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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 81-96 of 717

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  1. Hiperfire EDT Select-Fire, AR15/10 M4/M16 Trigger Assembly, Full-auto
    Hiperfire EDT Select-Fire, AR15/10 M4/M16 Trigger Assembly, Full-auto
    $141.55
    Out of stock
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  2. Battle Arms Development Enhanced Bolt Catch - Investment Cast
    Battle Arms Development Enhanced Bolt Catch - Investment Cast
    $13.95
    Out of stock
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  3. Faxon Firearms Match Series 6.5 Grendel AR-15 Fluted Barrel - 18"
    Faxon Firearms Match Series 6.5 Grendel AR-15 Fluted Barrel - 18"
    $303.60
    Out of stock
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  4. Angstadt Arms Pistol Caliber Upper Receiver
    Angstadt Arms Pistol Caliber Upper Receiver
    $195.00
    Out of stock
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  5. Faxon Firearms 6.5 Creedmoor 416-R Stainless Fluted Barrel MATCH SERIES - 20"
    Faxon Firearms 6.5 Creedmoor 416-R Stainless Fluted Barrel MATCH SERIES - 20"
    $376.28
    Out of stock
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  6. KynSHOT RB5000 Marksman Recoil Buffer - AR15 Carbine
    KynSHOT RB5000 Marksman Recoil Buffer - AR15 Carbine
    $124.95
    Out of stock
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  7. Aero Precision AR-15 M4E1 Stripped Lower Receiver - Black
    Aero Precision AR-15 M4E1 Stripped Lower Receiver - Black
    $139.99
    Out of stock
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  8. Faxon Firearms Stripped Forged Upper Receiver - 7075-T6
    Faxon Firearms Stripped Forged Upper Receiver - 7075-T6
    $91.99
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  9. Springer Precision MPX Aluminum Magwell
    Springer Precision MPX Aluminum Magwell
    Out of stock
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  10. Geissele Super MCX SSA Trigger
    Geissele Super MCX SSA Trigger
    Out of stock
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  11. Precision Armament - M11 Severe Duty Muzzle Brake DLC Blk .264/6.5
    Precision Armament - M11 Severe Duty Muzzle Brake DLC Blk .264/6.5
    $113.99
    Out of stock
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  12. Fortis MFG Muzzle Brake 300BLK Nitride
    Fortis MFG Muzzle Brake 300BLK Nitride
    $75.95
    Out of stock
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  13. Hera Arms HUS AR-15 Billet Upper Receivers
    Hera Arms HUS AR-15 Billet Upper Receivers
    $139.00
    Out of stock
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  14. Aero Precision AR15 Stripped Upper Receiver Black Anodized
    Aero Precision AR15 Stripped Upper Receiver Black Anodized
    $104.99
    Out of stock
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  15. Rainier Arms Precision Match .308 BCG - Black Nitride HPR
    Rainier Arms Precision Match .308 BCG - Black Nitride HPR
    $289.95
    Out of stock
