16 inch 5.56 NATO barrel is cataloged for 5.56 NATO / .223. Exact chamber, headspace, and manufacturer specifications remain controlling.
FIREARM COMPATIBILITY ENGINE
Evaluate the platform, model, generation, caliber, barrel, optic footprint, muzzle interface, suppressor path, magazine, accessories, manufacturer limits, and legal considerations as one connected configuration.
Build the compatibility path.
Select the actual platform path and connected interfaces. The engine separates cataloged matches, conflicts, and exact-model questions that still require manufacturer documentation or qualified inspection.

AR-15 Pattern Rifle
Small-frame AR, common pattern · Current production
5.56 NATO / .223 · 16 inch 5.56 NATO barrel
Confirmed compatibility
5The selected barrel path and stated muzzle interface both use 1/2x28. Confirm the actual barrel marking and dimensions.
Picatinny rail mounted optic. Confirm rail condition, slot engagement, mount height, eye relief, and manufacturer torque values.
No suppressor or suppressor mount is included in the selected configuration.
5.56 STANAG pattern, 30 round is cataloged for 5.56 NATO / .223. Confirm receiver fit, feed-lip condition, ammunition presentation, and capacity law.
Requires exact verification
1Small-frame AR, common pattern, Current production. Receiver, barrel extension, bolt, gas, and buffer specifications still require exact confirmation.
- Receiver, barrel extension, bolt, gas, and buffer specifications still require exact confirmation.
- Confirm chamber, extension, gas length, twist, pressure standard, and manufacturer ammunition limits.
- Confirm rail condition, slot engagement, mount height, eye relief, and manufacturer torque values.
- No suppressor is included in this configuration.
- Barrel length must be evaluated with the complete firearm and current jurisdiction law.
- No suppressor is selected, but other configuration restrictions may still apply.
- The selected 30-round magazine may be restricted by state or local law.
A cataloged path does not establish that specific parts are safe, lawful, or compatible. Confirm exact product identifiers, dimensions, manufacturer specifications, installation requirements, ammunition, complete configuration, and current law. Use a qualified armorer or gunsmith when inspection, fitting, installation, or function testing is required.