FN Herstal FS2000 Standard 5.56 NATO Bullpup Semi-Auto with Factory 1.6x Optic, Belgian-Made, Forward-Ejection
Belgian-made and imported by FNH USA, this FN Herstal FS2000 Standard is the semi-automatic civilian derivative of FN’s F2000, notable for its forward-ejection system that delivers true ambidextrous operation. It features the factory integral 1.6x optic under a protective shroud, a compact bullpup layout with a 17.5 inch cold-hammer-forged barrel, and acceptance of STANAG/M16-pattern magazines. Discontinued from FN’s commercial lineup, it carries strong interest among enthusiasts and collectors.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Minor scratches and small blemishes are present on exterior surfaces consistent with light handling and prior use.
What's Included
- FN Herstal FS2000 Standard semi-automatic bullpup rifle (5.56mm NATO)
- Factory integral 1.6x fixed-power optic under protective shroud
- One 30-round AR-15/M16 pattern aluminum detachable box magazine
The FS2000 Standard retains the hallmark forward-ejection system that routes spent cases to a front-right port, making operation equally practical for right- or left-handed shooters. Its bullpup configuration provides an approximately 29.1 inch overall length while maintaining a full-length 17.5 inch barrel, resulting in a compact profile without sacrificing barrel length.
The cold-hammer-forged steel barrel uses a 1:7 RH twist to stabilize a wide range of 5.56 NATO projectiles. A short-stroke gas piston system drives the action, and a multi-port muzzle device is installed at the muzzle. Controls include a cross-bolt safety. The rifle accepts standard STANAG/M16-pattern magazines and comes with one 30-round aluminum magazine.
Construction centers on a glass-fiber-reinforced polymer housing finished in black, with the FN oval logo molded above the magazine well. Approximate weight is 7.6 lb without a magazine, and length of pull is 14.5 inches, contributing to the rifle’s well-balanced handling within the compact bullpup layout.
This Standard model integrates FN’s factory 1.6x fixed-power optic under a protective shroud, featuring a clear, uncluttered reticle. Matching serial identifiers are present on the upper housing, a small metal tag in the charging-track area, and on an underside barcode label. Markings include FN Herstal Belgium model information and the FNH USA Fredericksburg, VA importer stamp. The FS2000’s discontinued commercial status and distinctive engineering add to its appeal for collectors and FN enthusiasts.

