You can usually tell if they are, The heads tend to be fatter and less defined by the softer foam. But If it does not specifically state it is stab safe or has a collapsible tip then don’t buy it.
The most weaselly worded answer I have heard was “If used properly it will be perfectly safe to use”.
Pop a link up and let us see, also Email the retailer and ask if its stab safe with a collapsible tip of at least Xins (Can a ref/weapon checker please weigh in please, @tea do you know?)
The Sentinel is definitely not stab-safe. The construction is wrong.
The Rune is “probably” not stab safe. There isn’t a good zoomed image of the head so I can’t be definite but I don’t think its Stab safe either. The head doesn’t look like it would collapse.
A quick look at the website, none of their weapons are stab safe. The points/blades are too thin and if you tried it would tear the latex/foam.
Compare them to these: http://www.saxonviolence.com/collection/spears
notice the wider stabbing tip of the halberds.
I would recommend Saxon Violence kit, Its good, sturdy well weighted and has a historical aesthetic I like. Also the owner makes them all him self so it’s easier for small customisation if you were to ask.
Collapsible tip weapons at Empire require a specific combination of reinforcement and squishy padding. This is not very common in mass-produced weaponry.
Makers I can think of who tend to build weapons that pass (this list is not official or exhaustive):
Out of those, I personally find Saxon Violence are one of the best, in terms of quality, usability and durability.
In general, it’s a very risky proposition to buy larp weaponry online. All of the makers I’ve listed regularly trade at Empire. Most of them take custom orders and would be happy to produce whatever you can imagine for only a nominal extra fee.
One thing to be aware of: most UK larp weapon makers are relatively small businesses. Mail order can sometimes be very unreliable, which is another point in favour of buying at events. Out of that list, I would only personally try ordering in advance from Saxon Violence or Skian Mhor.