Hello Everyone, I am not one to leave reviews (especially negative reviews) but feel this needs to be known. I recently ordered 7- CZ75 MCARBO Spring Kits for my TriStar Pistols. I ordered these because I was told if they did not fit I would be able to return them for a FULL REFUND (I have a chain of emails to prove it) That being said I kept one of the kits I had already installed (minus some parts of the kit that didn't fit) because I didn't want to go though the trouble of removing the MCARBO Spring kit I had installed which by the way made a very minimal almost unnoticeable difference vs. the 40-50% less trigger pull they claim. I returned the other 6 kits back to MCARBO for a FULL REFUND as I was told i would receive. I finally received a refund from MCARBO minus the return shipping cost which they failed to mention to me (not a big deal only $4.04) but worst of ALL they kept the Sales Tax which they say they do not refund ($17.44) which is Totally Illegal to do !!!!! I wonder how many MCARBO Customers have been ripped off their hard earned money by paying taxes on an item they returned ???? Is MCARBO paying the government this Sales Tax that they are NOT refunding their Customers ??? I highly doubt it !!!!! SOUNDS LIKE TAX FRAUD TO ME !!!!! I will be contacting the Feds to report them along with filing a complaint with the Better Business Bureau. Stay away from MCARBO at ALL COSTS (Pun Intended) You have been warned !!!!!