Pursue Your Passion
My Cart

Discord

Menu
Account

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.

Dark mode is

View as Grid List

Items 1-16 of 174

Page
per page
  1. Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-1
    Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-1
    $190.00
    Out of stock
    Add to Wish List Add to Compare
  2. Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-2
    Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-2
    $190.00
    Out of stock
    Add to Wish List Add to Compare
  3. Battle Arms Development BAD-ASS NITE Ambidexterous Safety Selector - Tritium
    Battle Arms Development BAD-ASS NITE Ambidexterous Safety Selector - Tritium
    $139.95
    Out of stock
    Add to Wish List Add to Compare
  4. Aero Precision M4E1 AR-15 Threaded Stripped Upper Receiver - Black
    Aero Precision M4E1 AR-15 Threaded Stripped Upper Receiver - Black
    $134.99
    Out of stock
    Add to Wish List Add to Compare
  5. Aero Precision 5.56 Bolt Carrier Group Complete w/ Logo - Black Nitride
    Aero Precision 5.56 Bolt Carrier Group Complete w/ Logo - Black Nitride
    $154.99
    Out of stock
    Add to Wish List Add to Compare
  6. Aero Precision 5.56 Bolt Carrier Group (BCG) - Nickel Boron
    Aero Precision 5.56 Bolt Carrier Group (BCG) - Nickel Boron
    $189.99
    Out of stock
    Add to Wish List Add to Compare
  7. Battle Arms Development Workhorse AR-15 Stripped Forged Lower Receiver
    Battle Arms Development Workhorse AR-15 Stripped Forged Lower Receiver
    $125.00
    Out of stock
    Add to Wish List Add to Compare
  8. HiperFire PDI Black Sig MCX Drop In Trigger Assembly - Black Curved
    HiperFire PDI Black Sig MCX Drop In Trigger Assembly - Black Curved
    $171.00
    Out of stock
    Add to Wish List Add to Compare
  9. Lantac Dragon .308/7.62 Muzzle Brake W/ SILENCERCO ASR MOUNT
    Lantac Dragon .308/7.62 Muzzle Brake W/ SILENCERCO ASR MOUNT
    $147.99
    Out of stock
    Add to Wish List Add to Compare
  10. Ballistic Advantage Modern Series 5.56 Goverment Barrel - 20"
    Ballistic Advantage Modern Series 5.56 Goverment Barrel - 20"
    $185.25
    Out of stock
    Add to Wish List Add to Compare
  11. HiperFire PDI Black AR15/10/PCC Drop In Trigger Assembly - RG
    HiperFire PDI Black AR15/10/PCC Drop In Trigger Assembly - RG
    $171.00
    Out of stock
    Add to Wish List Add to Compare
  12. HiperFire PDI Black AR15/10/PCC Drop In Trigger Assembly - GS
    HiperFire PDI Black AR15/10/PCC Drop In Trigger Assembly - GS
    $171.00
    Out of stock
    Add to Wish List Add to Compare
  13. Ballistic Advantage Modern Series 300BLK Barrel - 9"
    Ballistic Advantage Modern Series 300BLK Barrel - 9"
    $152.00
    Out of stock
    Add to Wish List Add to Compare
  14. Ballistic Advantage Modern Series 5.56 NATO Government Profile Barrel - 11.5"
    Ballistic Advantage Modern Series 5.56 NATO Government Profile Barrel - 11.5"
    $147.25
    Out of stock
    Add to Wish List Add to Compare
  15. Aero Precision EPC-9 Lower Receiver - Black
    Aero Precision EPC-9 Lower Receiver - Black
    $169.99
    Out of stock
    Add to Wish List Add to Compare
  16. WMD Guns AR15 Bolt Carrier Group - NiB-X (Black)
    WMD Guns AR15 Bolt Carrier Group - NiB-X (Black)
    $190.00
    Out of stock
    Add to Wish List Add to Compare
View as Grid List

