FN 15 Guardian 5.56 NATO 16 in AR-15 Rifle — 15 in M-LOK Handguard, Mid-Length Gas, Threaded Barrel, Excellent
This FN America FN 15 Guardian is a recent AR-15 platform rifle chambered in 5.56mm NATO, set up with a 16 in nitride-treated barrel, a 15 in free-float M-LOK handguard, and a mid-length gas system. This example arrives in excellent condition and includes thoughtful upgrades installed: an ambidextrous extended-latch charging handle in FDE, an M-LOK QD sling socket. It comes with three 30-round FN-branded magazines and a hard case.
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: This rifle is very well maintained.
What’s Included
- Hard case
- Three 30-round FN-branded polymer AR-15 magazines
- Ambidextrous extended-latch charging handle, FDE (installed)
- M-LOK QD sling socket (installed)
The FN 15 Guardian uses a semi-automatic, direct impingement system with a mid-length gas setup and low-profile gas block. It features a slick-side upper without a forward assist, plus a brass deflector and an ejection-port cover. It accepts AR-15 pattern magazines and is configured with no sights.
The 16 in barrel is 4150 CMV steel, button-broached, nitride-treated, and HPT/MPI tested. It is threaded 1/2x28 and fitted with an A2 birdcage flash hider. The twist rate is 1:7 RH.
Its 15 in free-float aluminum M-LOK handguard provides a continuous 12 o'clock Picatinny rail and 24 M-LOK slots at 3, 6, and 9 o'clock for accessory placement. Rail length is 15.0 in.
The forged 7075-T6 aluminum receivers wear a hardcoat anodized finish. The bolt carrier group is 9310 steel, HPT/MPI tested, with a properly staked gas key.
Furniture includes an FN-branded 6-position collapsible carbine stock and an FN-branded textured pistol grip. Overall length is approximately 32.1–35.5 in, with an unloaded weight around 6.6 lb. Made in the USA. MSRP is $999.