I ain't no gunsmith either don.. it took me a few times and I struggled with it until I finally figured it out.. I just tore down my magten again tonite after a goose hunt on sunday... even though I never pulled the trigger.. (got skunked as usual)...my hunting partner shot one goose.. so it was not a total skunk.. anyway, it is pretty basic.. take off the the forearm nut.. then you can slide off the forearm.. you will see a round nut with approx four holes/indents in the nut.. (this I am assuming takes some kind of special factory spanner wrench).. I take it off with a pair of channel locks or wide mouth pliers..there is also a collet washer with it. this holds the barrel on. remove washer and nut.. open action on gun manually.. then remove barrel, ( it might need some persuasion..so pull hard!..especially if you got a dirty gas piston.. once the barrel is off then you can take off the gas piston assembly. it has two parts put don't take it apart unless it is really dirty.. this is a critical step to remember when reinstalling the barrel/gas piston assembly it is important to line up pin on the barrel collar with the hole on the correct hole on the piston assembly..there is two holes, one for the gas to run the action. and the other to hold the barrel on .. if not assembled right your gun will not work..
back to dis-assembly.. taking off the gas piston, you can now take off the magazine tube collar.. it just slides off .. it has two actuator pins on it.. set this aside, for cleaning. it is a one piece unit..push in your action release button, holding bolt handle and slide your bolt assembly back to forward position.... now take off trigger assembly, by using a correct size pin punch, (or small screwdriver).. pop out the two pins holding trigger assembly in receiver, drop out trigger assembly.. now you have a field stripped magten.. now you have access to the bolt spring and magazine spring assemblies.. magazine spring is self explanatory as it comes out with a correct size allen wrench.. release the allen screw holding the magazine spring follower and you will have access to the spring.. now comes the learning curve part.. to gain access to the bolt spring you must pull the bolt handle out of the bolt.. to do this, raise the silver (bolt collar) above the bolt carrier, and pull out the bolt handle. there is a tab on the bolt handle, and it must clear the bolt collar to come out... pull hard if it is stuck, due to dirt buildup, but should come out quite easily.. now you can get to the bolt spring, by pushing the bolt carrier assembly all the way to the back of the receiver..until it clears the carrier slide channels in the receiver.. ( YOU MUST APPLY CONSTANT PRESSURE!) Do NOT let this part slide forward as it will take the hide off your fingers!!... once you have it all the way back, applying constant pressure pull out the bolt carrier thru the trigger assembly opening.. there will be a long rod attached to the bolt carrier... let it slide out carefully, and slowly.. then you will access the bolt spring on the end of the 3 piece bolt spring assembly.. you did it!... now clean everything well and put back together in reverse order... you did keep track of everything didn't you?... if you have a digital camera, take pics of dis-assembly so you have a detailed record of where everything goes... good luck . and if you run into any snags let me know