Glock leg is a training issue and Glock fixed the issues. Sig and FN both deny their design flaws. Not to say its a bad pistol but Glock does not seem to be having these issues ,currently.
" Three pistols experienced a trigger pin either backing out or moving slightly out of position. This trigger pin is a component that requires routine maintenance "
" Glock leg unknown A condition where a person shoots himself (or herself) in the leg while holstering their Glock pistol. This can happen with any weapon yielded by a careless user, but it is common among Glock pistols due to the lack of a manual safety, relatively light trigger pull, and lack of a proper hammer to push on while holstering. "