I don't have a scale readily handy right where I'm at (that would do sub-units of pounds anyways, to get exact). But here's a way to find out, and some notes on that subject: As I said, the particular scoop started as a long-handled readily available one from ebay. And the seller has a store there, as I said. If you go to his listings, find one of his long-handled scoops, and .... if I'm not mistaken, he has the weight listed right there. Then what I did: When I got it, I cut the last 3" of it off with a hack-saw. Then had an employee of mine, who has stainless welding ability, attach that portion to become a pistol grip. So then, in essence, the only weight added thus far, would be whatever solder it took, and the bicycle grip plastic sleeve thing.
Then the arm-cuff weight, whatever that is. You can either fashion scrap metal (about the thickness of sheet-metal tin, that's bendable with mere hand fashioning). Then I used some bailing wire to use as the top part (to keep my arm from flopping out). And then the two bolts and nuts to hold the arm-cuff to the end.
HOWEVER, when I made my order from the ebay fellow, he customized mine, and used a lighter gauge stainless steel pipe/rod. And did NOT put in the "foot-push" bracket. And went a little lighter on the brace-rod. All those things lightened it up (so my starting weight would be lighter than the ones in the ebay ads, perhaps). And... in my opinion, did not compromise the strength. He said that some of his customers wanted the extra strength (because they "pry", for example), and that weight wasn't as much of an issue to them (because they use two hands, and were not intending to make it a single arm-use-device). So I took a gamble and custom ordered one, to lighten up on those couple of factors. And no matter how hard my down-swing, it's every-bit-as strong as I'll ever need.