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  4. Maxim Defense MDX 510 300 Blk Mil-Spec Complete Upper - 10.3" Black
    Maxim Defense MDX 510 300 Blk Mil-Spec Complete Upper - 10.3" Black
    $1,255.50
    As low as $45.38/mo with . Learn More
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Barrel Length
  1. 4" 1 item
  2. 5" 2 items
  3. 5.5" 11 items
  4. 6" 1 item
  5. 7" 2 items
  6. 7.5" 4 items
  7. 7.75" 1 item
  8. 7.94" 1 item
  9. 8" 4 items
  10. 8.3" 2 items
  11. 8.5" 7 items
  12. 8.75" 1 item
  13. 9" 3 items
  14. 9.5" 1 item
  15. 9.75" 1 item
  16. 10.3" 14 items
  17. 10.5" 13 items
  18. 10.7" 1 item
  19. 11" 1 item
  20. 11.5" 10 items
  21. 11.85" 2 items
  22. 12" 1 item
  23. 12.5" 5 items
  24. 13" 3 items
  25. 13.7" 4 items
  26. 14.5" 14 items
  27. 16" 26 items
  28. 16.1" 1 item
  29. 16.25" 1 item
  30. 16.5" 1 item
  31. 18" 6 items
Barrel Profile
  1. MK12 SPR 1 item
  2. Non-fluted 3 items
Caliber
  1. .22 ARC 1 item
  2. .22 LR 2 items
  3. .223/5.56 3 items
  4. .223 Wylde 6 items
  5. .308 1 item
  6. .45 ACP 1 item
  7. 300 Blackout 23 items
  8. 5.56X45 6 items
  9. 5.56 NATO 59 items
  10. 6mm ARC 1 item
  11. 7.62x39 6 items
  12. 9mm 19 items
Category
  1. Stripped Lower Receivers 67 items
  2. Complete Lowers 37 items
  3. Stripped Upper Receivers 50 items
  4. Complete Upper Receivers 91 items
  5. Partial Upper Receivers 51 items
  6. Receiver Sets 26 items
  7. Chassis 38 items
Color
Configuration
  1. AR-10 1 item
  2. AR-15 2 items
  3. M-LOK 1 item
  4. Mil-Spec 1 item
  5. Rifle 2 items
  6. Type 1 Trunnion 1 item
  7. Type 2 Trunnion 1 item
Finish
  1. Arid 2 items
  2. Black 2 items
  3. Black Anodize 1 item
  4. Cerakote 10 items
  5. FDE 1 item
  6. Anodize 27 items
  7. Clear Hard Anodize 4 items
  8. Quench Polish Quench (QPQ) 1 item
Gas Block Diameter
  1. .750" 32 items
Gas System
  1. Blowback 1 item
  2. Pistol 8 items
  3. Carbine 16 items
  4. Mid 28 items
  5. Intermediate 1 item
  6. Rifle 3 items
Height
  1. Absolute Co-Witness 1 item
Inside Diameter
  1. 1.3" 1 item
  2. 1.6" 1 item
Manufacturer
  1. A3 Industries 3 items
  2. Aero Precision 34 items
  3. Airborne Arms 2 items
  4. Andro Corp Industries 1 item
  5. Angstadt Arms 4 items
  6. Brügger & Thomet (B&T) 1 item
  7. Ballistic Advantage 6 items
  8. Bootleg 2 items
  9. Bravo Company MFG (BCM) 33 items
  10. Centurion Arms 3 items
  11. Cross Machine Tool (CMT) 3 items
  12. Daniel Defense 10 items
  13. Dead Foot Arms LLC 2 items
  14. Faxon Firearms 4 items
  15. Fightlite Industries 1 item
  16. Form Rifle 10 items
  17. Fortis MFG 4 items
  18. Forward Controls Design 3 items
  19. Geissele 3 items
  20. Grey Birch MFG 6 items
  21. Griffin Armament 2 items
  22. Half Cocked Arms (HCA) 1 item
  23. Heckler & Koch 2 items
  24. HERA ARMS 1 item
  25. Heresy Design 1 item
  26. Icarus Precision 2 items
  27. Icon Defense 4 items
  28. JL Billet 3 items
  29. JP Enterprises Inc 2 items
  30. Lantac 4 items
  31. Lee Sporting 4 items
  32. Lewis Machine & Tool (LMT) 15 items
  33. Magpul Industries 4 items
  34. Matador Arms 2 items
  35. Maxim Defense 17 items
  36. MCM Firearms 1 item
  37. Mega Arms 1 item
  38. NEMO Arms 1 item
  39. Next Level Armament 6 items
  40. Noveske 14 items
  41. Patriot Ordnance Factory (POF) 2 items
  42. Primary Weapon Systems 11 items
  43. Q, LLC 2 items
  44. Quarter Circle 10 5 items
  45. R&D Precision 3 items
  46. Radian Weapons 5 items
