Gun and rifle barrel inspection borescopes

For gun barrel inspection, a borescope needs to have good lighting and very short focus distance (less than 3mm) due to very limited space. Also the diameter of gun barrel scopes have be small (less than 4.5mm) to fit into 17 caliber rifle. Normally, the insertion tube is either totally rigid or semi-rigid, side-viewing mirror or lens is highly desired to exam barrel walls in details.

We have two types of gun barrel borescopes: traditional optical fiber type, and miniature video camera type. For video camera type, our USB scopes have manual focus feature, and can connect to PC, Android phones and iPhone iPad to preview and take pictures and videos. The most popular models are Vividia GB-460 (4mm diameter, 24" long probe), GB-430 (4mm diameter, 12" long) and GB-8556 (8.5mm diameter, 22" long semi-rigid), GB-5100 (5mm diameter, semi-rigid, 36" long), GB-526 (5mm diameter, rigid, 26" long)

Available diameters of gun barrel borescopes are: 2.8mm, 4mm, 8.5mm. Side mirror usually has slight large diameter. Our gun borescopes are used by gunsmiths, firearm manufacturers, armorers, barrel builders, precision rifle shooters, and gun enthusiasts. The scope is also called rifle borescope, gunsmith borescope, firearm borescope, precision shooting borescope, handgun borescope, pistol borescope and rifle barrel borescope.

Some pictures taken by GB-430 and GB-460 of Brownells AR-15 Barrel: Gas port hole front and side-view modes

Comparison Table of several gun borescope models with Lyman Borecam

Models	Vividia GB-460	Vivida GB-430	Vividia GB-5100	Vividia GB-8556	Vividia GB-526
Insertion tube	rigid straight	rigid straight	semi-rigid	Semi-rigid	rigid straight
Probe diameter	4mm (0.157")	4mm (0.157")	5mm (0.197")	8.5mm (0.335")	4.9mm (0.193")
Probe length	24" (61cm)	12" (30cm)	40" (100cm)	22" (56cm)	26" (67cm)
View directions	forward and side 0 and 90	forward and side 0 and 90	forward and side 0 and 90	forward and side 0 and 90	forward and side view
Focusable?	Manual focus	Manual focus	Fixed focus	Manual focus	Fixed focus range
Resolution	1280x720	1280x720	1280x720	640x480	1280x720
Connection	USB to PC, Mac, Android	USB to PC, Mac, Android	USB to PC, Mac, Android	USB to PC, Mac, Android	USB
Monitor included	No, optional monitor	No, monitor optional	No, monitor optional	No, optional 4.5" monitor	No, 4.5" LCD optional
Caliber to fit	.17 Caliber	.17 Caliber	.20 Caliber	.35 Caliber	.20 Caliber
For iPhone/iPad?	yes. need wifi box and app	yes. need wifi box and app	yes. need wifi box and app	yes. need wifi box and app	yes. need a wifi box
For PCs Android?	yes	yes	yes	yes	yes