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  16. Radian Weapons AR-15 Raptor SL Ambidextrous Charging Handle - Black
    Radian Weapons AR-15 Raptor SL Ambidextrous Charging Handle - Black
    $94.95
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Items 81-96 of 717

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Barrel Length
  1. 3.66" 1 item
  2. 5.5" 1 item
  3. 6" 1 item
  4. 6.5" 1 item
  5. 7" 1 item
  6. 8" 2 items
  7. 8.3" 3 items
  8. 8.5" 3 items
  9. 9" 4 items
  10. 10.5" 9 items
  11. 11" 1 item
  12. 11.5" 7 items
  13. 12" 3 items
  14. 12.5" 8 items
  15. 13.7" 4 items
  16. 13.9" 1 item
  17. 14.5" 10 items
  18. 16" 38 items
  19. 16.3" 1 item
  20. 18" 16 items
  21. 20" 13 items
  22. 22" 12 items
Barrel Profile
  1. Dissipator 1 item
  2. Full-fluted 1 item
  3. Non-fluted 2 items
Caliber
  1. .22 ARC 2 items
  2. .223/5.56 4 items
  3. .223 Wylde 8 items
  4. .30-30 1 item
  5. .30 Cal 6 items
  6. .308 7 items
  7. .308 Win 5 items
  8. .338 1 item
  9. .357 Magnum 2 items
  10. .38/.357 Magnum 1 item
  11. .44/.45 2 items
  12. .45-70 GOVT 2 items
  13. .45 ACP 1 item
  14. .458 Socom 2 items
  15. 300 Blackout 15 items
  16. 5.56X45 5 items
  17. 5.56 NATO 52 items
  18. 5.56mm 1 item
  19. 6mm ARC 4 items
  20. 6.5 Creedmoor 6 items
  21. 6.5 Grendel 3 items
  22. 6MM Creedmoor 6 items
  23. 7.62mm 3 items
  24. 7.62x39 1 item
  25. 7.62x51 3 items
  26. 8.6 Blackout 3 items
  27. 9mm 24 items
Category
  1. Receiver Parts 142 items
  2. Parts & Kits 72 items
  3. Barrels 32 items
  4. Rifle Barrels 58 items
  5. Buffer Systems 26 items
  6. Trigger Parts 63 items
  7. Gas Systems 19 items
  8. Muzzle Devices 68 items
  9. Bolt Parts 48 items
  10. Grips 37 items
  11. Charging Handles 29 items
  12. Rifle Handguards 76 items
  13. Stocks & Braces 43 items
  14. MILSPEC Parts 4 items
Co Witness
  1. Lower 1/3 1 item
Color
Configuration
  1. AR-10 1 item
  2. AR-15 11 items
  3. Carbine 1 item
  4. Cross 1 item
  5. Curved 7 items
  6. Flaming Pig 1 item
  7. Flat 9 items
  8. Gen 1-3 1 item
  9. GEN 2 1 item
  10. Ghetto Blaster 1 item
  11. Left 1 item
  12. Left Hand 1 item
  13. M-LOK 3 items
  14. M4 Curve 1 item
  15. Rifle 1 item
  16. Straight 1 item
  17. .625 DIA 2 items
  18. .750 DIA 15 items
  19. .936 DIA 1 item
Finish
  1. Bead Blast 1 item
  2. Black 5 items
  3. Black Nitride 4 items
  4. Cerakote 5 items
  5. Chrome 1 item
  6. DLC 4 items
  7. FDE 1 item
  8. Melonite 1 item
  9. NiB-X 1 item
  10. Nickel Boron 4 items
  11. Nitride 18 items
  12. Nitromet 1 item
  13. Phosphate 2 items
  14. Polished 6 items
  15. Satin 13 items
  16. Anodize 22 items
  17. Clear Hard Anodize 3 items
  18. Quench Polish Quench (QPQ) 4 items
  19. Titanium Nitride (TiN) 2 items
Gas Block Diameter
  1. .625" 3 items
  2. .750" 42 items
  3. .875" 7 items
Gas System Length
  1. Blowback 1 item
  2. Pistol 8 items
  3. Carbine 17 items
  4. Mid 34 items
  5. Intermediate 10 items
  6. Rifle 15 items
  7. Rifle +1 2 items
  8. Rifle +2 4 items
Height
  1. Absolute Co-Witness 2 items
Inside Diameter
  1. 1.315" 3 items
  2. 1.34" 2 items
  3. 1.42" 1 item
  4. 1.45" 1 item
  5. 1.5" 1 item
  6. 1.55" 1 item
Is Firearms?
