Radical Firearms FP105556M410RPRBTR BTR 5.56 NATO 10.50″ M-LOK Handguard Black Polymer Black Polymer Grip

The Radical Firearms RF-15 BTR is a semi-auto AR pistol chambered in 5.56 NATO with a 10.50" barrel and M-LOK handguard. Whether you're in Fremont or Sunnyvale, California firearm purchases require understanding local regulations. Review California firearm laws before proceeding with your order.

AR Pistol Setup and Configuration

This Radical Firearms model ships as a complete AR pistol with manual safety and 30-round capacity. The 10.50" barrel balances maneuverability with velocity in the 5.56 NATO round. Black polymer construction keeps weight down. Before taking possession, familiarize yourself with California's registration requirements and the private party transfer process if applicable to your situation. Our FFL team can guide you through each step of the legal transfer. Visit our gun shop in Sunnyvale for our full catalog.

Frequently asked questions

What caliber is the Radical Firearms RF-15 BTR?

This model is chambered in .223 REM/5.56 NATO. Both cartridges are interchangeable in this rifle and offer reliable performance in the AR platform.

Does this AR pistol come with iron sights?

No, this model is not optics-ready and ships without sights. You'll need to source and mount your own iron sights or optics depending on your intended use.

How much does an FFL transfer cost in Sunnyvale?

See our pricing and fees page for current FFL transfer rates — TacticCAL keeps fees flat and transparent. Find gun shop Daly City at TacticCAL.