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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 1-16 of 2623

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  1. Maxim Defense M-RAX Attachment Rail - FDE
    Maxim Defense M-RAX Attachment Rail - FDE
    $37.76 - $61.16
    View Details
  2. Maxim Defense M-RAX Attachment Rail - Black
    Maxim Defense M-RAX Attachment Rail - Black
    $35.96 - $60.26
    View Details
  3. Rainier Arms AR-15 Precision Match Grade BCG - Nitride
    Rainier Arms AR-15 Precision Match Grade BCG - Nitride
    $169.95
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  4. Sharps Bros THE JACK AR-15 Lower Receiver - Gen 2
    Sharps Bros THE JACK AR-15 Lower Receiver - Gen 2
    $275.45
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  5. Sharps Bros Warthog AR-15 Lower Receiver - Gen 2
    Sharps Bros Warthog AR-15 Lower Receiver - Gen 2
    $265.95
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  6. Bravo Company MFG (BCM) MK2 Receiver Extension
    Bravo Company MFG (BCM) MK2 Receiver Extension
    $49.95
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  7. Next Level Armament NLX-8NS 7.62/.308 Comp / Flash Suppressor
    Next Level Armament NLX-8NS 7.62/.308 Comp / Flash Suppressor
    $70.00
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  8. American Trigger Company (ATC) AR Gold Adjustable Trigger
    American Trigger Company (ATC) AR Gold Adjustable Trigger
    $279.00
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  9. Next Level Armament NLX-10 7.62/.308 Speed Brake
    Next Level Armament NLX-10 7.62/.308 Speed Brake
    $70.00
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  10. Stern Defense AR 9mm MOD4 MLOK Complete Upper - 4
    Stern Defense AR 9mm MOD4 MLOK Complete Upper - 4"
    $419.27
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  11. V Seven Weapon Systems 7075 Billet EX Enlightened AR15 Lower
    V Seven Weapon Systems 7075 Billet EX Enlightened AR15 Lower
    $287.12
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  12. Precision Armament - M41 Severe-Duty Muzzle Brake .308/ 7.62mm - Stainless
    Precision Armament - M41 Severe-Duty Muzzle Brake .308/ 7.62mm - Stainless
    $104.49
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  13. Radian Weapons AR10/SR25 Raptor SD Ambidextrous Charging Handle - Black
    Radian Weapons AR10/SR25 Raptor SD Ambidextrous Charging Handle - Black
    $149.95
    View Details
  14. CMC Trigger 2 Stage Curve 1/3
    CMC Trigger 2 Stage Curve 1/3
    $201.60
    View Details
  15. Rainier Arms AR-15 Urban Combat M-Lok Handguard
    Rainier Arms AR-15 Urban Combat M-Lok Handguard
    $153.99 - $167.99
    View Details
  16. Schmeisser AR15 Free Float KeyMod Handguard
    Schmeisser AR15 Free Float KeyMod Handguard
    $119.99 - $165.95
    View Details
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Items 1-16 of 2623

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Shopping Options
Category
  1. Bolt Parts 121 item
  2. Buffer Systems 99 item
