Hatsan Flash .25. I bought it and immediately started tinkering... I put a huma reg in it with the larger plenum, donnyFL tanto, then opened up the air port a little. In its stock form, it was putting out 38 ft-lbs with 33.95 JSBs unregulated. I had it up to 41 ft-lbs, but regulated with NSA 33.5 slugs. Then bought a yong heng compressor, built a radiator cooling system and put all that on a welded up air rifle cart, some SCBA bottles, a billion other little things.. but I wanted more... So I bought an FX impact 700mm with the slug power kit and Huma High flow dual-port. Dang this hobby got all encompassing quick.
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