FN SCAR 17 vs Heckler & Koch HK91

2009–present

1977–2000

Unknown

~250,000 estimated

963 mm

1,020 mm (40.2 in) with stock extended

406 mm

508 mm (20.0 in)

3.9 kg

4.3 kg (9.5 lb) empty

20 rounds

20 rounds standard, 10‑round low‑profile magazines available for restricted markets

short-stroke gas piston

Roller‑delayed blowback, closed bolt

single-stage

Single‑stage semi‑automatic trigger with manual safety lever

Flip-up sights, optics-ready

Adjustable rotary drum rear sight (100‑800 m) and hooded front post; optional telescopic sight mounting rail on receiver cover