5.56 NATO is a widely used rifle cartridge developed for military and sporting applications, known for its reliability and versatility in AR-15 platforms. While not a manufacturer, many firearms companies produce 5.56 NATO specific parts, including barrels, upper receivers, bolt carrier groups, magazines, and complete rifles or build kits. These components are popular among shooters and builders seeking dependable, high performance solutions for tactical, sporting, and home defense use. If you need details on a specific manufacturer of 5.56 NATO parts, let me know!

5.56 NATO Barrels

20″ 5.56 NATO AR-15 Complete Upper – 15″ M-LOK, 1:8 Twist – Black

4.64 out of 5

Original price was: $329.00.Current price is: $269.95.

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10.5″ 5.56 AR-15 Pistol Upper – 10″ Quad Rail, 1:7 Twist – Black

5.00 out of 5

Original price was: $369.95.Current price is: $199.95.

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16″ 5.56 AR-15 Complete Upper – Nitride Barrel 15″ M-LOK, 1:8 Twist – Black

5.00 out of 5

Original price was: $389.95.Current price is: $204.95.

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16″ 5.56 NATO Barrel 1×7 Twist | Daytona Tactical

5.00 out of 5

Original price was: $129.95.Current price is: $74.95.

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10.5 inch Stainless Steel 5.56 Nato Barrel

4.78 out of 5

Original price was: $119.00.Current price is: $94.99.

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16″ 5.56 AR-15 Complete Upper – 15″ Keymod, 1:7 Twist, FDE – BCG & CH Included

4.83 out of 5

Original price was: $359.99.Current price is: $306.95.

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16″ 5.56 NATO Barrel 1×8 Twist | Daytona Tactical

5.00 out of 5

Original price was: $129.95.Current price is: $74.95.

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7.5″ AR Upper 7 inch M-LOK Rail No BCG or Charging Handle

4.83 out of 5

Original price was: $389.95.Current price is: $195.95.

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16″ A2 Sight Tower M4 1×7 Carbine Upper No BCG or Charging Handle

5.00 out of 5

Original price was: $329.95.Current price is: $265.95.

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16″ Magpul Rifle Kit 15″ Keymod Assembled WITH 80% Lower

5.00 out of 5

Original price was: $579.95.Current price is: $459.95.

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5.56 Nato 10.5″ Barrel

5.00 out of 5

Original price was: $124.00.Current price is: $59.95.

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16″ 1×7 Carbine 15 inch M-LOK Rail No BCG or Charging Handle

4.67 out of 5

Original price was: $389.95.Current price is: $194.95.

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AR-15 Magpul Rifle Kit 15″ M-lok Upper Assembled WITH 80% Lower

5.00 out of 5

Original price was: $579.95.Current price is: $459.95.

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16″ 1×7 Carbine 12 inch M-LOK Rail No BCG or Charging Handle

0 out of 5

Original price was: $389.95.Current price is: $194.95.

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16″ 5.56 AR-15 Magpul Moe M-Lok Carbine Upper No BCG or Charging handle

5.00 out of 5

Original price was: $319.95.Current price is: $209.95.

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16″ 1×7 Carbine 15 inch Keymod Rail No BCG or Charging Handle

5.00 out of 5

Original price was: $389.95.Current price is: $204.95.

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10.5″ AR Upper 10 inch M-LOK Rail No BCG or Charging Handle

5.00 out of 5

Original price was: $389.95.Current price is: $199.95.

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16″ 1×8 Carbine 12 inch M-LOK Rail No BCG or Charging Handle

5.00 out of 5

Original price was: $389.95.Current price is: $204.95.

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10.5″ AR-15 Flat Dark Earth Upper 10 inch AR15 Keymod Rail with BCG

4.50 out of 5

Original price was: $329.00.Current price is: $286.99.

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7.5″ 5.56 NATO SS Barrel 1×7 Twist | Daytona

5.00 out of 5

Original price was: $129.95.Current price is: $54.99.

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7.5″ Flat Dark Earth AR-15 Upper 7 inch Keymod Rail No BCG or Charging Handle

4.50 out of 5

Original price was: $359.95.Current price is: $219.95.

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16″ AR-15 Cerakote Upper with 15 inch Keymod Rail No BCG or Charging Handle

5.00 out of 5

Original price was: $316.95.Current price is: $214.95.

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16″ Magpul Rifle Kit 15″ Keymod Assembled NO 80% Lower

0 out of 5

Original price was: $539.95.Current price is: $404.95.

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7.5″ 1×7 Stainless Steel Barrel Pistol Upper 7 inch Keymod Rail No BCG or Charging Handle

0 out of 5

Original price was: $359.95.Current price is: $179.95.

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