C
- cal
- caliber
- cam lock
- cam locking
- cannelure
- cannon
- cant
- canting
- carbine
- cartridge
- cartridge cook-off
- cartridge, auxiliary
- case capacity
- casting, chamber
- center of impact
- center pin
- Cerakote
- CFR
- chamber casting
- chamber leade
- chamber, auxiliary
- Charles Henry Ballard
- checkering
- cherry
- choke, screw in
- choke tubes, Invector (standard)
- Citori (Browning O/U shotgun)
- CL
- Clark Gable
- cock
- cocking
- Code of Federal Regulations
- coefficient of form
- Colt Woodsman (pistol)
- commercial bronze
- compensator, Cutts
- Connecticut Shotgun Manufacturing Company
- cook-off
- crane
- crane cut
- crimp, roll
- Crittendon, L. Ray
- CSMC
- cup, high
- cup, low
- cup, split
- Cutts compensator
- cycle of fire
- cycle of function
- cycle of operation
- cyclic rate
- cylinder
- cylinder end-play
- cylinder endshake
- cylinder gap
- cylinder pin
- cylinder stop
- ČZ 70 (pistol)
- ČZ 75 (pistol)
- ČZ 75 B (pistol)