MPR Multi Purpose Rifle Users Handbook This handbook refers to all MPR models PLEASE READ THIS MANUAL BEFORE USING YOUR MPR FOR THE FIRST TIME. IT CONTAINS IMPORTANT SAFETY INFORMATION AND INSTRUCTION ON USE, ADJUSTMENT AND MAINTENANCE. Model shown is the MPR Sporter model. **** SAFETY CODE **** 1 2 3 4 5 6. ALWAYS TREAT AN AIR RIFLE AS IF LOADED. ALWAYS POINT THE RIFLE IN A SAFE DIRECTION, NEVER POINT A GUN AT ANYONE, EVEN IF UNLOADED. NEVER LEAVE A RIFLE UNATTENDED WHEN COCKED OR LOADED.
THIS AIRGUN IS INTENDED FOR USE BY THOSE 18 YEARS OF AGE OR OLDER. WARNING! Not a toy. Adult supervision required. Misuse or careless use may cause serious injury or death. May be dangerous up to 1,000 yards. WARNING! Do not inhale dust from lead pellets or put lead pellets in the mouth. Wash hands after handling lead. Lead pellets contain lead, a chemical known to the State of California to cause cancer and birth defects (or other reproductive harm).
Contents of box. 1 1 1 x x x MPR rifle. Set of sights. Tool kit consisting of. 1 x Manual. 1 x 1.5mm Allen key. 1 x 2mm Allen key. 1 x 2.5mm Allen key. 1 x 3mm Allen key. 1 x 4mm Allen key. 1 x 5mm Allen key. 1 x 6mm Allen key. 1 x Filling adaptor. 1 x Cylinder removal spanner. Contents. Important information. Assembly. Sight assembly. Filling instructions. Cocking. Loading. Trigger adjustment. Stock adjustment. Maintenance. Parts list and diagrams. Page 3. Page 5. Page 6. Page 7. Page 9. Page 10.
Important Information continued. Only use clean, filtered and dry compressed air. Never use any other gas, particularly industrial or welding gases such as oxygen, carbon dioxide, acetylene, hydrogen, argon, etc. If compressed air is being used other than from a diving shop, the inside of the cylinder should be inspected for corrosion at least annually. In any event the cylinder should be inspected every two to three years depending upon usage. Air Arms can provide this service at a reasonable cost.
Assembly and Disassembly of the rifle. One of the main features of the S400 Multi Purpose Rifle is the fact that the rear butt stock can be removed from the fore-end to allow a change of handing i.e. right hand to left hand. This is achieved by removing the bolt (turning counter-clockwise) from the bottom of the pistol grip area with the 6mm Allen key supplied with the rifle. Once the screw has been removed the two halves of the stock can be gently pulled apart. Re-assembly is the reverse procedure.
Sight assembly. If you wish to use the sights supplied with your Multi Purpose Rifle they first have to be fitted to the gun. The set of sights supplied comes in 2 pieces, Fig 5, the front sight and rear sight, and both fit onto dovetail mountings on the rifle. Firstly making sure that the thumb screw is loose, slide the rear sight onto the dovetails and into position Fig 6. Once the sight is in position, the thumb screw can be tightened, being careful not to over-tighten the screw Fig 7.
Filling the Cylinder. Removing the cylinder from the rifle. To fill the cylinder it must first be removed from the main body of the rifle. This is achieved by unscrewing the cylinder in a anticlockwise direction. Fig 11. The cylinder should only be hand tight, if this is not the case use the spanner provided to loosen the cylinder, then continue without the spanner Fig 12. Note. When removing the cylinder from the rifle there may be a sound of air escaping, this is normal.
Once the desired pressure is reached close the main valve on the filling bottle or stop pumping. Open the bleed valve on the adaptor, this will vent the trapped air in the hose and allow the cylinder to be unscrewed from the adaptor. If you don’t vent the adaptor, air trapped in the hoses makes removing the cylinder from the filling kit very difficult and may cause damage to the adaptor seals. With the vent screw open unscrew the cylinder from the filling adaptor.
