The blaster itself is, like the name implies, firm. Only the
thinnest sections of the casting bend or give. The rest of the gun
feels firm and rigid. For costuming, the hyperfirm replicas can't be beat: they are lightweight, wont ding up your armor, and are durable. None of these characteristics are found in resin replicas.
I can't say enough good things about any of my hyperfirm guns, and the only downside is price. They can be a bit expensive, but are well worth it in the long run. I've never heard of anyone being disappointed in their replica.