Need help with ID

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Any ideas on what this might be and if it's any good? No visible markings, maybe Chinese? .177 cal.
 
I had to go through a hell of a lot of these Chinese B3s over the years to finally get one that shoot good (I SIMPLY COULD NOT BELIEVE IT).

I gave them away for FREE (almost) just for the cost of shipping. This last one I will keep since it seems to be a real freak of nature totally uncharacteristic of them in the accuracy department. I would guess it's a 1 in 1000 chance in barrel lotteries based on how terrible my others shot.