FN Herstal PS90 5.7x28mm Bullpup, M1913 Top Rail, 16 in CHF Chrome-Lined Barrel, 50+1, Black – Excellent
The FN Herstal PS90 in the M1913 Top Rail configuration offers the iconic bottom-eject 5.7x28mm bullpup with a factory Picatinny rail in place of the integral optic. This example is in excellent condition, Belgian-marked, and features a 16-inch cold hammer-forged, chrome-lined barrel with a 1:9 RH twist and 8-groove rifling. It comes with both a 50-round and a 30-round factory FN top-feed magazine, plus the FN box and manual.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This rifle appears to have been rarely used and shows a few minor scuffs on exterior surfaces.
What’s Included
- FN factory cardboard box
- FN PS90 owner's manual
- 1x 50-round FN PS90 polymer top-feed magazine
- 1x 30-round FN PS90 polymer top-feed magazine
This PS90 is the factory M1913 Top Rail variant, delivering the compact, bottom-eject bullpup layout in a 26.3-inch overall length package that weighs approximately 6.3 lb unloaded. The rail replaces the integral optic found on other configurations, providing the flat-top profile many shooters prefer.
The 16-inch steel barrel is cold hammer-forged and chrome-lined with a 1:9 RH twist and 8-groove rifling, paired with a muzzle brake. This barrel spec is tailored for the 5.7x28mm cartridge and is known for durability and clean maintenance characteristics.
Operation is simple blowback, semi-automatic only. Controls include a rotary safety and a left-side charging handle. The serialized aluminum-alloy upper receiver pairs with a black polymer stock/outer shell that integrates the handguard and provides a 13.5-inch length of pull, keeping the system balanced and easy to handle.
The PS90’s top-mounted horizontal magazine with rotating feed supports the platform’s 50+1 capacity. This rifle includes both a 50-round and a 30-round factory FN magazine. Markings include "Fabrique Nationale Herstal BELGIUM" with "FN COLUMBIA SC," and the country of origin is Belgium.