.223 Rem | 5.56 NATO

Heckler & Koch (HK USA)

HK MR556 A4 Semi-Auto Rifle with 11-Inch Barrel in Patriot Brown and Black Synthetic Finish

Heckler & Koch (HK USA)

HK 81001202 MR556 A4 5.56x45mm Rifle with 11-Inch Threaded Barrel and M-LOK Handguard

Heckler & Koch (HK USA)

HK MR556 A4 Semi-Auto Rifle with 16.5-inch Threaded Barrel and Ambidextrous Features

Heckler & Koch (HK USA)

HK MR556 A4 Semi-Auto Rifle with 16.5-inch Threaded Barrel, 5.56x45mm, Patriot Brown Picatinny Rail, M-LOK Handguard, and Ambidextrous Safety

FN

FN 36318 Military Collector M4 Rifle in 5.56x45mm NATO with 16-Inch Barrel and Collapsible Stock

FN

FN 36320 M16 Military Collector 5.56x45mm NATO Semi-Auto Rifle with 20-Inch Barrel and Black Finish

Bersa

Bersa BAR15RMFT AR-15 Rifle with 16-inch Barrel, 30+1 Capacity, Optics Ready

Bersa

Bersa BAR15RMGP AR-15 Rifle with 16-Inch Barrel, Magpul Stock, and Optics Ready Features

Ruger

Ruger AR-556 MPR 5.56x45mm NATO Rifle with 18-Inch Barrel and Magpul SL Stock

Daniel Defense

Daniel Defense DDM4 V7 5.56 NATO Rifle with 16-inch Threaded Barrel and Ambidextrous Safety

Daniel Defense

Daniel Defense DDM4 V7 California Compliant 5.56 NATO Rifle with 16-Inch Barrel and SoftTouch Stock

Aero Precision

Aero Precision APCR640435 AR-15 5.56 NATO 16-Inch Mid-Length Barrel with Magpul Furniture and Drop-In Handguard