  3. Charging Handles 98 item
  4. Gas Systems 98 item
  5. Grips 207 item
  6. Muzzle Devices 291 item
  7. Parts & Kits 334 item
  8. Receiver Parts 422 item
  9. Rifle Barrels 238 item
  10. Rifle Handguards 318 item
  11. Stocks & Braces 189 item
  12. Trigger Parts 195 item
Price
  1. Less than $10 63 item
  2. $10 to $25 275 item
  3. $25 to $50 331 item
  4. $50 to $100 488 item
  5. $100 to $250 818 item
  6. $250 to $500 405 item
  7. $500 to $1000 165 item
  8. Greater than $1000 56 item
Manufacturer
  1. 21st Tec 6 item
  2. A3 Tactical 31 item
  3. ALG Defense 6 item
  4. Accu-Tac 2 item
  5. Aero Precision 73 item
  6. Aeroknox 8 item
  7. Agency Arms 1 item
  8. Airborne Arms 6 item
  9. American Trigger Company (ATC) 3 item
  10. Andro Corp Industries 8 item
  11. Angstadt Arms 13 item
  12. Apex Machining Company 2 item
  13. Apex Tactical Specialties 5 item
  14. Arisaka 6 item
  15. Armaspec 15 item
  16. Arms Republic 15 item
  17. Ascalon Arms 11 item
  18. B5 Systems 8 item
  19. BOBRO 1 item
  20. BSF Barrels 1 item
  21. Ballistic Advantage 44 item
  22. Battle Arms Development 57 item
  23. Black River MFG 1 item
  24. Blackout Defense 10 item
  25. Blitzkrieg Components 17 item
  26. Bootleg 6 item
  27. Bravo Company MFG (BCM) 97 item
  28. Breek Arms 11 item
  29. Brigand Arms 5 item
  30. Brügger & Thomet (B&T) 1 item
  31. CMC Triggers 4 item
  32. CMMG 1 item
  33. Centurion Arms 19 item
  34. Chisel Machining 5 item
  35. Christensen Arms 6 item
  36. Cobalt Kinetics 3 item
  37. Cross Machine Tool (CMT) 32 item
  38. DPM Systems Technologies 2 item
  39. Daniel Defense 24 item
  40. Dead Air Armament 6 item
  41. Dead Foot Arms LLC 13 item
  42. Devil Dog Concepts 2 item
  43. Driven Arms Co. 9 item
  44. Elftmann Tactical 18 item
  45. Emissary Development 3 item
  46. Ergo Grips 11 item
  47. F-1 Firearms 30 item
  48. F5 MFG 13 item
  49. Faxon Firearms 83 item
  50. Ferfrans 1 item
  51. Flatline Fiber Co 1 item
  52. Fortis MFG 85 item
  53. Forward Controls Design 62 item
  54. FosTecH 3 item
  55. Foxtrot Mike 6 item
  56. Gear Head Works 4 item
  57. Geissele 42 item
  58. Grand Power 1 item
  59. Grey Birch MFG 7 item
  60. Grey Ghost Precision 2 item
  61. Griffin Armament 34 item
  62. HB Industries 7 item
  63. HERA ARMS 25 item
  64. HUXWRX 5 item
  65. Half Cocked Arms (HCA) 1 item
  66. Hiperfire 20 item
  67. Icarus Precision 2 item
  68. Icon Defense 6 item
  69. Iron City Rifle Works 2 item
  70. JK Armament 16 item
  71. JL Billet 4 item
  72. JMAC Customs 63 item
  73. JP Enterprises Inc 44 item
  74. Jacob Grey 2 item
  75. James Madison Tactical (JMT) 3 item
  76. KNS Precision 17 item
  77. Kaiser US 1 item
  78. Kalashnikov USA 3 item
  79. Kaw Valley Precision 10 item
  80. Killer Innovations 1 item
  81. Kinetic Development Group 8 item
  82. Knight’s Armament Company 12 item
  83. Krebs Customs 9 item
  84. Kriss USA 8 item
  85. KynSHOT 6 item
  86. LUTH-AR 4 item
  87. Lancer Systems 6 item
  88. Lantac 27 item
  89. Law Tactical 1 item
