HAD A CHAT WITH DOUG FROM STUD MAG AND HE SENT ME OUT SOME PRODUCTS TO TEST OUT REVIEW, WILL DO MORE TESTS PLAYING WITH THE NEW MAGAZINE THEY MADE, ALL I CAN SAY AFTER 3 MAGS ITS FANTASTIC, VERY VERY SMOOTH AND SEEMS MORE ACCURATE AS ITS VERY GOOD TOLERANCE THANKS DOUG FOR THE PARTS. THE NEW DTM WORKS WITH THE OEM MAGS AS WELL AS THE NEW STUD MAG ALSO VERY NICE