Impala Carbine Impala is a sports rifle in caliber . 22 LR produced by Companhia Brasileira de Cartridges ( CBC ) . Were manufactured between the years 1983 the 1993 Specifically for Shooting in two models : the 322 and the 422 . Has butt in hardwood treated , with parts of grip and carved with adjustable size , and bolt action by system . The Model 422 has a capacity of ten shots in charger free , while the model 322 has capacity for six shots in magazine fitted . Having produced a total of 4 , 000 guns of this model , its main features were its advanced design and the fact that it was developed specifically for use in competitive target shooting . Description . The CBC , Companhia Brasileira de cartridges , this is a company in the Brazilian scene for nearly 70 years . She is originally from the former FNCM , Factory National Cartridges and Ammunition , founded by Italian immigrants Nicola Costabile and Matarazzo . The F . N . C . M . was a historically important undertaking for the State of São Paulo , because at the time of the Constitutional Revolution was the supplier of the cartridges used by the Revolutionary Armed Forces of the State . On that occasion , came out of this factory about 30 , 000 7X57mm Mauser caliber cartridges per day . In 1936 the company had transferred its controlling interest for Remington Arms , a traditional North American arms and ammunition . In 1953 , the CBC begins in Brazil to manufacture the circular fire cartridges . 22 caliber versions Short - and Long Rifle ( LR ) . Its output rose to 2 . 5 million cartridges per year . The . 22 caliber because of its low complexity and low cost manufacturing , is the most widely used gauge in the areas of sport shooting and small fighters . Being equipped with the ignition system of circles , known worldwide as " rim - fire " , does not use external fuse and thus the construction of the cartridge is much easier and less expensive . Thus , it is also the cartridge firearms more accessible , economically . With the popularization of the use of this caliber in shooting sports and fun ( plinking ) and in the wake of other national companies that have launched small arms for this purpose , enter the CBC in the 60s , the market for manufacture of weapons with models that have success , such as semi - automatic rifles model 66 Nylon , actually comes from a model of Remington , and the rifles of line 122 , by repeating bolt action . But a gap still existed in the market ; the rifles manufactured by Rossi , a company located in Rio Grande do Sul and CBC in São Paulo , did not fit very well the requirements of the sniper shooting sports more seriously in the 22 - gauge , which until then had to import these weapons manufacturers offering more refined models . Thinking in this niche market , precisely in the range of snipers practitioners of evidence of . 22 rifles with targets positioned 25 meters , the CBC decides in 1983 to launch a new line of sport rifles , which he named Impala . These weapons had actually derived a bolt action rifle model 122 , with slight modifications , but with a completely new trigger system and more elaborate . Two models were presented : Model Match - Master 322 and Master 422 . The difference being most prominent among them was the design of the pipe and the charger . The 322 was offered with a pipe and heavier style " bull - barrel , the barrel weighed only 1 . 760 kg and six cartridges charger built into the butt . The 422 had the barrel lighter , weighing 1 . 280 kg , thinner , and his ability to boot with 10 shots could be removed through an opening in the bottom of the butt , in the style of the models 122 . However , the 422 can be loaded with the magazine removed from the weapon , the 322 , the load of cartridges can only be done with the breech open , entered one by one in the charger that is not removable . The magazine accepts . 22 caliber ammunition in three sizes , Short , Long and Long - Rifle . For the price range in which stood two models , well above the average of other rifles on the market at the time , and by the small difference in value between the two versions , one would assume that the model 422 would not be so well accepted as its more expensive version . This detail is perceived today , when one observes the presence of 322 practically unanimous in the stands of fire . The butt - style Monte - Carlo , is surprisingly well finished and balanced for a national gun . Besides being equipped with a damper ( recoil pad ) rubber on the threshold of the ventilated type , the grip of the pistol is crafted with a slip resistant finish , grainy , black in color , giving the weapon a very flashy and sophisticated look . The latest versions of this weapon were provided with metal sills featuring height adjustment . The brush guard , despite being made of plastic , has a splined exterior trim , slip , and profile of the butt attached to the bottom . Thus , in addition to further decrease the fulcrum into the hands of the shooter , the weapon gives a stately appearance and robust . The shaft , the barrel bottom , there is an aluminum rail , very well machined , fixed with screws , which allows the installation of a support sling with a " knob " aluminum zigrinado , supplied as standard . Thus , the strap could be adjusted in length very easily . This trail also serves to accommodate other accessories such as " mushroom " , counter - weights , etc . . Removing the barrel and breech assembly and secured by two screws , it appears that there are holes in the butt especially made for the placement of weights . The same applies on the back , accessible by removing the sill . One can thus better balance the weapon according to the preference of the gunman . From experience , the author added some 300gr . lead to the rear of the housing stock , getting to that weight , the balance in the breech region . The weapon uses a system called barrel floating , i . e . it is fixed so only the butt of the gun and the butt does not touch at any point , so the normal vibration of the barrel when the trigger is not transferred to the butt as well as the barrel does not suffer from possible and minimum deformations , derived from wood . The elements of marksmanship were a weak point the gun and