  90. Lee Sporting 4 item
  91. Leitner-Wise 1 item
  92. Lewis Machine & Tool (LMT) 14 item
  93. MCM Firearms 1 item
  94. Magpul Industries 115 item
  95. Matador Arms 1 item
  96. Maxim Defense 23 item
  97. Mega Arms 11 item
  98. Midwest Industries 47 item
  99. Mission First Tactical 6 item
  100. Multitasker Tools 1 item
  101. NEMO Arms 7 item
  102. NIGHT FISION 1 item
  103. Neverwear Springs 2 item
  104. Next Level Armament 24 item
  105. Noveske 65 item
  106. Obsidian Arms 1 item
  107. Odin Works 10 item
  108. Orchid Defense Group 1 item
  109. Patriot Ordnance Factory (POF) 9 item
  110. Phase 5 Tactical 4 item
  111. Pioneer CNC 2 item
  112. Precision Armament 24 item
  113. Precision Reflex Inc 2 item
  114. Primary Weapon Systems 24 item
  115. Proof Research 17 item
  116. Q, LLC 2 item
  117. Quarter Circle 10 32 item
  118. R&D Precision 4 item
  119. RS Regulate 6 item
  120. Radian Weapons 19 item
  121. Rainier Arms, LLC 140 item
  122. Rainier Industries 16 item
  123. Rehv Arms 2 item
  124. Reptilia Corp 8 item
  125. Rex Silentium 1 item
  126. Riflespeed 15 item
  127. Rise Armament 22 item
  128. RogueOps 3 item
  129. Rubber City Armory 1 item
  130. SB Tactical 5 item
  131. SCALARWORKS 1 item
  132. SLR Rifleworks 10 item
  133. Schmeisser 5 item
  134. Seekins Precision 10 item
  135. Sharps Bros 30 item
  136. Shooting Innovations 2 item
  137. Sig Sauer 13 item
  138. Silencerco 17 item
  139. Sionics Weapon Systems 6 item
  140. Sons of Liberty Gun Works 40 item
  141. Spinta Precision 6 item
  142. Sprinco (Tactical Springs) 6 item
  143. Springer Precision 1 item
  144. Stag Arms 7 item
  145. Stern Defense 8 item
  146. Strike Industries 108 item
  147. Superlative Arms 14 item
  148. Surefire 16 item
  149. Tactical Edge Arms 3 item
  150. Tango Down 1 item
  151. Taran Tactical Innovations 2 item
  152. Timney Triggers 34 item
  153. Tippmann Arms 1 item
  154. Torrent Suppressors 3 item
  155. Triggertech 13 item
  156. Troy Industries 7 item
  157. TruCalibre 9 item
  158. True North Concepts 7 item
  159. Tyrant Designs 20 item
  160. Underground Tactical 2 item
  161. Unity Tactical 1 item
  162. V Seven Weapon Systems 85 item
  163. VLTOR 17 item
  164. Valhalla Tactical 2 item
  165. WMD Guns 20 item
  166. WOOX 5 item
  167. White Label Armory 2 item
  168. ZEV Technologies 5 item
Caliber
  1. .22 Cal 2 item
  2. .22 LR 4 item
  3. .223 Rem 3 item
  4. .223 Wylde 28 item
  5. .223/5.56 21 item
  6. .224 Valkyrie 1 item
  7. .30 Cal 15 item
  8. .30-30 1 item
  9. .308 17 item
  10. .308 Win 12 item
  11. .338 1 item
  12. .357 Magnum 2 item
  13. .38/.357 Magnum 1 item
  14. .44/.45 2 item
  15. .45 ACP 11 item
  16. .45-70 GOVT 2 item
  17. .458 Socom 3 item
  18. 12 Gauge 1 item
  19. 300 Blackout 49 item
  20. 300 Norma Mag 1 item
  21. 338 Lapua 2 item
  22. 5.56 NATO 130 item
  23. 5.56X45 10 item
  24. 5.56mm 8 item
  25. 6.5 Creedmoor 26 item
  26. 6.5 Grendel 11 item
  27. 6.8 SPC 2 item
  28. 6.8 SPC2 1 item
  29. 6MM Creedmoor 6 item
  30. 6mm ARC 11 item
