My LB PII is a '99 production model, or LB's 2nd year of production. Love the gun, but the mags weren't all that great. My EB ET was bought in about '12 or so. Love the gun, didn't like the mags. My SA TM was 1 of the 1st ones out but I can't put a yr to it. Love the gun, but the mags weren't good enough for me to keep around. My SA TGO1 was bought in about '14 or so. Again love the gun & again didn't care for the mags. My WC Classic SG was bought in about '11 or so. Love the gun but over priced & over rated, but love the ETM mags. The 6 or 7 mags came with the gun but I really don't know if I would buy the mags at their current price. Probably would. My 4 MF's were bought in late '80's or so & I love them. The difference between love & hate for me providing that they work is how smooth they collapse & return to battery, how hard they are to compress, how easy do the accept rounds put into them, & form, fit, & function of the followers. I prefer round followers with no sharp edges. YMMV.