Radical Firearms RAD 556 7.5″ RPR Pistol | 5.56 NATO

The Radical Firearms RAD 556 is a compact AR-style pistol built around MIL-SPEC forged upper and lower receivers and a free-float RPR rail. It is chambered for .223 Rem/5.56 NATO and features a 7.5″ 1:7 twist, 4150 chromoly vanadium steel barrel intended for short-barrel carbine handling and accessory mounting. For a complementary optic under $1,000, consider a Vortex Sparc AR or a Holosun 507K, both sized for close-quarters and rapid target acquisition.

Common applications: range training and competition/practical carbine events.

Product Specifications

• The caliber is listed as .223 Rem / 5.56 NATO.
• The action is semi-auto.
• The barrel measures 7.5 inches.
• The barrel uses a 1:7 twist and is described as 4150 chromoly vanadium steel.
• The optic footprint is Picatinny.
• The listed capacity is 30 + 1.
• The package includes 1 magazine.
• Type of sights is listed as none.
• The finish is listed as black / anodized.
• The weight is given as 122 ounces.
• Other features include forged MIL-SPEC upper receiver and forged lower receiver.
• The listing notes a 7″ forward guard shield with top Picatinny rail (7RPR).
• Included components call out a pistol buffer assembly with foam sleeve.
• The product is described as including a vanadium steel barrel with an M4 feed ramp.
• The UPC is 814034025652.

This RAD 556 RPR pistol blends a short, stiff barrel profile with a full-length top rail and forged receivers for a compact, accessory-friendly platform. The free-float RPR rail keeps attachments low and offers positive mounting for optics and backup sights. Its 30-round magazine capacity and included magazine make it ready for extended range sessions and competition stages where compact handling and rapid follow-up shots matter.

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