638. That hump conceals a hammer. It has the benefits of a hammer - you can cock it - and the benefits of hammerless - it don't snag on your pocket. Best of both worlds.
But, as to whether a novice 5'0" woman handle a 642? This young man is 10, maybe 11. Comes up to about my breastbone. Notice, in the second pic, he is using his bird finger to pull the trigger. He did not have the grip strength to do it with his index finger. BUT - he got it done and shot pretty good.
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Meddle not in the affairs of dragons, for thou art crunchy, and taste good with catsup - George of Lod, Year of Our Lord 297
I always take precautions.
Beware the Evil Bullet Fairies.
