The ASDW (Aircrew Self Defense Weapon) is being fielded as of now, as the training for aircrew/pilots/etc. has been developed, tested, and implemented. My training section has been conducting Aircrew Shoot-Move-Communicate for about the last two years in preparation for the fielding of this weapons system. There is a lot that has gone into the development of this program, and while I don't necessarily see the "need" for this weapons system, I am all for giving these guys the training and tools they need to increase their standoff and survivability given a worst case scenario.
The reason for the strange design of the weapon is that it had to be created to fit in the existing space in a fighter jets ejection seat and field kit. This necessitated the break down style of weapon, and the folding pistol grip. The aircrew that has received the training has enjoyed it, and takes the ground combat aspect very seriously, but we let them know from the very beginning that , when possible,their priority should be to escape and evade rather than engage and defend.
The SMC training we conduct is as realistic as we can make it while meeting Big AF's concept of training, and while there are some areas that need to be improved, it is decent in execution. We cover escape and evasions drills (including getting our K9 teams involved), live fire weapons qualification, dry runs, blank fire to perform skills with feedback and malfunctions, and ultimately end with FoF with simmunitions. It's never a bad thing being able to shoot some footie pajama wearers in the face with UTM rounds.