But I digress...
Guns are held together by various means. Traditionally and from the days of the flintlock, screws are used to fasten parts. Modernized machining and gauges allowed for closer fitting parts and interlocking is also used to some extent. The Mauser 96 "Broomhandle" pistol is the best example of a gun with very few screws or pins (sight pin, grip screw and that's all folks). More modernly, we have turned to pins and finally, roll pins. However, one method that still sees popular use is the spring/plunger combination.
The spring/plunger provides the tension to hold two separate parts together that would otherwise separate in the absence of that spring/plunger. Dissassembly entails depressing of the spring/plunger to relieve the tension. It becomes a matter of finding a tool small and sturdy enough to slip between the plunger and the object the plunger is providing tension against.
The great thing about working on guns, pretty soon, the principles of assembly become very much the same and are merely variations of a well practiced technique. The more guns one works one, the easier they become. Then again, there are times when one must walk away, pop a beer and take a breather.
