Radical Firearms 16″ 5.56 NATO Rifle with 12″ RPR and MFT Furniture – RF01591

Product Description

The Radical Firearms RF01591 is a 16″ semi-automatic rifle chambered in 5.56 NATO, built on the AR platform with a 12″ RPR handguard and MFT furniture. This configuration balances maneuverability with velocity retention for both target shooting and defensive applications.

The AR-15 platform remains the most versatile centerfire rifle system in civilian use. The 5.56 NATO chamber accepts both 5.56 NATO and .223 Remington ammunition, giving shooters flexibility in ammo selection.

Radical Firearms produces AR-pattern rifles at a value-oriented price point without abandoning the direct-impingement operating system and standard parts compatibility that define the platform.

Key Facts

• Model: RF01591
• Caliber: 5.56 NATO
• Action: AR Platform, Semi-Auto
• Barrel Length: 16″
• Handguard: 12″ RPR
• Furniture: MFT

Why the 16-Inch Barrel Matters in 5.56 NATO

A 16″ barrel is the shortest legal length for a rifle without NFA registration. In 5.56 NATO, this length provides a meaningful velocity advantage over shorter carbine barrels while keeping the rifle compact enough for vehicle carry and home defense.

The 5.56 NATO cartridge relies on velocity to fragment reliably. Cutting barrel length below 16 inches costs roughly 25-30 feet per second per inch lost, which affects terminal performance at extended ranges. The 16″ configuration keeps muzzle velocity high enough to stabilize common 55-grain and 62-grain projectiles.

Rifles chambered in 5.56 NATO can safely fire .223 Remington as well, though the reverse is not always true. The 5.56 NATO specification uses higher chamber pressure, so always verify your chamber marking before selecting ammunition.

RPR Handguard and MFT Furniture

The 12″ RPR (Radical Performance Rail) handguard extends most of the length of the barrel, providing more mounting surface for lights, grips, and sling points than carbine-length rails. Longer rails also allow a forward support-hand position that aids recoil control in rapid fire.

MFT (Mission First Tactical) furniture refers to the polymer stock and pistol grip. Aftermarket furniture allows for personal fit adjustments, including length of pull and grip angle, without requiring gunsmithing or special tools. Standard AR-15 components are interchangeable across most manufacturers, so upgrades and replacements are straightforward.

What to Know Before Buying an AR-Platform Rifle

AR-15 pattern rifles are highly modular. Triggers, stocks, grips, handguards, muzzle devices, and sights can all be swapped. If a particular component does not suit your shooting style, replacement parts are widely available.

The semi-auto gas-operated system requires regular cleaning, particularly in the bolt carrier group and gas tube. Carbon fouling builds up faster with suppressor use. A basic cleaning kit, solvent, and lubricant will keep the rifle functioning reliably.

Iron sights or optics are typically mounted separately. The flat-top receiver accepts Picatinny-compatible scope rings, red dots, and magnified optics. Browse our full AR-15 category for complementary accessories and optics.

Buying from Western Sport in Roanoke, TX

Western Sport is a licensed FFL/SOT dealer serving North Texas and the DFW area since 2007. We handle transfers, special orders, and on-site gunsmithing under the direction of owner and gunsmith Lance Rankin. Call 817-393-4000 to confirm specifications, place an order, or arrange a transfer.

Frequently Asked Questions

Q: Is the Radical Firearms RF01591 compatible with standard AR-15 magazines?

A: The RF01591 is built on the standard AR-15 platform and accepts STANAG-pattern magazines designed for 5.56 NATO or .223 Remington. This includes USGI aluminum magazines, polymer PMAGs, and other AR-15 magazines in common capacities.

Q: Can I use .223 Remington ammo in the RF01591?

A: Yes. The 5.56 NATO chamber safely fires both 5.56 NATO and .223 Remington ammunition. The 5.56 chamber has slightly different dimensions to accommodate higher-pressure 5.56 NATO loads, so it handles .223 Remington without issue.

Q: What is the difference between the RPR handguard and a standard carbine rail?

A: The 12″ RPR handguard is longer than a typical carbine-length handguard, which usually measures around 7 inches. The additional length provides more surface area for accessories and allows you to grip farther forward on the rifle for better control.

Q: How does the Radical Firearms rifle compare to other budget AR-15 options?

A: Radical Firearms positions itself in the value segment of the AR-15 market. The RF01591 uses a standard direct-impingement gas system and accepts mil-spec parts, so it shares the same operational characteristics and upgrade path as more expensive AR-platform rifles. Call 817-393-4000 to discuss how this model compares to others in our firearms inventory.

Q: What is the process for buying a rifle at Western Sport in Texas?

A: Texas residents purchasing a rifle must complete ATF Form 4473 and pass a NICS background check at the time of transfer. You will need a valid government-issued photo ID. The process typically takes 20-30 minutes if the background check returns immediately. Out-of-state buyers must have the rifle shipped to a licensed FFL in their home state.

Q: Does Radical Firearms offer a warranty on the RF01591?

A: Warranty terms vary by manufacturer and are subject to change. Call us at 817-393-4000 to confirm current warranty coverage for this model before purchase.

Additional information