The daddy of the 400 series was the Model 3, this did not have a anti-beartrap on it. Because it was a pre-woke air-rifle.

Then some idiots chopped their fingers and spoiled the fun.

Its possible someone just de-trapped it, although the rifle can be decocked by holding the safety lever down. It's very important on these rifles to keep the trigger unit bolts nice and tight because if they loosen the sear won't engage far enough and it will go off on its own, either causing an involultary discharge or a dangerous beartrap incident.

Trigger parts for these do come up on the auction site from time to time.