  1. No 717 items
Manufacturer
  1. A3 Tactical 9 items
  2. Advanced Armament Company (AAC) 1 item
  3. Aero Precision 51 items
  4. Aeroknox 8 items
  5. Agency Arms 1 item
  6. ALG Defense 2 items
  7. Angstadt Arms 10 items
  8. Apex Tactical Specialties 1 item
  9. Armaspec 8 items
  10. Arms Republic 5 items
  11. Ascalon Arms 4 items
  12. Brügger & Thomet (B&T) 1 item
  13. B5 Systems 1 item
  14. Ballistic Advantage 25 items
  15. Battle Arms Development 35 items
  16. Blackout Defense 8 items
  17. Blitzkrieg Components 2 items
  18. Bootleg 2 items
  19. Bravo Company MFG (BCM) 28 items
  20. Centurion Arms 3 items
  21. Chisel Machining 1 item
  22. Cross Machine Tool (CMT) 8 items
  23. Daniel Defense 2 items
  24. Dead Air Armament 1 item
  25. Dead Foot Arms LLC 3 items
  26. Drew Meyers Defense 4 items
  27. Driven Arms Co. 3 items
  28. Elftmann Tactical 1 item
  29. Emissary Development 2 items
  30. Ergo Grips 7 items
  31. F5 MFG 12 items
  32. Faxon Firearms 35 items
  33. Fortis MFG 9 items
  34. Forward Controls Design 5 items
  35. FosTecH 2 items
  36. Gear Head Works 1 item
  37. Geissele 23 items
  38. Grand Power 1 item
  39. Grey Birch MFG 6 items
  40. Grey Ghost Precision 1 item
  41. Griffin Armament 7 items
  42. HB Industries 5 items
  43. HERA ARMS 6 items
  44. Heresy Design 1 item
  45. Hiperfire 14 items
  46. HUXWRX 3 items
  47. Icon Defense 1 item
  48. James Madison Tactical (JMT) 1 item
  49. JK Armament 2 items
  50. JMAC Customs 8 items
  51. JP Enterprises Inc 8 items
  52. Kinetic Development Group 5 items
  53. Knight’s Armament Company (KAC) 12 items
  54. KNS Precision 1 item
  55. Kalashnikov USA 2 items
  56. Krebs Customs 2 items
  57. KynSHOT 3 items
  58. Lantac 13 items
  59. Lewis Machine & Tool (LMT) 13 items
  60. Mad Pig 1 item
  61. Magpul Industries 10 items
  62. Matador Arms 1 item
  63. Midwest Industries 23 items
  64. NEMO Arms 4 items
  65. Next Level Armament 1 item
  66. Noveske 27 items
  67. Obsidian Arms 1 item
  68. Patriot Ordnance Factory (POF) 1 item
  69. Precision Armament 5 items
  70. Primary Weapon Systems 6 items
  71. Q, LLC 4 items
  72. R&D Precision 1 item
  73. Radian Weapons 4 items
  74. Rainier Arms, LLC 45 items
  75. Rainier Industries 3 items
  76. RS Regulate 1 item
  77. SB Tactical 3 items
  78. Sharps Bros 7 items
  79. Sig Sauer 2 items
  80. Silencerco 9 items
  81. Sionics Weapon Systems 5 items
  82. SLR Rifleworks 4 items
  83. Sons of Liberty Gun Works 11 items
  84. Spinta Precision 1 item
  85. Sprinco (Tactical Springs) 2 items
  86. Springer Precision 1 item
  87. Stern Defense 3 items
  88. Strike Industries 1 item
  89. Surefire 10 items
  90. Taran Tactical Innovations 1 item
  91. Timney Triggers 4 items
  92. Triggertech 6 items
  93. Troy Industries 7 items
  94. TruCalibre 3 items
  95. Tyrant Designs 4 items
