Sturm Ruger AR-556 Free-Float Handguard 5.56mm NATO, 16 in, AR-15 Platform, DI, B5 Stock, Daniel Defense Foregrip, Muzzle Brake - Excellent (2021)
This 2021 Ruger AR-556 Free-Float Handguard model is a clean, well-sorted AR-15 chambered in 5.56mm NATO with thoughtful upgrades and strong factory features. It wears Ruger’s free-float aluminum M-LOK handguard, a flat-top Picatinny receiver, and a 16 in barrel with an installed multi-port muzzle brake. Enhancements include a B5 Systems adjustable stock and pistol grip plus a Daniel Defense vertical foregrip, making this rifle a standout, ready-to-run configuration in excellent condition.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: The rifle shows little evidence of prior use. The bore is clean and shiny.
What's Included
- Original box (other)
- Original manual
- 1x 30-round Magpul PMAG polymer magazine
- 1 x 30 rounds of ammunition
- Daniel Defense vertical foregrip (installed)
- Aftermarket multi-port muzzle brake (installed)
- B5 Systems adjustable carbine stock (installed)
- B5 Systems pistol grip (installed)
The AR-556 Free-Float Handguard series combines Ruger’s flat-top upper with a Ruger-branded free-float aluminum handguard featuring elongated M-LOK slots. A low-profile gas block sits under the handguard, and the 16 in barrel uses a threaded muzzle that currently hosts an installed multi-port brake. There are no iron sights installed, and the receiver’s Picatinny rail provides a straightforward mounting surface for optics or sights.
Receivers are 7075-T6 aluminum with a hard-coat anodized black finish. The bolt is 9310 alloy steel that is shot-peened and proof-tested. A carbine receiver extension is used, and the rifle feeds from detachable STANAG-pattern magazines.
Thoughtful upgrades center on ergonomics and control: a B5 Systems adjustable carbine stock, a B5 Systems pistol grip, and a Daniel Defense vertical foregrip. These components pair well with the free-float M-LOK handguard for accessory placement and recoil management, while the brake helps tame muzzle movement.
Built in the USA at Ruger’s Mayodan, North Carolina facility, this direct-impingement AR-15 is chambered in 5.56mm NATO with a 30+1 capacity. It ships with its original box and manual, a 30-round PMAG, and 30 rounds of ammunition.