There are over 100 different model .177 BB guns. It would help if you stated the model you are asking about.
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.
Cal .177
.177 is the more common calibre, so if availability is an issue, that may be something to take into consideration.
You need to consult your owner's manual. Some BB guns can shoot pellets, but some cannot.
.177 BB Cal
Want ads, gun shows, gun shops.
The 620 is a 4.5mm or .177 caliber pellet rifle and is rated around 450 FPS.
Which Model? anywhere from $40 to $120
This model was made by Daisy. Its a model 1894 and shoots standard .177 caliber BBs'
Gun shop or gun show. But first you will need to determine the exact model of your handgun and caliber. By the way, correct name is a magazine, not a clip.
Gun shop.
No. Bad Idea! BB's a .177 in size not .22