  96. V Seven Weapon Systems 21 items
  97. VLTOR 6 items
  98. WMD Guns 5 items
  99. WOOX 1 item
Model
  1. CZ Bren 2 items
  2. CZ Scorpion 6 items
  3. FNH Scar 1 item
  4. H&K G36 1 item
  5. IWI Galil 1 item
  6. Remington 700 2 items
  7. Sig MCX 4 items
  8. Sig MPX 1 item
Mount
  1. KeyMod 7 items
  2. M-LOK 58 items
  3. Picatinny 23 items
Option
  1. AK-47/74 4 items
  2. AR-9 8 items
  3. AR-10 17 items
  4. AR-15 109 items
  5. Standard 2 items
  6. Orange - Extra Extra Power 1 item
  7. SRS-C 3.3 oz. 1 item
  8. SRS-H 3.8 oz. 1 item
  9. SRS-H2 4.7 oz. 1 item
  10. SRS-H3 5.6 oz. 1 item
  11. SRS-BB 5.7 oz. 1 item
  12. SRS-9mm 6.4 oz. 1 item
  13. SRS-AR10 5.7 oz. 1 item
  14. Remington 700 Short Action BDL 1 item
  15. Remington 700 Long Action BDL 1 item
  16. Sauer 100 1 item
  17. WA 1 item
  18. KS 1 item
  19. 9mm 1 item
  20. CZ 11 items
  21. FNH 1 item
  22. Glock 3 items
  23. Heckler & Koch 1 item
  24. Remington 1 item
  25. Small Lever 1 item
  26. Large Lever 2 items
  27. AKM 1 item
  28. Adjustable 3 items
  29. Non-Adjustable 14 items
  30. MCS 2 items
  31. Full Size 2 items
Platform
  1. AR-10/LR308 6 items
  2. AR-15 64 items
  3. AK47/74 5 items
  4. CZ-USA 7 items
  5. FNH 1 item
  6. IWI 1 item
  7. Remington 2 items
  8. Remington 700 6 items
  9. Ruger 3 items
  10. Savage Small Shank 5 items
  11. Sig Sauer 6 items
Price
  1. $0.00 - $99.99 244 items
  2. $100.00 - $199.99 178 items
  3. $200.00 - $299.99 127 items
  4. $300.00 - $399.99 50 items
  5. $400.00 - $499.99 60 items
  6. $500.00 - $599.99 19 items
  7. $600.00 - $699.99 10 items
  8. $700.00 - $799.99 20 items
  9. $800.00 - $899.99 6 items
  10. $900.00 and above 3 items
Product Type
  1. 80% Lower 2 items
  2. Accessory 1 item
  3. Angled Grip 4 items
  4. Anti Walk Pins 3 items
  5. AR-10/LR308 Barrel 3 items
  6. AR-10 / LR 308 Charging Handle 3 items
  7. AR-10 Complete Upper Receiver 1 item
  8. AR-10 Partial Upper Receiver 1 item
  9. AR-10 Handguard 5 items
  10. AR-10 Receiver Set 3 items
  11. AR-10 Stripped Lower Receiver 2 items
  12. AR-10 Stripped Upper Receiver 3 items
  13. AR-15 Assembled Upper Receiver 2 items
  14. AR-15 Barrel 18 items
  15. AR-15 Charging Handle 15 items
  16. AR-15 Complete Lower Receiver 22 items
  17. AR-15 Complete Upper Receiver 7 items
  18. AR-15 Partial Upper Receiver 21 items
  19. AR-15 Handguard 28 items
  20. AR-15 Receiver Set 8 items
  21. AR-15 Stripped Lower Receiver 23 items
  22. AR-15 Stripped Upper Receiver 19 items
  23. AR-9 Lower Receiver 4 items
  24. AR-9 Complete Lower Receiver 1 item
  25. AR-9 Receiver Set 1 item
  26. AR-9 Upper Receiver 6 items
  27. Barrel 57 items
  28. Blast Shield 2 items
  29. Bolt 6 items
  30. Bolt-Action Barrel 11 items
  31. Bolt Carrier Group 37 items
  32. Bolt Catch 5 items
  33. Brace 7 items
  34. Buffer 8 items
  35. Buffer Kit 6 items
