Metal- yes. bright no!!! don't waste your money on these. - TruGlo Brite-Site TFX PRO Sight Set for Glock 42/43

These sights are highly over-rated and over-price. If you're looking for daytime sights anything will work. And yes, the fiber optic will glow, but they only do so when the light is straight from overhead. The tritium vials, claimed to be "brighter" than the competition can really only be seen in near pitch black. The orange ring on the front sight looks nice in the photo but you can hardly see it in anything other than bright light unlike some of the competitors front sights where the rings glow in the dark from light charging. In other words, if you're in "in-between" light as in a dim hallway you might as well be using flat black iron sights. If you're lucky to get a sihoutte in the dim light you might be able to use these sights to aim. Otherwise you're pretty much out of luck.

Pehaps the issue is the tritium glows through the fiber optic, and it that's the case the fiber optic probably kills off a lot of the tritium's brightness. Consequently it's a bad design and straight tritium or straight fiber optic would be better.

I didn't realize how bad they were until I compared them with a buddy's Ameriglo sights which were 50% brighter by estimate. I only realized the issues after the Optics Planet return period had expired. I contacted Truglo on March 25, 2021 and it took them until April 30th to respond.

I'm mad at myself because I spent a lot of money for "features" that didn't live up to the hype when i could have had better for half the price. Tritium and fiber optic combo sounds likea panacea. But when neither is up to snuff.