Or are we talking about pipe built kits?
Doopy's ain't just Doopy's
There's a few kinds, with varying durability
Mine is an aluminium pipe, so it's probably tougher than a PVC one or a solid resin one
Hard to think how it would compare to a Hasbro (the Hasbros are durable for different reasons, there's a lot less resin to break, and they're lighter, so they're less likely to 'damage themselves' as it were, by bumping your leg in the holster and such)
Anyway
Literally hundreds of kids have handled my blaster, none have ever broken bits off
Sure, I wouldn't want to drop it or anything
But it has never struck me as fragile
(also note I used a stupid amount of glue and hidden screws all over the place)
And yeah, Hyperfirms are totally more durable (being almost indestructible)