CBC tried , over time , minimize this problem by launching handles targeting more sophisticated in later models . In every case , the mass sighting tunnel type is mounted on two channels machined in the barrel and can be easily removed . The Tunnel has a threaded ring that allows the removal and exchange of the type of lattice or mass desired . The backside , however , was lacking , and very , during the first manufactured weapons . Actually it was the same used in backside air gun 245 and 345 of the CBC , very simple , but with lateral and vertical correction . Lacked , however , for not being the type and clicked yes , with ongoing adjustments , which hampered the accuracy with precision . Fortunately , the CBC launched in parallel , and the first sale as an accessory , a backside far higher , with adjustments clicked in both directions , which finally gave a weapon aiming device more accurate and in accordance with its intended purpose . The breech has in its rear , on the opening of ejection slots machined size standard for the alternative mounting of telescopic sights or other systems in marksmanship . For this , the CBC also had an optional system of " peep - sight " interesting and easily adapted . Due to the greater height of the system , it was necessary to install an extender made of aluminum , provided in order to raise the mass sighting . Overall this unit was well constructed . Adjustments clicked with millimetric adjustment range ( not too accurate ) , and supply of two albums ( diopters ) , with an aperture 1 . 0 mm in diameter and another 1 . 4 mm . In addition , accompanying a larger disk of rubber to be applied to diopters , serving as protection and support more comfortable to the eye . Unfortunately this system diopter becomes somewhat useless , because the evidence of official competition for 22 rifles , for targets at 25m , require open sights and do not allow their use and , of course , is far from serious shooters the intention of the Impala can be used in tests of 50m , where she would have to compete with imported rifles category incompatible . The bolt , as said before , was basically the same as the 122 rifles . The design and management is a bit far from being considered perfect . Many moving parts , a certain fragility in the construction of a lever handle and disassembly time consuming and complicated , which makes use of a steel wire that is made to fix the rear body of the bolt . This body has no rotational motion ( as in the actions of Mauser rifles ) , which performs the locking of the breech is an existing shoulder , and the actual lever itself . The precursor is exposed from the bottom , allowing easy entry of dirt . The system allows the weapon to be triggered only with the movement to raise and lower the lever , which is quite practical . As safety signs , once cocked the weapon , a pin provided with a red ring is exposed at the back , easily visible to the shooter . A manual lock gets to the right , in place convenient , but it operates directly in the bolt , and yes , the system trigger . Not a lock efficient that prevent accidental firing due to receive a greater impact on the weapon . The handling of the bolt is not bad , but is a bit harsh when compared to imported models , finer . There is a set of thin steel washers serving as spacers at the junction of the lever with the body of the bolt that , over time , wear out and can begin to rub on the frame of the receiver . The extraction is done through two extractors fixed by a steel spring in the shape of cuff . Even with much use and excessive waste of gunpowder , it is difficult to occur cartridges that can not be extracted . The ejector is well positioned and effectively kicked out and away , the cartridge detonated . The withdrawal of the bolt is by means of a retaining - shaped button , located opposite the bolt lever that rotated in either direction , it locks in position , displaying a color ring for viewing . Besides this holds , it is still necessary that the trigger is pressed to let the bolt housing . The trigger system is a revolution , in the case of a rifle for use in non - Olympic events , made in Brazil . Of course , compared to more sophisticated systems found in weapons for use in competition made primarily in Europe leaves much to be desired . However , justice is done : to the purpose for which this weapon is intended , is an apparatus of very good design . For the first time in Brazil has a gun with the possibility of setting multiple , both in pressure , position and size of course the key . Measurements taken indicate the possibility of setting minimum pressure around 250 - 300 grams , reaching a maximum of 1 , 200 grams . Just as a comparison , some rifles for use in Olympic competition level may have minimal adjustments in the house 20 - 30 grams . However , in rifles for the purpose it was intended to Impala , the pressure of the trigger is light enough . The key trigger can be adjusted via a screw in order to tilt it to either side , or slip it in the longitudinal direction , regulating the distance from the shooter ' s finger length . By two holes at the bottom of the guard can , using a screwdriver , supplied as an accessory , to regulate the spring pressure of the trigger and trigger sensitivity . The last screw is , however , a very uncomfortable position for access . The adjustment of the sensitivity of the trigger can be as follows : set up a cartridge detonated in the chamber and closes the bolt . Then it introduces a screwdriver through the hole and turn the screw clockwise until the firing of the gun . Then he turns the screw 1 / 4 to 1 / 2 turn in a counterclockwise direction and tries to pressure in this position . Never leave this setting too sensitive at risk of getting shot accidental . One of the most packaging used by CBC for these rifles was a Styrofoam box with internal fittings and accessories for the gun , shaped into two parts . Involving these halves , one layer of nylon with zipper and carry handle . The accessories that accompanied the gun , serial , was the support sling , two spacers , two screwdrivers to disassemble and fittings , seals promotional Impala and CBC , a flannel and personalized manual with instructions and exploded view .