U.S. SPORTING GOODS, INC. MODEL MP 310 AND MP 320 OVER AND UNDER SHOTGUN (12, 16, 20, 28 GA and .410 Bore) WARNINGS AND INSTRUCTION MANUAL U.S. Sporting Goods, Inc. 411 Hawk Street Rockledge, Florida 32955 (321) 639-4842 www.ussginc.com E-mail: ussg@eaacorp.
U.S. SPORTING GOODS, INC. MODEL: MP 310 and MP 320 OVER & UNDER SHOTGUNS WARNINGS AND INSTRUCTION MANUAL PLEASE READ THESE INSTRUCTIONS MODEL NUMBER MP 310 and MP 320 BARREL LENGTH 26", 28", 30",32" TYPE OVER/UNDER SHOTGUN GAUGES 12, 20, 16, 28, 410 FINISH BLUE GENERAL INFORMATION: Weight (average) - 28" = 7.7 Lbs.
WARNING **YOU RISK PERSONAL INJURY OR DEATH BY HANDLING THIS FIREARM** Before handling any firearm, make sure you know the safety procedures and most importantly, keep the firearm pointed in a safe direction. Before handling this firearm, read, understand and follow the instructions in this manual. Always keep this manual with the firearm. If you lend, give or sell this firearm, be sure the manual goes with it.
Type Of Ammunition To Be Used: It is suggested that high quality commercially manufactured ammunition be used in this firearm. Avoid military surplus or old ammunition as it may not fire with sufficient force to expel the projectile or wad from the barrel. The use of reloaded, high pressure or hand-loaded ammunition can be dangerous and will void the warranty.
FOLLOWING THESE SAFETY RULES CAN SAVE YOUR LIFE OR THE LIFE OF SOMEONE ELSE Get competent firearms instruction in safe handling before using this firearm. Please ask your dealer for names of qualified instructors. All guns are extremely dangerous if carelessly handled or used. Remember that the firearm user is the primary “safety” and that reliance on any mechanical device should never replace safe handling procedures.
FOLLOWING THESE SAFETY RULES CAN SAVE YOUR LIFE OR THE LIFE OF SOMEONE ELSE Never leave a gun unattended or where it could fall. Store guns and ammunition separately beyond the reach of children. Make sure that they are properly secured so untrained individuals and children will be denied access to your guns and ammunition. Test your gun’s operation and safeties only at a shooting range while the firearm is pointed in a safe direction. Know your target and what is beyond.
FOLLOWING THESE SAFETY RULES CAN SAVE YOUR LIFE OR THE LIFE OF SOMEONE ELSE Spectators should be at least 10 feet behind and away from the shooter while the shooter is loading, shooting and unloading. Spectators should wear protection for hearing and sight loss and they should avoid distracting those shooting their firearms. Never drop your gun. If you do drop it, unload it and check it for proper function before using it again. Do NOT alter or modify your gun.
Use the Security Lock Provided with your Shotgun This shotgun comes with a security lock to assist in protecting against unauthorized use. See Picture A. The shotgun must be unloaded when the security lock is in place on the shotgun. WARNING: Using the security lock cannot substitute for securing your firearm and ammunition in separate, locked locations. Picture A The security lock operates as follows: 1.
USED FIREARMS - Firearms are sometimes altered to work incorrectly, or parts may be removed, lost or replaced with incorrect parts. If you got your U.S. Sporting Goods, Inc. firearm as a used gun, BEFORE USING IT you should take it to a good gunsmith who knows Spartan Gunworks firearms, and have him examine it. WRITE U.S. SPORTING GOODS, INC. concerning any items or circumstances which you don’t understand and which might relate to your safety and the operation of your firearm at: U.S. Sporting Goods, Inc.
down the barrel where it can not easily be seen. Check the bore by using a cleaning rod to pass through the barrel. If a blockage is in the bore, DO NOT ATTEMPT TO SHOOT IT OUT WITH ANOTHER CARTRIDGE, OR BLOW IT OUT WITH A BLANK CARTRIDGE OR A CARTRIDGE FROM WHICH THE SHOT HAS BEEN REMOVED. SUCH TECHNIQUE(S) CAN GENERATE EXCESSIVE PRESSURE, DAMAGE THE FIREARM AND CAUSE SERIOUS PERSONAL INJURY.
The safety mechanism is a tang-style safety located behind the top lever. See Picture G.To place the safety in the “on” or “safe” position, pull the button all the way to the rear. When in the “on” or “safe” position, the safety blocks the rearward motion of the trigger(s). To place the safety in the “off” or “fire” position, push the slide all the way to forward. When in the “off” Picture F Picture G or “fire” position, a red dot is exposed behind the slide button.
Over & under shotguns from U.S. Sporting Goods, Inc.are available in either a double-trigger configuration (Model MP 320) or a single trigger configuration (Model MP 310). See Picture D and Picture S. Picture D Picture S Double-trigger Model MP 320 shotguns are patterned after classic over & under shotguns with two triggers. The front trigger always fires the bottom barrel. The back trigger always fires the top barrel.
The set screws for the ejectors are preset at the factory for automatic ejection of fired shells when the action is opened. In the automatic setting, the Picture RV Picture LV slots in the set screws are oriented in a vertical position running perpendicular to the length of the barrels. See vertical positioning of slots as depicted in Picture RV and Picture LV.
The Barrel Selector (for Model MP 310 single-trigger shotguns only) As configured by the factory the Model MP 310 single-trigger shotgun is preset to fire the bottom barrel on the first shot and then the top barrel on the second shot. Once the shotgun is loaded, you may manually set the shotgun to fire the top barrel first. To select the top barrel, with the safety engaged in the “on” position, point the muzzle in a safe direction and push the trigger forward from the rear until you feel and hear a click.
