Iron sights are of fixed type, set for 300 meters range. The long barrel is fitted with effective muzzle brake. Rifle is equipped with traditional wooden stock and folding bipod. Feed is from detachable box magazine which holds 4 rounds. It uses Mauser-type rotary bolt with frontal locking lugs. The Maroszek Kb Ur wz.35 anti-tank rifle is amanually operated, bolt action rifle. Total production of the wz.35 anti-tank rifles is estimated at about 6 500 guns, which were delivered to Polish army before the German occupation. Due to the very high muzzle velocities, the barrel life of the rifle was relatively short (barrels normally had to be replaced every 300 rounds or so). Rifle was built around proprietary, rifle-caliber round (metric designation 7.92x107), which had very long and slender case, and was loaded with conventional, lead-cored jacketed bullet (12.8 gram, 1220 m/s). The peculiar name 'Kb Ur' comes from the attempt of the Polish army to disguise this development as the 'rifle for Uruguay'. Some Maroszek Kb Ur wz.35 anti-tank rifles were captured by German army, where these were known as PzB 35(p). The Maroszek Kb Ur wz.35 anti-tank rifle was developed in Poland in mid-1930s, and kept under strict secrecy, which resulted in limited use of this weapon during the German attack on the Poland in 1939, despite the fact that this weapon was effective enough to deal with German tanks of the period. The high energy was due to the relatively long barrel, and nitro powder giving a muzzle velocity of 1,275 m/s. Calculated kinetic energy, by shot, before brake was about 11,850 J. 35 did not use an armour-piercing bullet with a hard core, but rather a lead core, full metal jacket bullet weighing 14.579 g due to the high muzzle velocity this was effective even under shallow angles, as instead of ricocheting, the bullet would 'stick' to the armour and punch a roughly 20 mm diameter hole.

Unlike other anti-material rifles of the time, the wz. It had fitted iron sights fixed for a 300-meter range. The brake absorbed approximately 65% of the shot energy and the recoil was comparable to the standard Mauser rifle, even though the cartridge carried more than twice the amount of propellant. The barrel was equipped with a muzzle brake to limit the recoil. It was a bolt-action rifle, fed from a 4-round box magazine. In appearance it resembled a rifle with a longer-than-normal barrel supported by a bipod at the front of the wooden stock.

Wz 35 anti tank rifle