  36. Buffer Spring 1 item
  37. Buffer Tube 9 items
  38. Builders Kit 1 item
  39. Cam Pin 1 item
  40. Castle Nut / End Plate 1 item
  41. Charging Handle 8 items
  42. Chassis 7 items
  43. Compensator 6 items
  44. Complete Upper 6 items
  45. Dust Cover 2 items
  46. End Cap 2 items
  47. End Plate 2 items
  48. Firing Pin 3 items
  49. Flash Hider 18 items
  50. Forearm Accesory 5 items
  51. Forward Assist 1 item
  52. Gas Block 15 items
  53. Gas Tube 2 items
  54. Grip Module 1 item
  55. Gunsmithing Tool 1 item
  56. Handguard 29 items
  57. Handgun 1 item
  58. Handstop 15 items
  59. Iron Sight 1 item
  60. Lower Parts Kit 9 items
  61. Magazine Catch 2 items
  62. Magazine Release 6 items
  63. Magwell 1 item
  64. Muzzle Brake 36 items
  65. Muzzle Device Accessory 6 items
  66. Parts Kit 2 items
  67. Patch 1 item
  68. Pistol Grip 11 items
  69. Piston System 1 item
  70. Port Door 1 item
  71. Port Door Rod 3 items
  72. Rail Adapter 2 items
  73. Rail Panel 3 items
  74. Rail Section 2 items
  75. Recoil Spring 1 item
  76. Retainer Pin 1 item
  77. Safety Selector 15 items
  78. Scope Mount 1 item
  79. Shim Set 1 item
  80. Silent Captured Spring 1 item
  81. Sling Mount 2 items
  82. Spring 1 item
  83. Stock 26 items
  84. Stock Accessory 3 items
  85. Stock Adapter 6 items
  86. Take Down / Pivot Pins 6 items
  87. Trigger 54 items
  88. Trigger / Hammer Pins 1 item
  89. Trigger Guard 3 items
  90. Trigger Spring 1 item
  91. Upper Parts Kit 1 item
  92. Vertical Grip 6 items
  93. Weight 1 item
Rail Length
  1. 3" 1 item
  2. 4" 1 item
  3. 5" 2 items
  4. 5.5" 1 item
  5. 6.0" 2 items
  6. 6.25" 1 item
  7. 6.7" 4 items
  8. 7" 4 items
  9. 7.25" 2 items
  10. 8" 2 items
  11. 8.25" 1 item
  12. 9" 5 items
  13. 9.5" 4 items
  14. 9.55" 1 item
  15. 9.6" 3 items
  16. 10" 13 items
  17. 10.5" 5 items
  18. 10.7" 1 item
  19. 10.75" 1 item
  20. 11" 1 item
  21. 11.5" 3 items
  22. 12" 12 items
  23. 12.25" 1 item
  24. 12.4" 2 items
  25. 12.5" 2 items
  26. 12.625" 1 item
  27. 13" 8 items
  28. 13.5" 4 items
  29. 13.6" 4 items
  30. 13.625" 2 items
  31. 13.7" 4 items
  32. 13.8" 2 items
  33. 14" 2 items
  34. 15" 24 items
  35. 15.3" 2 items
  36. 16" 1 item
  37. 16.5" 1 item
  38. 17" 1 item
  39. 18" 1 item
Size
  1. 35mm rings 2 items
  2. BACK STRAP:Large 1 item
  3. BACK STRAP:Medium 2 items
  4. 3 Slot 2 items
  5. 5 Slot 2 items
  6. 7 Slot 2 items
  7. 9 Slot 12 items
Thread Pitch
  1. 1.125x28 1 item
  2. 1.375-24 1 item
  3. 1/2x28 68 items
  4. 1/2x36 1 item
  5. 5/8x24 41 items
  6. 5/8x32 1 item
  7. 11/16x24 1 item
  8. M14x1 LH 1 item
  9. M24x1.5 RH 2 items
Threaded
  1. Yes 26 items
Twist Rate
  1. 1:3 2 items
  2. 1:7 30 items
  3. 1:7.5 10 items
  4. 1:8 11 items
  5. 1:10 11 items
Stock Status
  1. Out of stock 717 items Remove This Item
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