[de-lurk]
On all the gunboards I frequent, the XM-8 matter has two sides. One side says how the XM-8 will finally give a cleaner, more reliable weapon due to it's gas system - the M16/M4 vents gas directly into the receiver onto the bolt carrier whereas the XM-8 uses a gas piston and rod to actuate the bolt. The other side says that the XM-8 isn't enough of a leap in technology to replace the M-4. Still the same 5.56x45 mm round as the M-4, unless those that are pushing for the 6.8x43mm round succeed.
H&K also revealed a new gas-piston upper for the M-4 at the SHOT show it seems. The same familiar ergonomics (which the shooters are very particular about) as the M-4, but with a cleaner gas system. Maybe a transitionary piece between the M-4 and XM-8?
Interesting stuff to read more on...
mauser
[re-lurk]