I bought a CMMG Quebec-A because it is the same as the military M4. It actually has a 14.5" exposed barrel (1.6" recessed inside the upper to bypass the NFA stamp). I love my .22 trainers. To me they are the most fun for me to plink with. Good luck with your search, let me know what you find...
" The strongest reason for the people to retain the right to
keep and bear arms is, as a last resort, to protect
themselves against tyranny in Government...." - Thomas Jefferson