FN Herstal FS2000 Tactical 5.56 NATO Bullpup, 17.44" Barrel, OD Green, First-Year Production (2006), Gen 1 Trigger Pack
This FN FS2000 Tactical stands out as an early, first-year production example from 2006 with an ultra-low serial in the 0052xx range, placing it among the very first civilian units produced. It features the sought-after Generation 1 trigger pack with the factory safety sear, matching receiver and barrel serials, and the signature forward-ejection system. Belgian-made and import-marked, it is a flat-top Tactical configuration with a MIL-STD-1913 rail and BUIS, combining collectible significance with hallmark FS2000 design.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are minor, superficial scratches and small blemishes present from light handling. The bore is clean and shiny.
What’s Included
- FN Herstal FS2000 Tactical rifle
- 1x 30-round aluminum AR-15/M16-pattern magazine (USGI type)
The Tactical configuration provides a flat-top MIL-STD-1913 rail (approximately 10" rail length) with backup iron sights and a folding front sight. This model omits the integral optic and is set up for mounting accessories on the top rail as needed.
This is an early, first-year production FS2000 with an ultra-low 0052xx serial range, placing it as the 249th civilian unit after numbering began at 005000. It retains the original Generation 1 trigger pack with the factory safety sear, a configuration associated with the earliest imports. The receiver and barrel carry matching serials, underscoring its collector appeal.
Built around a short-stroke gas piston and rotating bolt, the rifle includes a two-position gas regulator (Normal/Adverse) for reliable operation across conditions. FN’s patented forward-ejection system encloses and routes spent cases through a chute toward the front, supporting ambidextrous use without altering the rifle’s handling.
Chambered in 5.56 NATO with a 17.44" steel barrel and a 1:7 RH twist, this FS2000 is designed to run standard AR-15/M16-pattern magazines and includes a cross-bolt safety. The OD Green polymer frame over a steel receiver keeps the package durable and compact, with a 15.0" length of pull characteristic of the bullpup layout. Markings include "FN HERSTAL BELGIUM FS2000 cal. 5.56x45" and "FNH USA FREDERICKSBURG VA."

