They are both the same size. .177
A .177 caliber air rifle has very little recoil.
Typically BBs are .177 caliber. BB stains for ball bearing, which can be ANY size, those popular for shooting are 177.
Most BB are .177 caliber but there are a few that are .175 caliber.
Yes it can
As long as the pellet is .177 Cal then any .177 caliber pellet will work in your .177 Gamo.
You need to consult your owner's manual. Some BB guns can shoot pellets, but some cannot.
Any air gun or rifle that uses a .177 Caliber pellet can use the Gamo .177 Red Fire Pellet. No matter who makes the air gun. The Caliber .177 is universal to all .177 caliber pellet guns or rifles.
Which model?
Not usually. The bore diameter of a .177 cal. is smaller. If the rod did fit the bore, the brush or jag wouldn't.
4.5 mm and .177 Cal are the same size. It's just two different units of measurement. Millimeters verses Caliber.
No