Your shotgun was shipped with the barrel assembly (barrels and fore end) detached from the receiver assembly. To assemble the shotgun, follow these instructions: 1) Remove the plastic bags or wrapping covering the parts. Then remove the fore end from the barrel by pulling outward on the mechanical lever in the lower mid-section of the fore end and tipping the fore end out and away from the barrel. See Figure 1. 2) Now push the top lever of the receiver to the right and hold with one hand.
5) Warning Never fire the gun unless the barrel is locked into position on the receiver and the fore end is locked into the receiver and barrels. 6) Make sure the trigger block safety is engaged after completion of assembly (Red Dot covered) See Figure 5. LOADING AND UNLOADING YOUR SHOTGUN Figure 5 W A R N I N G Never load or fire the shotgun unless the barrels are locked into position on the receiver, and the fore end is locked in to the receiver and barrels.
then close the action by swinging the barrels up until they lock into the receiver and the locking latch should move to its fully locked position (See Figure 9 Figure 10 Figure 11). If the locking lever does not move to the fully locked position (See Figure 12) break open the action again and check to see if the shot shell is fully seated in the chambers. If the shells are fully seated then re-close the action.
FIRING YOUR SHOTGUN WARNING Never load a cartridge into the chamber until you are ready to fire the shotgun. W A R N I N G Do not disengage the trigger block safety until the shotgun is pointed in a safe direction and you are ready to fire.
shotgun will fire when you pull or squeeze the trigger with the requisite force. See Figure 18. 5) If you wish to fire a second shot from the other barrel, you must: a) In the case of a Model MP 310 singletrigger shotgun, release the trigger and then pull or squeeze it again. The second barrel will then fire. Figure 18 b) In the case of a Model MP 320 double-trigger shotgun, move your finger to the other trigger and pull or squeeze that trigger. The second barrel will then fire.
MANUFACTURER’S WARNING: This firearm was manufactured to properly perform with the original parts as designed. It is your duty to make sure any parts you buy are correctly installed and that neither replacements nor originals are altered or changed. Your gun is a complex tool with many parts that must relate correctly to other parts for safe and accurate operation. Putting a gun together wrong or with modified parts can result in a damaged gun, or personal injury or death to you or others.
sary in cleaning if the gun has not been fired or fired very little. If a gun is used frequently, it must be cleaned after each firing and regularly serviced by a professional gunsmith. If the gun has been stored, remove all excess oil and/or grease before firing. Always check to be sure that no cleaning patch or other obstruction remains in the bore or chambers before firing.
age due to use of high velocity, high pressure, reloaded or other nonstandard ammunition, or any unauthorized repair, modification, misuse, abuse, or alteration of the product is not covered by this Limited Warranty. Any implied warranties, including the implied warranties of merchantability and fitness for a particular purpose, are limited to one year from date of original retail purchase. Consequential or incidental damages and/or expenses, or any other expenses are not covered by this warranty.
PARTS LISTFig. 1 – MP310/MP320 Exploded View List of MP 310/MP 320 Components 1. barrel assembly 2. ejector 3. screw 4. front sight 5. swivel ring 6. pin 7. hinge assembly 8. fore grip 9. screw 10. bush 11. catch casing 12. fore grip catch 13. pin 14. spring 15. housing 16. locking lever 17. screw 18. locking lever axle 19. locking strip 20. recoil spring 21. top striker 22. bottom striker 23. striker spring 24. right-hand hammer assembly 25. left-hand hammer assembly 26. pin 27. mainspring pivot 28.
Fig. 2 - MP 310/MP 320 Ejector Parts Figure 2- LIST OF COMPONENTS 1. barrel assembly 2. right-hand ejector 3. left-hand ejector 4. ejector spring 5. plunger 6. hinge assembly 7. fore grip 8. ejector right-hand sear 9. ejector left-hand sear 10. ejector sear bolt 11. spring 12. base 13. right-hand bolt plunger 14. left-hand bolt plunger 15. tripping lever 16. tripping lever catch 17.
Fig. 3 - MP 310/MP 320 Single Trigger Mechanism Parts Figure 3- LIST OF COMPONENTS 1. carrier 2. locking strip 3. right-hand sear 4. left-hand sear 5. inertia-type tripping lever 6. intercepter 7. base plate 8. trigger 9. selector lever 10. selector lever spring 11. selector lever pin 12. trigger bar 13. tripping lever spring 14. trigger bar spring 15. tripping lever pin 16. trigger bar pin 17. trigger spring 18. change lever spring screw 19.
OPTIONAL CHOKE TUBES WARNING. Never install or remove choke tubes while the firearm is loaded. Only install or remove choke tubes with the firearm unloaded, the action open and the trigger block safety engaged.
slightly below the muzzle end of the barrel. Steel shot choke tubes will protrude out from the barrel about 3/4” and the mating lip will be flush with barrel end. E) Before using the shotgun make sure that the choke tubes are installed correctly. F) Keep choke tubes lubricated and installed. Never fire the gun without a choke tube installed. Handle choke tubes carefully since the leading edge is very thin.
! WARNING Children are attracted to and can operate firearms that can cause severe injuries or death. Prevent child access by always keeping guns locked away and unloaded when not in use. If you keep a loaded firearm where a child obtains and improperly uses it, you may be fined or sent to prison. ! ADVERTENCIA A los ninos los atroen las armaside de fuego y los pueden hacer funcionar. Ellos pueden causarses lesiones graves y la muerte.
