The Federal Engineering XC900 is a 9x19mm submachine gun/carbine manufactured by Federal Engineering Corporation.
The Federal Engineering XC900 is a 9x19mm blowback operated submachine gun firing from a closed bolt. The weapon uses the fire control group from an M16. Various barrel lengths were avaliable that could make it a rifle, cqb carbine, sniper.
.22LR variant. Fires from 28 round magazine.
9x19mm Parabellum, main variant. Fires from 25/30 round magazines.
.45ACP variant. Fires from 30 round magazine.
- Guns & Ammo, February 1986, Page 57.
- American Rifleman, July 1984, Page 62.