The Radical Defense MK1 Mod 1 Patrol (brand part no. MK1MOD1PATROL) is a 5.56mm short-barreled rifle built around a 14.5-inch barrel, equipped standard with Radical Defense’s suppressor-ready KFM taper lock flash hider and Battle Arms Development components, favoring patrol and duty-style rifle shooters.

Key Specifications

• Chambered in .223 Rem/5.56 NATO.
• Wears a 14.5-inch barrel.
• Feeds with a 30-round capacity.
• Equipped with a KFM taper lock flash hider.
• Equipped with iron sights.

Frequently Asked Questions

Is this an NFA item? Yes. As a short-barreled rifle, it's a Title II firearm requiring an approved ATF Form 4 and transfer through an NFA-licensed dealer.

What flash hider does it use? Radical Defense’s suppressor-ready KFM taper lock flash hider.

Buy the Radical Defense MK1 Mod 1 Patrol SBR

This is a Title II item regulated under the National Firearms Act. Purchase requires an approved ATF Form 4, no federal transfer tax, and transfer through a licensed NFA (SOT/Class 3) dealer, with an extended federal approval wait before delivery. Order through Radical Defense‘s short barrel rifles lineup and our Lubbock, Texas team will walk you through the transfer process.