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Choose of a huge selection of Complete Upper Kits which includes the upper assembly, bolt carrier group and charging handle, lower parts kit and stock/blade kit. Variety of Calibers, awesome savings - SHOP now and save!

Upper Kits

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Items 1-36 of 263

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  1. 16 inch 45 ACP AR Upper Kit | Pro2A Tactical
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    PRO2A 16" 45 ACP 1/16 Pistol Caliber Melonite M-LOK Upper Kit
    Special Price $569.99 $729.99
  2. 16 inch 45 ACP SC Upper Kit | Pro2A Tactical
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    PRO2A 16" 45 ACP 1/16 Pistol Caliber NR Side Charging Melonite M-LOK Upper Kit
    Rating:
    93%
    1  Review
    Special Price $789.99 $929.99
  3. 22 inch 223 WYLDE Stainless Upper Kit | MOA Guarantee
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    PRO2A 22" 223 Wylde 1/7 Rifle Length Stainless Premium AR-15 Upper Kit
    Rating:
    100%
    2  Reviews
    Special Price $569.99 $829.99
  4. 12.5 inch 300 Blackout AR-15 Upper Kit | Pro2A Tactical
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    PRO2A 12.5" 300 Blackout 1/8 Pistol Length Melonite AR-15 Upper with Flash Can Kit
    Rating:
    90%
    1  Review
    Special Price $539.99 $789.99
  5. 12.5 inch 300 Blackout AR-15 Side Charging Upper Kit | Pro2A Tactical
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    PRO2A 12.5" 300 Blackout 1/8 Pistol Length NR Side Charging Melonite AR-15 Upper Kit
    Special Price $759.99 $949.99
  6. 22 inch 5.56 NATO AR-15 Upper Kit | 100% US MADE
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    PRO2A 22" 5.56 NATO 1/7 Rifle Length Melonite AR-15 Upper Kit
    Rating:
    100%
    1  Review
    Special Price $529.99 $799.99
  7. 9 inch 300 Blackout AR-15 Upper Kit | Pro2A Tactical
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    PRO2A 9" 300 Blackout 1/7 Pistol Length Melonite AR-15 Upper Kit
    Special Price $499.99 $729.99
    Out of stock
  8. 9 inch 300 Blackout AR-15 Upper Kit w/Can | Pro2A Tactical
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    PRO2A 9" 300 Blackout 1/7 Pistol Length Melonite AR-15 Upper with Flash Can Kit
    Special Price $529.99 $759.99
    Out of stock
  9. 9 inch 300 Blackout NR Side Charging Upper Kit | Pro2A Tactical
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    PRO2A 9" 300 Blackout 1/7 Pistol Length NR Side Charging Melonite AR-15 Upper with Flash Can Kit
    Special Price $769.99 $969.99
    Out of stock
  10. 18 inch 6.5 Grendel Upper Kit | 100% US MADE
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    PRO2A 18" 6.5 Grendel 1/8 Mid Length Melonite M-LOK AR-15 Upper Kit
    Rating:
    73%
    1  Review
    Special Price $599.99 $729.99
  11. 12.5 inch 6.5 Grendel AR-15 Upper Kit | Pro2A Tactical
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    PRO2A 12.5" 6.5 Grendel 1/8 Carbine Length Melonite M-LOK AR-15 Upper Kit
    Rating:
    100%
    2  Reviews
    Special Price $559.99 $729.99
  12. 11.5 inch 5.56 NATO AR Upper Kit | Pro2A Tactical
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    PRO2A 11.5" 5.56 NATO 1/7 Carbine Length Melonite AR-15 Upper Kit
    Rating:
    100%
    2  Reviews
    Special Price $459.99 $719.99
  13. 11.5 inch 5.56 NATO AR-15 Upper Kit | Pro2A Tactical