Items 1-16 of 174

Page
per page
Shop By
Now Shopping by
  1. Is Firearms? No Remove This Item
  2. Price $100.00 - $199.99 Remove This Item
Clear All
Shopping Options
Barrel Length
  1. 6" 1 item
  2. 8.3" 1 item
  3. 8.5" 2 items
  4. 9" 1 item
  5. 10.5" 3 items
  6. 11" 1 item
  7. 11.5" 2 items
  8. 12.5" 2 items
  9. 16" 3 items
  10. 18" 4 items
  11. 20" 3 items
Barrel Profile
  1. Dissipator 1 item
Caliber
  1. .223/5.56 1 item
  2. .223 Wylde 2 items
  3. .30 Cal 1 item
  4. .308 1 item
  5. .38/.357 Magnum 1 item
  6. .45 ACP 1 item
  7. 300 Blackout 4 items
  8. 5.56 NATO 19 items
  9. 6.5 Creedmoor 1 item
  10. 6.5 Grendel 1 item
  11. 7.62mm 2 items
  12. 7.62x51 1 item
  13. 9mm 7 items
Category
  1. Receiver Parts 30 items
  2. Parts & Kits 5 items
  3. Barrels 4 items
  4. Rifle Barrels 16 items
  5. Buffer Systems 8 items
  6. Trigger Parts 15 items
  7. Gas Systems 1 item
  8. Muzzle Devices 34 items
  9. Bolt Parts 20 items
  10. Grips 3 items
  11. Charging Handles 5 items
  12. Rifle Handguards 25 items
  13. Stocks & Braces 8 items
Color
Configuration
  1. AR-15 3 items
  2. Carbine 1 item
  3. Curved 3 items
  4. Flat 3 items
  5. M-LOK 1 item
  6. .750 DIA 2 items
Finish
  1. Black Nitride 3 items
  2. Cerakote 2 items
  3. DLC 3 items
  4. Melonite 1 item
  5. Nickel Boron 3 items
  6. Nitride 7 items
  7. Phosphate 2 items
  8. Anodize 8 items
  9. Titanium Nitride (TiN) 1 item
Gas Block Diameter
  1. .625" 1 item
  2. .750" 10 items
Gas System Length
  1. Pistol 3 items
  2. Carbine 5 items
  3. Intermediate 3 items
  4. Rifle 3 items
Inside Diameter
  1. 1.315" 3 items
  2. 1.34" 1 item
  3. 1.42" 1 item
  4. 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. Ballistic Advantage 12 items
  6. Battle Arms Development 3 items
  7. Blitzkrieg Components 1 item
  8. Bootleg 1 item
  9. Cross Machine Tool (CMT) 6 items
  10. F5 MFG 1 item
  11. Faxon Firearms 12 items
  12. Fortis MFG 3 items
  13. Gear Head Works 1 item
  14. Geissele 3 items
  15. Grey Birch MFG 1 item
  16. Grey Ghost Precision 1 item
  17. Griffin Armament 1 item
  18. HB Industries 1 item
  19. HERA ARMS 2 items
  20. Hiperfire 9 items
  21. HUXWRX 3 items
  22. Icon Defense 1 item
  23. JK Armament 1 item
  24. JMAC Customs 5 items
  25. JP Enterprises Inc 4 items
  26. Kinetic Development Group 1 item
  27. Knight’s Armament Company (KAC) 4 items
  28. Kalashnikov USA 1 item
  29. KynSHOT 2 items
  30. Lantac 7 items
  31. Midwest Industries 12 items
  32. NEMO Arms 2 items
  33. Noveske 1 item
  34. Precision Armament 3 items
  35. Primary Weapon Systems 1 item
  36. Q, LLC 1 item
  37. Rainier Arms, LLC 8 items
  38. Rainier Industries 1 item
  39. SB Tactical 1 item
  40. Sharps Bros 1 item
  41. Silencerco 1 item
