Hi I just joined, and so my comments are pretty late; but you did pose a question whether the M16 or TAR21 is better than the other one. True the M16 is a venerable weapon and has been in use since it first came out for use by the GI's in 1971; however the IDF, you know those folks who have been fighting the Arabs, and everyone else in the desert have used the M16/M4 platforms for a long time, have now gone to the TAR21.
But the question I do pose to you is this. What difference does it make if the M16 or TAR21 is better than the other one; especially in an AIRSOFT game? Every one of these rifles is a copy of a real steel one, and have a max range of between 400-800 meters. But with airsoft battles in close proximity of less than 300 yards or less, does it really matter to an airsofter whether the M16 is better? I've used M4/M16/AK74,MP5 all with good success, so my answer is this. If I was going to put down an airsofter for good, I'd use one that will do the job. Oh thank you for listening....