Breechface of a firearm

Breechface of a firearm, Coaxial Illumination at extintion, 20X,
Leics FSC comparison (left stage only), taken by Gerard Petillo, CT DPS Forensic Lab, Meriden, Connecticut, USA

Coaxial Illumination at extintion
20X
Leics FSC comparison (left stage only),
taken by Gerard Petillo, CT DPS Forensic Lab, Meriden, Connecticut, USA