  31. 7.62mm 5 item
  32. 7.62x39 14 item
  33. 7.62x51 13 item
  34. 8.6 Blackout 2 item
  35. 9mm 84 item
Barrel Length
  1. 10" 1 item
  2. 10.3" 13 item
  3. 10.5" 25 item
  4. 10.7" 3 item
  5. 11" 1 item
  6. 11.5" 14 item
  7. 11.85" 3 item
  8. 12" 4 item
  9. 12.3" 1 item
  10. 12.5" 11 item
  11. 13.7" 7 item
  12. 13.9" 1 item
  13. 14.5" 22 item
  14. 16" 94 item
  15. 16.1" 2 item
  16. 17" 1 item
  17. 18" 55 item
  18. 20" 24 item
  19. 22" 10 item
  20. 24" 8 item
  21. 26" 5 item
  22. 3.1" 1 item
  23. 3.66" 1 item
  24. 4" 4 item
  25. 4.5" 2 item
  26. 5" 3 item
  27. 5.5" 10 item
  28. 6" 5 item
  29. 6.5" 2 item
  30. 6.75" 1 item
  31. 7" 3 item
  32. 7.25" 1 item
  33. 7.5" 5 item
  34. 7.75" 2 item
  35. 7.94" 1 item
  36. 8" 9 item
  37. 8.3" 3 item
  38. 8.5" 11 item
  39. 9" 6 item
  40. 9.5" 1 item
  41. 9.75" 1 item
Option
  1. 1.125-28 TPI 3 Lug/Booster Adaptor 1 item
  2. 1.180-24 TPI 3 Lug/Booster Adaptor 1 item
  3. 4.720" 2 item
  4. 6.295" 2 item
  5. 7.870" 2 item
  6. 9.445" 2 item
  7. 9mm 2 item
  8. AK-47/74 7 item
  9. AKM 1 item
  10. AR-10 65 item
  11. AR-15 402 item
  12. AR-9 13 item
  13. Adjustable 17 item
  14. Blue - Enhanced Power 1 item
  15. Buffer & Spring - 9mm 2 item
  16. Buffer & Spring - H1 3 item
  17. Buffer & Spring - H2 2 item
  18. Buffer & Spring - H3 2 item
  19. Buffer & Spring - Standard 3 item
  20. Bull's Eye 1 item
  21. CZ 35 item
  22. Carbine Length 1 item
  23. FN 509 1 item
  24. FNH 2 item
  25. Front 1 item
  26. Full Size 2 item
  27. Glock 5 item
  28. Green - Rifle Length Standard Power 1 item
  29. Green Laser 2 item
  30. Heckler & Koch 1 item
  31. Holed 1 item
  32. JP Silent Captured Spring - 9mm 1 item
  33. JP Silent Captured Spring - Heavy 1 item
  34. JP Silent Captured Spring - Standard 1 item
  35. KS 2 item
  36. Large Lever 2 item
  37. Long 2 item
  38. MCS 2 item
  39. Mid 1 item
  40. Mid Length 2 item
  41. Minimal 1 item
  42. Non-Adjustable 54 item
  43. Orange - Extra Extra Power 1 item
  44. Pistol 1 item
  45. Profile 1 item
  46. Rear 1 item
  47. Red - Extra Power 1 item
  48. Remington 1 item
  49. Remington 700 Long Action BDL 1 item
  50. Remington 700 Short Action 3 item
  51. Remington 700 Short Action BDL 2 item
  52. Rifle 1 item
  53. Rifle Length 1 item
  54. SRS-9mm 6.4 oz. 2 item
  55. SRS-AR10 5.7 oz. 1 item
  56. SRS-BB 5.7 oz. 1 item
  57. SRS-C 3.3 oz. 1 item
  58. SRS-H 3.8 oz. 1 item
  59. SRS-H2 4.7 oz. 1 item
  60. SRS-H3 5.6 oz. 1 item
  61. Sauer 100 1 item
  62. Sharps Bros 1 item
  63. Short 2 item
  64. Sig Sauer 2 item
  65. Small Lever 2 item
  66. Springfield 1 item
  67. Standard 5 item
  68. Ultra Light 1 item
  69. Vertical Lines 1 item
  70. WA 2 item
  71. White - Standard Power 1 item
  72. White/Red - Intermediate Power 1 item
  73. Yellow - Reduced Power 1 item
Mount
  1. KeyMod 25 item
  2. M-LOK 229 item
  3. Other 5 item
  4. Picatinny 103 item
Stock Status
  1. In Stock 1813 item
  2. Out of Stock 810 item
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