Heckler & Koch HK91 vs TR-7

1977–2000

2018–present

~250,000 estimated

1,020 mm (40.2 in) with stock extended

28.4 in (723 mm)

508 mm (20.0 in)

17 in (432 mm)

4.3 kg (9.5 lb) empty

4.1 kg (9.0 lb)

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

20-round box magazine

Roller‑delayed blowback, closed bolt

Short-stroke gas piston, rotating bolt

Single‑stage semi‑automatic trigger with manual safety lever

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

Picatinny rail for optics