This beast is a figment of someones imagination, it is either a Parker Hale manufactured C3 7.62 MM sniping rifle used by the CF or someone who's nomaclature is totally out to lunch, when possibly describing an FN C1A2, 8L series rifle ( they were still called C1A1s even after the changes ). File this one under unicorn.
C1.......Rifle 7.62 MM FNC1A1 semi automatic! and C1A1D Navy auto mod.
C2...... Rile 7.62 MM FN C2A1 full automatic, LMG sec. support weapon
C3.......Rifle 7.62 MM Sniper Parker Hale 1200TX series
C4.......Rifle No. 4 mk 1 303 cal. cadets and rangers
C5.......Browning 7.62MM air cooled belt fed medium machine gun
C6.......FN Mag 7.62MM GPMG air cooled, belt fed, replacement for the C5
C7.......Diemaco Mfg. 5.56 MM M16 A2/A3
C8.......Diemaco Mfg. 5.56 MM M16 A1/A3 carbine
C9.......Diemaco Mfg. 5.56 MM FN Minimi, C10... .Diemaco Mfg. proposed cadet .22 version of C7
C1...... Submachine gun 9 MM ( Sterling )