FN America Barrel, 14.7", 556NATO, 1:7 Twist, Hammer Forged, Carbine Gas System, M4 Contour, Fits AR-15, Matte Finish, Black 20-100405 20100405

FN America Barrel, 14.7", 5.56 NATO, 1:7 Twist, Hammer Forged – Carbine Gas, M4 Contour – Matte Black SKU: 20-100405 • MPN: 20100405 • UPC: 845737011147 Shooting Surplus Upgrade your AR-15 with genuine FN quality. The FN America 14.7" Hammer Forged 5.56 NATO Barrel is built for shooters who want battle-proven durability, excellent accuracy, and a compact carbine-length configuration. Featuring a cold hammer forged, chrome-lined bore, M4 contour, and carbine-length gas system, this barrel is designed to handle high round counts, rough conditions, and demanding training cycles without compromising reliability. Shooting Surplus+2Palmetto State Armory+2 Built by FN – Battle-Proven Barrel Technology FN is known worldwide for building machine gun and service rifle barrels that withstand extreme use. This AR-15 barrel benefits from that same pedigree: Cold Hammer Forged (CHF) construction – FN uses a proprietary Chrome Moly Vanadium steel and hammer forging process, the same technology applied to their military machine gun barrels, for exceptional strength and barrel life. Palmetto State Armory+1 Magnetic Particle (MP) tested – Each barrel is individually inspected to ensure it is free from hidden flaws or micro-stresses, delivering consistent performance from barrel to barrel. Palmetto State Armory+1 Chrome-lined bore and chamber – A thick chrome lining increases corrosion resistance and helps maintain accuracy under sustained firing, even when the barrel gets hot. Lafayette Shooters+2RifleGear+2 This combination of materials, forging, and inspection means you’re getting a true duty-grade barrel designed to go the distance. Optimized 14.7" Carbine Configuration The FN America 20-100405 barrel is purpose-built for compact, carbine-style AR-15 builds: Shooting Surplus+1 Length: 14.7 inches Caliber: 5.56x45mm NATO (also compatible with .223 Remington) Gas System: Carbine-length – a proven, time-tested gas system for reliability and parts compatibility. Contour: M4 profile – shoulder cuts forward of the gas block to match classic M4-style builds and components. A 14.7" barrel strikes a great balance between maneuverability and ballistic performance, giving you the handling of a compact carbine while still providing solid velocity for duty, defense, or training use. 1:7 Twist for Modern 5.56 Loads The 1:7 twist rate is a true mil-spec standard designed to stabilize heavier bullets often used in modern 5.56 NATO loads. Shooting Surplus+1 Benefits of the 1:7 twist include: Excellent stability with 62–77 grain bullets, including many duty, defensive, and match loads. Versatility to run a wide range of bullet weights commonly found in 5.56 ammunition. Consistent performance at practical carbine distances, whether you’re zeroing at 50/200 or stretching out further. If you’re running heavier OTM, barrier, or match ammo, this twist rate is exactly what you want. Durable, Protective Finish & M4 Features FN finishes this barrel to stand up to field use, weather, and hard training: Matte black manganese phosphate finish – a classic, durable military-style finish that resists corrosion and wear while keeping glare to a minimum. Lafayette Shooters+2Bauer Precision+2 M4 style feed ramps and barrel extension – designed to promote smooth, reliable feeding in AR-15 platforms using standard M4-type upper receivers. Bauer Precision+1 Standard AR-15 compatibility – designed to fit AR-15 pattern rifles using 5.56 NATO components and carbine-length gas systems. Shooting Surplus+1 The result is a barrel that not only performs, but also looks right at home on professional-grade carbines, clones, and hard-use builds. Key Specifications – FN America 20-100405 / 20100405 From multiple FN-authorized dealers and product listings, this barrel’s core specs include: Valhalla Tactical Supply+3Lafayette Shooters+3Shooting Surplus+3 Manufacturer: FN America Model / SKU: 20-100405 MPN: 20100405 UPC: 845737011147 Length: 14.7" Caliber: 5.56x45mm NATO Twist Rate: 1:7 RH Gas System: Carbine-length Contour: M4 profile Material: Chrome Moly Vanadium steel Process: Cold hammer forged Lining: Chrome-lined bore and chamber Finish: Matte black / black phosphate Platform: Fits AR-15 pattern rifles These specifications make it easy to match this barrel to your existing or planned components. Why Choose the FN America 14.7" Hammer Forged Barrel? 1. True Duty-Grade Durability Thanks to its CHF construction, thick chrome lining, and high-grade steel, this barrel is made for high round counts, intense training, and long-term use. It’s built using the same processes FN applies to machine gun barrels designed for sustained fire. Palmetto State Armory+2Top Brass Tactical+2 2. Reliable, Proven 5.56 NATO Performance Chambered for 5.56 NATO, this barrel handles standard-pressure and higher-pressure duty loads reliably while also accepting .223 Remington. Combined with the 1:7 twist, it’s an excellent match for modern defensive and service-style ammunition. Shooting Surplus+1 3. Ideal for Compact Carbine Builds The 14.7" length with carbine gas is a classic configuration for AR-15 carbines. It offers fast handling, good balance, and easy integration with common rail systems, front sight bases, and carbine-length handguards or free-float setups. RifleGear+1 4. FN Branding and Quality Control When you choose an FN barrel, you’re choosing a manufacturer with decades of experience building military-grade weapons and components. The rigorous forging, finishing, and testing processes ensure that what you get is not just another AR barrel—it’s an FN barrel. FN® Firearms+2Palmetto State Armory+2 Ideal Uses for This Barrel The FN America 14.7" 5.56 NATO Hammer Forged Barrel is an outstanding choice for: Duty-style AR-15 builds inspired by proven military and LE carbines Hard-use training rifles where high round counts and reliability matter Home defense or general-purpose carbines that demand durability and consistent accuracy Enthusiast builds where genuine FN components and mil-spec style are important Whether you’re assembling a rugged work rifle, cloning a service carbine, or simply upgrading your current AR with a premium, long-life barrel, this FN barrel is a top-tier foundation. SEO-Focused Summary The FN America Barrel, 14.7", 556NATO, 1:7 Twist, Hammer Forged, Carbine Gas System, M4 Contour, Fits AR-15, Matte Finish, Black (20-100405 / 20100405 / UPC 845737011147) is a cold hammer forged, chrome-lined, M4-profile AR-15 barrel built from Chrome Moly Vanadium steel and finished in durable matte black phosphate. With its carbine-length gas system, 1:7 twist rate, and FN’s battle-proven barrel manufacturing process, this 14.7" 5.56 NATO barrel delivers exceptional durability, reliability, and accuracy for serious AR-15 builders and shooters looking for a true duty-grade component. Valhalla Tactical Supply+3Lafayette Shooters+3Shooting Surplus+3 The End