My builder put in about 20 small directional can lights with GU 10 Halogen bulbs. They are now starting to go out.
The trim on these has a diameter of 3 and 3/4 inches. There is an outer ring, and an inner ring that the bulb rests in. The inner ring swivels.
There is no way to get the bulb out without taking the entire assembly down out of the can. I have read that you are supposed to twist and then pull the bulb out, but that does not work with this fixture as the bulb diameter is larger than the inner ring.
So the only way the bulb comes out is when you take the entire assembly out and take the bulb out the top of the assembly. So, why not just take the assembly out, replace the bulb and get on with it? Because once the assembly comes out, it will not go back in the can without slipping right back out. There are several small clips affixed to the inside sides of the can, and that appears to be all that was holding the assembly in place. But once the assembly is removed once, these clips will no longer hold it in place. If you try to bend the clips a bit for more pressure, they break.