Glass arrow heads are effective and deadly if made well. These are the issues that I would consider for a medieval war scenario...

it takes much more skill and time to create good knapped arrow heads than it does to make metal ones.

Metal is more durable than glass so that arrows are more likely to be usable again after they are retrieved

Metal arrowheads are much more effective at punching through armor. Glass arrow heads would do very poorly and the damage, even with the broken glass, would be negligible.

I think that lack of access to metal would be the only plausible reason for armies to use glass heads.

I make wooden self bows for a living and have made arrow heads from glass and obsidian. I'm not an expert on knapping but I know a fair bit from experience and research. Hope that was helpful.

Glass arrow heads are effective and deadly if made well. These are the issues that I would consider for a medieval war scenario...

• It takes much more skill and time to create good knapped arrow heads than it does to make metal ones.

• Metal is more durable than glass so that arrows are more likely to be usable again after they are retrieved

• Metal arrowheads are much more effective at punching through armor. Glass arrow heads would do very poorly and the damage from broken glass would be negligible.

I think that lack of access to metal would be the only plausible reason for armies to use glass heads.

I make wooden self bows for a living and have made arrow heads from glass and obsidian. I'm not an expert on knapping but I know a fair bit from experience and research.

Glass arrow heads are effective and deadly if made well. These are the issues that I would consider for a medieval war scenario...

it takes much more skill and time to create good knapped arrow heads than it does to make metal ones.

Metal is more durable than glass so that arrows are more likely to be usable again after they are retrieved

metal arrow heads are much more effective at punching through armor. Glass arrow heads would do very poorly and the damage from broken glass would be negligible.

I think that lack of access to metal would be the only plausible reason for armies to use glass heads.

I make wooden self bows for a living and have made arrow heads from glass and obsidian. I'm not an expert on knapping but I know a fair bit from experience and research. Hope that was helpful.

Glass arrow heads are effective and deadly if made well. These are the issues that I would consider for a medieval war scenario...

it takes much more skill and time to create good knapped arrow heads than it does to make metal ones.

Metal is more durable than glass so that arrows are more likely to be usable again after they are retrieved

Metal arrowheads are much more effective at punching through armor. Glass arrow heads would do very poorly and the damage, even with the broken glass, would be negligible.

I think that lack of access to metal would be the only plausible reason for armies to use glass heads.

I make wooden self bows for a living and have made arrow heads from glass and obsidian. I'm not an expert on knapping but I know a fair bit from experience and research. Hope that was helpful.