Thanks to all for the info and insight on this one.
Please know that in this circumstance, I would NOT necessarily use this piece of kit to only break glass with...
I totally get that the "Almighty M4/M1014" can more than take care of most matters, as I've been quite a few "gov't funded international trips" where I've had to put it to actual use. Just looking at options besides a bayonet mount on a HD shotgun...??
M4 Bayonet.jfif