weapon can be loaded and cocked with the safety set at either position. A quadrant sight is provided for aiming, fitted to the right side of the grenade launcher, providing a rotating frame with a post and notch sight, graduated for distances from 50 to 350 m, every 50 m. The launcher weighs unloaded; the muzzle velocity using standard ammunition is approx. . The HK79A1 is a variant specially designed for installation on the HK33 assault rifle. Both the HK69A1 and the HK79 use 40×46mm low-velocity grenade rounds. The Diehl BGT Defence DM101 A2 (IM) HE-Frag grenade is the Bundeswehr's standard-issue ammunition for use with the weapon. It was designed to contain most of its lethal fragmentation within a 5-meter area of effect, a measure meant to reduce "friendly fire" casualties during rapid assaults or close-in perimeter defense. A development of the HK79A1 is the 40 mm underslung SA80 grenade launcher, adapted for use on the British 5.56×45mm NATO L85A1 assault rifle, where it is mounted by replacing the handguard in a similar manner to the early versions of the US-made M203. This was one of the early studies for an under-carried launcher to be mated to the SA80, and never acquired. The necessary step in equipping the SA80 rifles with an underslung grenade launcher was made only in the year 2003 with the adoption of the L17A1/A2 (a variant of the AG36 launcher). The HK69A1 was manufactured under license in Italy by Luigi Franchi S.p.A. as the GL-40/90; it differs from the original German launcher as it features a modified sliding stock assembly and different grips and sights, all made of plastic. It is used by several Italian Law Enforcement agencies for riot control. No military use is made of this weapon in Italy as the Italian Military is equipped with other types of grenade launchers such as the Singaporean CIS 40 GL, again manufactured by Franchi under license, and the American M203 grenade launcher. Users : HK69 variant. : MZP-1 variant is used by EKO Cobra. : HK69A1 is used by the Danish Police for launching tear gas grenades. : HK69A1 37mm L104 riot grenade launcher is used by the Metropolitan Police for Baton rounds. : HK69A1 used by the Finnish Defence Forces as the 40 KRPIST 2002 (Kranaattipistooli 2002). : The German Armed Forces, particularly the German Army, use the HK69A1 as "Granatpistole 40 mm. : MZP-1