  42. Sionics Weapon Systems 1 item
  43. Sons of Liberty Gun Works 2 items
  44. Spinta Precision 1 item
  45. Stern Defense 2 items
  46. Surefire 7 items
  47. Triggertech 2 items
  48. Troy Industries 1 item
  49. Tyrant Designs 4 items
  50. VLTOR 2 items
  51. WMD Guns 2 items
Model
  1. IWI Galil 1 item
  2. Sig MCX 2 items
Mount
  1. M-LOK 12 items
  2. Picatinny 5 items
Option
  1. AK-47/74 1 item
  2. AR-9 5 items
  3. AR-10 4 items
  4. AR-15 40 items
  5. Glock 1 item
  6. Heckler & Koch 1 item
Platform
  1. AR-15 15 items
  2. AK47/74 1 item
  3. IWI 1 item
  4. Sig Sauer 3 items
Price
  1. $100.00 - $109.99 13 items
  2. $110.00 - $119.99 17 items
  3. $120.00 - $129.99 22 items
  4. $130.00 - $139.99 15 items
  5. $140.00 - $149.99 23 items
  6. $150.00 - $159.99 22 items
  7. $160.00 - $169.99 16 items
  8. $170.00 - $179.99 17 items
  9. $180.00 - $189.99 10 items
  10. $190.00 and above 19 items
Product Type
  1. AR-10 / LR 308 Charging Handle 2 items
  2. AR-10 Complete Upper Receiver 1 item
  3. AR-10 Handguard 3 items
  4. AR-15 Assembled Upper Receiver 1 item
  5. AR-15 Barrel 4 items
  6. AR-15 Charging Handle 3 items
  7. AR-15 Handguard 12 items
  8. AR-15 Stripped Lower Receiver 13 items
  9. AR-15 Stripped Upper Receiver 11 items
  10. AR-9 Lower Receiver 2 items
  11. Barrel 15 items
  12. Blast Shield 1 item
  13. Bolt 4 items
  14. Bolt Carrier Group 17 items
  15. Brace 1 item
  16. Buffer 3 items
  17. Buffer Kit 2 items
  18. Buffer Spring 1 item
  19. Buffer Tube 1 item
  20. Builders Kit 1 item
  21. Compensator 1 item
  22. Flash Hider 10 items
  23. Handguard 10 items
  24. Lower Parts Kit 2 items
  25. Muzzle Brake 17 items
  26. Muzzle Device Accessory 5 items
  27. Pistol Grip 3 items
  28. Piston System 1 item
  29. Rail Section 1 item
  30. Safety Selector 1 item
  31. Silent Captured Spring 1 item
  32. Stock 2 items
  33. Stock Accessory 2 items
  34. Stock Adapter 3 items
  35. Trigger 15 items
Rail Length
  1. 3" 1 item
  2. 4" 1 item
  3. 5.5" 1 item
  4. 6.0" 2 items
  5. 6.7" 4 items
  6. 7" 1 item
  7. 7.25" 2 items
  8. 8.25" 1 item
  9. 9" 2 items
  10. 9.5" 3 items
  11. 9.6" 2 items
  12. 10.5" 4 items
  13. 12" 3 items
  14. 12.4" 2 items
  15. 12.5" 1 item
  16. 12.625" 1 item
  17. 13" 3 items
  18. 13.7" 3 items
  19. 13.8" 2 items
  20. 15" 10 items
  21. 15.3" 2 items
Size
  1. BACK STRAP:Large 1 item
  2. BACK STRAP:Medium 2 items
  3. 9 Slot 2 items
Thread Pitch
  1. 1.125x28 1 item
  2. 1.375-24 1 item
  3. 1/2x28 25 items
  4. 5/8x24 7 items
  5. M14x1 LH 1 item
  6. M24x1.5 RH 1 item
Threaded
  1. Yes 5 items
Twist Rate
  1. 1:7 1 item
  2. 1:8 4 items
  3. 1:10 1 item
Stock Status
  1. Out of stock 174 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