16. VLTOR 6 Position Receiver Extension - RE-10
    VLTOR 6 Position Receiver Extension - RE-10
    $49.46
    Out of stock
    Add to Wish List Add to Compare
View as Grid List

Items 17-32 of 46

Page
per page
Shop By
Now Shopping by
  1. Barrel Length 16" Remove This Item
Clear All
Shopping Options
Barrel Profile
  1. Dissipator 2 items
  2. Non-fluted 1 item
Caliber
  1. .223/5.56 1 item
  2. .223 Wylde 6 items
  3. .308 1 item
  4. .308 Win 6 items
  5. .458 Socom 1 item
  6. 300 Blackout 2 items
  7. 5.56X45 1 item
  8. 5.56 NATO 16 items
  9. 7.62x51 2 items
  10. 8.6 Blackout 2 items
  11. 9mm 5 items
Category
  1. Receiver Parts 12 items
  2. Parts & Kits 2 items
  3. Barrels 25 items
  4. Buffer Systems 2 items
  5. Gas Systems 1 item
  6. Muzzle Devices 1 item
  7. Bolt Parts 1 item
  8. Grips 1 item
  9. Stocks & Braces 1 item
Color
Configuration
  1. M-LOK 4 items
Finish
  1. Chrome 1 item
  2. Nitride 10 items
  3. Polished 2 items
  4. Satin 4 items
  5. Anodize 1 item
Gas Block Diameter
  1. .625" 2 items
  2. .750" 17 items
  3. .875" 1 item
Gas System Length
  1. Blowback 3 items
  2. Pistol 2 items
  3. Carbine 3 items
  4. Mid 25 items
  5. Intermediate 2 items
  6. Rifle 2 items
Height
  1. Absolute Co-Witness 2 items
Manufacturer
  1. Angstadt Arms 1 item
  2. Ballistic Advantage 2 items
  3. Bravo Company MFG (BCM) 5 items
  4. Centurion Arms 1 item
  5. Faxon Firearms 10 items
  6. Lewis Machine & Tool (LMT) 1 item
  7. Noveske 3 items
  8. Patriot Ordnance Factory (POF) 1 item
  9. Rainier Arms, LLC 11 items
  10. Sons of Liberty Gun Works 2 items
  11. Spinta Precision 1 item
  12. Stag Arms 1 item
  13. Troy Industries 1 item
  14. VKTR Industries 1 item
  15. VLTOR 3 items
Mount
  1. KeyMod 7 items
  2. M-LOK 4 items
  3. Picatinny 2 items
Option
  1. AR-15 9 items
Platform
  1. AR-10/LR308 3 items
  2. AR-15 21 items
  3. Remington 700 2 items
  4. Savage Small Shank 2 items
Price
  1. $0.00 - $999.99 43 items
  2. $1,000.00 and above 3 items
Product Type
  1. AR-10/LR308 Barrel 3 items
  2. AR-15 Barrel 17 items
  3. AR-15 Complete Upper Receiver 4 items
  4. AR-15 Partial Upper Receiver 6 items
  5. Bolt-Action Barrel 5 items
  6. Buffer Tube 2 items
  7. Cam Pin 1 item
  8. Complete Upper 2 items
  9. End Plate 1 item
  10. Flash Hider 1 item
  11. Patch 1 item
Rail Length
  1. 9.5" 1 item
  2. 10" 7 items
  3. 12" 2 items
  4. 15" 6 items
Size
  1. 9 Slot 9 items
Thread Pitch
  1. 1/2x28 (9mm) 2 items
  2. 1/2x28 (.22 cal) 15 items
  3. 1/2x36 1 item
  4. 5/8x24 (.30 cal) 8 items
  5. 11/16x24 1 item
Threaded
  1. Yes 2 items
Twist Rate
  1. 1:3 2 items
  2. 1:7 10 items
  3. 1:7.5 1 item
  4. 1:8 8 items
  5. 1:10 10 items
  6. 1:14 1 item
Stock Status
  1. Out of stock 46 items Remove This Item
My Wish List
Last Added Items
  1. Add to Cart
    Remove This Item
Go to Wish List
You have no items in your wish list.
Google Customer Reviews Google Customer Reviews