Sinclair - Comparator Nut Borescope NB: There is a different

NB:  There is a different Quick Change Base for a bench Flush Mount system

Installation of the BT07 is friction-fit and requires no tools

Sig Sauer Romeo4

062” and 0

Also available

Sinclair - Comparator Nut Borescope NB: There is a differentSPECS Hex Model #1 has holes bored and throated for 22 Caliber (0. 224), 6mm (0. 243), 25 Caliber (0. 257), 6. 5mm (0. 264), 7mm (0. 284), and 30 Caliber (0. 308) Hex Model #2 has holes bored and throated for 17 Caliber (0. 172), 20 Caliber (0. 204), 22 Caliber (0. 224), 270 Caliber (0. 270), 30 Caliber (0. 308) and 338 Caliber (0. 338) Sinclair has been making these hex style bullet comparators for over 20 years. The holes in the Sinclair Bullet