Cocking and Loading the rifle. To cock the S400 Multi Purpose Rifle hold the gun firmly in one hand and with the other hold the bolt as shown in Fig 16. Lift the bolt up and pull straight backwards until you hear a click, this is the sear engaging the striker (In the pictures below, the sights have been removed for demonstration purposes). If the bolt is held with 2 fingers on one side of the bolt and the thumb on the other side, as in Fig 17, the cocking action is smoother and less effort.
Once the rifle is cocked, a pellet can be placed into the loading bolt trough Fig 18. The loading bolt can now be pushed forward to locate the pellet into the barrel. When the bolt is forwards as far as it can go, turn the handle down to lock it into place Fig 19. WARNING. Extra care must now be taken as the rifle is now cocked, loaded and ready to fire. De-cocking.
Trigger adjustment. The Multi Purpose Rifle has a two stage trigger. This means that as the trigger is pulled the bottom sear gradually disengages with the top sear until the two disengage completely and the rifle fires. If the pressure on the trigger is released before firing, the sears return to their first fully engaged position. This type of trigger allows a very fine but safe operation because it is the release of the second stage that actually fires the gun.
Moving the pillar on the trigger bar. Loosening screw ‘A’ with the 1.5mm Allen key (supplied) will allow the trigger pillar to be moved forwards and backwards along the trigger bar. (Fig 22). Trigger adjustment. The operation of the trigger is controlled by 3 screws C, D & E (fig 23). The weight of pull adjustment is controlled by screw ‘E’, and is located in front of the trigger, housed in the trigger guard (fig 20).
Adjusting the Cheek Piece and Butt Pad. The cheek piece can be adjusted in two planes first it can be raised and lowered by loosening screw ‘J’ (fig 25). The cheek piece can also be adjusted a small amount from side to side as in (fig 25), by loosening screws ‘I’.
Adjusting butt pad. The butt pad on the MPR can be adjusting in the vertical plane by loosening screw ‘K’, and sliding the pad into position then re-tightening screw ‘K’. Fig 28. Spacers can be added in between the butt pad assembly and the butt stock to lengthen the stock. This can be achieved by moving the rubber pad up or down to expose screw ‘L’, Fig 29 at the top and bottom of the butt pad assembly. Loosening these screw will allow a spacer (available from Air Arms) to be place into the assembly.
MAINTENANCE FIXINGS Regularly check the tightness of all fixings. However do not be tempted to over tighten as some parts are made from aluminium and stripped threads may result. Stripped threads are not covered by the manufacturers warranty. BARREL For ultimate accuracy, clean and re-lube the barrel frequently. It is difficult to advise how often is best for every circumstance, but every 250 shots is not too often if the desire is to keep the barrel in the best possible condition.
SAFETY You and others with you should always wear shooting glasses to protect your eyes. Always aim your air rifle in a SAFE DIRECTION. When you are sure of your target and backstop and the area around the target is clear, take the air rifle OFF SAFE and squeeze the trigger to fire. Do not shoot at hard surfaces or at the surface of water. The pellet may bounce off or ricochet and hit someone or something you had not intended to hit. Always choose your target carefully.
Technical Information. Weights and measures. Overall weight. Sporter. Precision with rubber pad. 3.15kg. 3.17kg. Overall Length. Sporter. Precision with rubber pad. 925mm (36 3/8”). 1040mm (41”). Barrel length. Barrel length including muzzle. Barrel length including long muzzle. 480mm (18 7/8”). 522mm (20 1/2”). 545mm (21 1/2”). Length of sight line. Sporter. Precision. 645mm (25 3/8”). 760mm (29 7/8”) Length of accessory rails. Internal (optional on sporter). External. 192mm (7 1/2”).
WARRANTY Limited One-Year Warranty This product is warranted to the retail consumer for one year from date of retail purchase against defects in material and workmanship and is transferable. What is covered: Replacement parts and labor. Transportation charges to consumer for repaired product. What is NOT covered: Transportation charges to Air Venturi for defective products. Damages caused by abuse or failure to perform normal maintenance. Any other expense.
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