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    PRO2A 11.5" 5.56 NATO 1/7 Carbine Length Melonite AR-15 Upper with Flash Can Kit
    Rating:
    100%
    2  Reviews
    Special Price $489.99 $759.99
  14. 11.5 inch 5.56 NATO AR-15 Side Charging Upper Kit | Pro2A Tactical
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    PRO2A 11.5" 5.56 NATO 1/7 Carbine Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can Kit
    Rating:
    90%
    2  Reviews
    Special Price $739.99 $939.99
  15. 16 inch 300 Blackout AR-15 Upper Kit | Pro2A Tactical
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    PRO2A 16" 300 Blackout 1/8 Pistol Length Melonite AR-15 Upper Kit
    Rating:
    100%
    1  Review
    Special Price $489.99 $689.99
  16. 20 inch 6.5 Grendel AR-15 Upper Kit | Fast Shipping
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    PRO2A 20" 6.5 Grendel 1/8 Rifle Length Melonite M-LOK AR-15 Upper Kit
    Rating:
    80%
    1  Review
    Special Price $609.99 $739.99
  17. 18 inch 7.62x39 AR Upper Kit | Top Quality
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    PRO2A 18" 7.62x39 1/10 Carbine Length Melonite M-LOK AR-15 Upper Kit
    Rating:
    100%
    1  Review
    Special Price $509.99 $759.99
  18. 20 inch 224 Valkyrie AR-15 Upper Kit | 100% US MADE
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    PRO2A 20" 224 Valkyrie 1/6.5 Rifle Length Melonite M-LOK AR-15 Upper Kit
    Rating:
    100%
    1  Review
    Special Price $599.99 $809.99
  19. 20 inch 223 WYLDE Stainless Upper Kit | Match Grade
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    PRO2A 20" 223 Wylde 1/7 Rifle Length Stainless Premium AR-15 Upper Kit
    Rating:
    87%
    1  Review
    Special Price $549.99 $809.99
  20. 13.7 inch 5.56 NATO AR Side Charging Upper Kit | Pro2A Tactical
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    PRO2A 13.7" 5.56 NATO 1/7 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can Kit
    Special Price $779.99 $999.99
  21. 5 inch AR-15 AR15 Non Reciprocating Side Charging 7.62x39 Melonite Upper w/Can Kit
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    PRO2A 5" 7.62x39 1/10 Micro Length NR Side Charging Melonite AR-15 Upper with Flash Can Kit
    Rating:
    87%
    1  Review
    Special Price $759.99 $929.99
  22. 16 inch 6.8 SPC II AR-15 Upper Kit | Pro2A Tactical
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    PRO2A 16" 6.8 SPC II 1/11 Carbine Length Melonite M-LOK AR-15 Upper Kit
    Rating:
    93%
    1  Review
    Special Price $579.99 $739.99
  23. 16 inch 450 Bushmaster AR Upper Kit | Pro2a Tactical
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    PRO2A 16" 450 Bushmaster 1/24 Carbine Length Melonite M-LOK AR-15 Upper Kit
    Rating:
    93%
    1  Review
    Special Price $649.99 $829.99
  24. 18 inch 450 Bushmaster Upper Kit - Made in the USA
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    PRO2A 18" 450 Bushmaster 1/24 Mid Length Melonite M-LOK AR-15 Upper Kit
    Special Price $679.99 $869.99
  25. 8 inch AR-15 5.56 NATO Pistol M-LOK Nitride Upper Complete Kit | 100% USA MADE | Fast Shipping
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    PRO2A 8" 5.56 NATO 1/7 Pistol Length Melonite AR-15 Upper Kit
    Rating:
    100%
    2  Reviews
    Special Price $449.99 $719.99
  26. 16 inch 300 Blackout Side Charging Upper Kit | Pro2A Tactical
