Abstract: A recoil brake 10 for a gun includes a cylinder 11 and a piston 12 which is slidably mounted in cylinder 11, with braking force being supplied when piston 12 is extracted by the recoil movement of the gun barrel and presses hydraulic fluid through a narrow flow cross section. In order to be able to accommodate the recoil brake in an area protected against enemy fire or shrapnel, even if space is cramped, the structural length of the recoil brake is reduced by including a further piston rod in the form of a hollow cylinder which is disposed within cylinder 11 so as to coaxially surround the first piston rod 12. This second piston rod 13 is extracted only after the first piston rod 12 has reached its maximum extended position.

Abstract: A countercoil and recoil damper for an automatic firearm which ensures floating support of the weapon during automatic bursts of fire is disclosed. To achieve this, the damper provides annular spring packs (32-35) and a precompressed spring (24), colinear with the other annular spring packs. The precompressed spring is a coil spring which is compressed during countercoil and is released during recoil in order to increase the hysteresis of the annular spring packs (32-35).

Abstract: An improved gun barrel in a tank cannon assembly having a recoiling mass is described. This gun barrel has an increased target impact precision by virtue of stabilizing the bending oscillations and/or vibrations during firing, thereby making the jump angle more uniform from one firing to the next one. The L/D ratio of the gun barrel is larger than 52 (where L represents the length of the gun barrel and D represents the caliber diameter). The gun barrel jacket has a frusto-conically shaped portion extending from the muzzle towards the rear of the gun barrel which is adjoined by a cylindrically shaped portion. The gun barrel is supported on a cradle along the latter portion. The gun barrel exhibits a continuous unbuckled bending line in its static and dynamic conditions between its muzzle and the cylindrical jacket portion. The frusto-conically shaped and cylindrically shaped portions merge into each other and have identical diameters along their merging line.