Hi, maybe you can help this way...I sent an E-mail to the company about the availability of training barrels (in the future) for the M&P. I also asked if I could be put on an E-mail notification list for when a new barrel comes out. I got an E-mail back advising that barrels are available for other Glocks (21,17 I think), but they didn't mention whether or not one to fit an M&P or 5900 Series was a possibility or could be considered or whether or not I could be notified of additions to the "line-up." You go tthe inside scoop? THANKS!