"Aim small, miss small."

In the Marines, we did something called 'snapping in' to help with acuraccy and getting into a good shooting position. This is how it is done: Practice getting into the different firing positions such as standing, sitting, kneeling and prone. Stay in each position for at least 15 minutes. Set up targets about 25-50 feet away to simulate different range distance. Basically you just set up the target(s) that you normally shoot at only in miniature. Use three or four sizes to simulate longer target distances. The largest should be no more than the size of a quarter. Then you use basic marksmanship principles to dry fire. This helps you in these ways: First, it helps you get a good solid shooting stance/position. This accounts for many problems with accuracy. Second, it helps you with your aiming by training the eye to get good sight alignment and a good sight picture using the smaller targets. Third, it helps you with the actuall firing procedure. Use the BRASSF technique while dry firing just as you would on the range. Also while snapping in you should practice changing magazines every 5-10 rounds of dry firing as you would on a range. Hope this helps you, I know it always helps me before going to the range.

Quoted:We were trained to dry fire our M16's in the Marines during snap in before qualification. It doesen't mean that it is good for the weapon, but the marines are very fanatical about their weapons so I assume they would not do anything that may be detremental to them. On the other hand, I have seen dry firing devices for M16/AR15's in a catalogue. I personally stick with my training and dry fire with no apparent problems.