If this is a Jambog then sorry, but I am only referring to this as the beginning of a related discussion. The Air Force has created a break down version of the M4 that fits in the cargo section of an ejection seat. https://www.popularmechanics.com/military/weapons/amp30987343/gau-5a-assault-rifle/ This is better than a pistol., but seems like a missed opportunity by the AF. 5.56x45mm sucks ballistically out of a 12" barrel and if every there was a need for a covert weapon it would be to equip a pilot down behind enemy lines. My first thought is this is a perfect application for 300 BLK. Start with the same exact carbine except with a 300 BLK chambered barrel. Add a supressor to complete the package. This weapon with have more effective terminal ballistics plus it could be used without alerting everone within a mile of you. Ammo incompatibility is irrelevant for this special purpose application in my opinion. Comments anyone? This seems to be an obviously superior solution that would be easy to do for this particular application. Am I missing something?