  47. Rainier Arms, LLC 27 items
  48. Rise Armament 2 items
  49. RogueOps 3 items
  50. Sharps Bros 22 items
  51. Sig Sauer 4 items
  52. Silencerco 2 items
  53. Sionics Weapon Systems 3 items
  54. SLR Rifleworks 3 items
  55. Sons of Liberty Gun Works 20 items
  56. Stern Defense 4 items
  57. Tactical Edge Arms 1 item
  58. True Precision 2 items
  59. V Seven Weapon Systems 12 items
  60. VKTR Industries 2 items
  61. VLTOR 2 items
  62. WMD Guns 1 item
  63. WOOX 5 items
Model
  1. Sig MCX 2 items
Mount
  1. M-LOK 43 items
  2. Picatinny 7 items
Optic Footprint
  1. Aimpoint Acro 1 item
Option
  1. AR-9 8 items
  2. AR-10 11 items
  3. AR-15 83 items
  4. FN 509 1 item
  5. Remington 700 Short Action 2 items
  6. Remington 700 Short Action BDL 1 item
  7. Remington 700 Long Action BDL 1 item
  8. Sauer 100 1 item
  9. WA 2 items
  10. KS 2 items
  11. Glock 2 items
  12. Remington 1 item
  13. Sharps Bros 1 item
  14. MCS 2 items
  15. Full Size 2 items
Platform
  1. 10-22 3 items
  2. AR-9 2 items
  3. AR-10/LR308 7 items
  4. AR-15 81 items
  5. CZ 1 item
  6. H&K 1 item
  7. Ruger 5 items
  8. Sig Sauer 3 items
Price
  1. $0.00 - $999.99 289 items
  2. $1,000.00 - $1,999.99 63 items
  3. $2,000.00 - $2,999.99 8 items
  4. $4,000.00 and above 2 items
Product Type
  1. 10/22 Receiver 3 items
  2. AR-10 Complete Lower Receiver 1 item
  3. AR-10 Complete Upper Receiver 2 items
  4. AR-10 Partial Upper Receiver 3 items
  5. AR-10 Receiver Set 6 items
  6. AR-10 Stripped Lower Receiver 5 items
  7. AR-10 Stripped Upper Receiver 3 items
  8. AR-15 Assembled Upper Receiver 6 items
  9. AR-15 Complete Lower Receiver 35 items
  10. AR-15 Complete Upper Receiver 65 items
  11. AR-15 Partial Upper Receiver 44 items
  12. AR-15 Receiver Set 18 items
  13. AR-15 Rifle 1 item
  14. AR-15 Stripped Lower Receiver 55 items
  15. AR-15 Stripped Upper Receiver 36 items
  16. AR-15 Upper Receiver Group 1 item
  17. AR-9 Lower Receiver 3 items
  18. AR-9 Complete Lower Receiver 2 items
  19. AR-9 Partial Upper Receiver 1 item
  20. AR-9 Receiver Set 2 items
  21. AR-9 Upper Receiver 9 items
  22. Builders Kit 1 item
  23. Chassis 37 items
  24. Complete Upper 18 items
  25. Grip Module 1 item
  26. Lower Receiver 5 items
  27. Partial Upper Receiver 1 item
  28. Parts Kit 1 item
  29. Suppressor 1 item
Rail Length
  1. 3.25" 1 item
  2. 5" 2 items
  3. 6.0" 2 items
  4. 6.375" 1 item
  5. 6.91" 1 item
  6. 7" 6 items
  7. 7.25" 1 item
  8. 8" 3 items
  9. 8.5" 1 item
  10. 9" 1 item
  11. 9.2" 1 item
  12. 9.25" 1 item
  13. 9.3" 1 item
  14. 9.5" 8 items
  15. 9.55" 4 items
  16. 9.59" 1 item
  17. 9.75" 4 items
  18. 10" 7 items
  19. 10.5" 3 items
  20. 10.7" 2 items
  21. 10.75" 1 item
  22. 11" 2 items
  23. 11.5" 3 items
  24. 11.7" 2 items
  25. 11.75" 1 item
  26. 12" 3 items
  27. 12.5" 3 items
  28. 12.6" 1 item
  29. 12.75" 1 item
  30. 13" 3 items
  31. 13.25" 2 items
  32. 13.5" 2 items
  33. 13.7" 2 items
  34. 14" 6 items
  35. 15" 15 items
  36. 15.25" 1 item
  37. 15.3" 1 item
  38. 15.5" 2 items
  39. 16" 1 item
Size
  1. 5 Slot 1 item
  2. 9 Slot 1 item
Thread Pitch
  1. 1/2x28 (9mm) 4 items
  2. 1/2x28 (.22 cal) 37 items
  3. 1/2x36 1 item
  4. 5/8x24 (.30 cal) 13 items
Threaded
  1. Yes 25 items
  2. No 1 item
Twist Rate
  1. 1:6 1 item
  2. 1:7 44 items
  3. 1:8 3 items
  4. 1:10 3 items
  5. 1:16 1 item
Stock Status
  1. In stock 138 items
  2. Out of stock 224 items
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