If you were to have the choice between these two rifles for squirrels and vermin, which would you go with? I like the old style long barrel and target stock of the 513T but I don't know if replacement/spare magazines are available. If the 452 is anything like my BRNO Model 4, it would be my choice. Magazines and aftermarket parts are available. I have never seen either of these rifles in person so I am not sure if there is anything in particular that may present a problem. Any advice would be appreciated. Have a good week.