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    PRO2A 16" 300 Blackout 1/8 Pistol Length NR Side Charging Melonite AR-15 Upper with Flash Can Kit
    Rating:
    100%
    1  Review
    Special Price $779.99 $999.99
  27. 10.5 inch 7.62x39 AR-15 Upper Kit | Pro2A Tactical
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    PRO2A 10.5" 7.62x39 1/10 Carbine Length Melonite AR-15 Upper Kit
    Rating:
    87%
    1  Review
    Special Price $479.99 $759.99
  28. 10.5 inch 7.62x39 Upper Kit w/Can | Pro2A Tactical
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    PRO2A 10.5" 7.62x39 1/10 Carbine Length Melonite AR-15 Upper with Flash Can Kit
    Special Price $509.99 $799.99
  29. 16 inch 5.56 NATO AR-15 Upper Kit | NR Side Charging
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    PRO2A 16" 5.56 NATO 1/7 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper Kit
    Rating:
    93%
    1  Review
    Special Price $759.99 $969.99
  30. 7.5 inch AR-15 5.56 NATO Pistol M-LOK Melonite / Nitride Complete Upper Kit | Pro2A Tactical
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    PRO2A 7.5" 5.56 NATO 1/7 Pistol Length Melonite AR-15 Upper Kit
    Rating:
    92%
    2  Reviews
    Special Price $439.99 $669.99
  31. 7.5 inch AR-15 AR-155.56 NATO Pistol M-LOK Nitride Upper w/Can Complete Kit with LPK, Stock Kit
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    PRO2A 7.5" 5.56 NATO 1/7 Pistol Length Melonite AR-15 Upper with Flash Can Kit
    Rating:
    100%
    1  Review
    Special Price $469.99 $709.99
  32. 10.5 inch 5.56 NATO AR-15 Upper Kit | Pro2A Tactical
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    PRO2A 10.5" 5.56 NATO 1/7 Carbine Length Melonite AR-15 Upper Kit
    Rating:
    100%
    2  Reviews
    Special Price $459.99 $709.99
  33. 10.5 inch 5.56 NATO AR Upper Kit w/Can | Pro2A Tactical
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    PRO2A 10.5" 5.56 NATO 1/7 Carbine Length Melonite AR-15 Upper with Flash Can Kit
    Rating:
    100%
    1  Review
    Special Price $489.99 $749.99
  34. 7.5 inch AR-15 AR AR15 300 BLACKOUT Pistol M-LOK Nitride Upper kit | Pro2A Tactical
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    PRO2A 7.5" 300 Blackout 1/7 or 1/5 Pistol Length Melonite AR-15 Upper Kit
    Rating:
    100%
    1  Review
    Special Price $449.99 $639.99
  35. 7.5 inch AR-15 300 BLACKOUT Nitride Pistol Upper w/Can Complete kit | Pro2A Tactical
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    PRO2A 7.5" 300 Blackout 1/7 or 1/5 Pistol Length Melonite AR-15 Upper with Flash Can Kit
    Special Price $479.99 $679.99
  36. 8.5 inch AR-15 300 BLACKOUT Upper kit | Pro2A Tactical
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    PRO2A 8.5" 300 Blackout 1/7 Pistol Length Melonite AR-15 Upper Kit
    Special Price $459.99 $659.99
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Category
  1. 223/5.56 56item
  2. 300 Blackout 27item
  3. 7.62x39 14item
  4. 350 Legend 16item
  5. 224 Valkyrie 4item
  6. 6.5 Grendel 11item
  7. 6mm ARC 8item
  8. 6.8 SPC II 8item
  9. 9x39 9item
  10. 458 Socom 8item
  11. 450 Bushmaster 12item
  12. 12.7x42 (50 Beowulf) 6item
  13. 9mm 27item
  14. 40 S&W 18item
  15. 45 ACP 21item
  16. 10mm 18item
Price
  1. $400.00 - $499.99 43item
  2. $500.00 - $599.99 70item
  3. $600.00 - $699.99 36item
  4. $700.00 - $799.99 65item
  5. $800.00 - $899.99 42item
  6. $900.00 and above 7item
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