My Glock 40's always gave me Glock knuckle ( the trigger guard bangs the knuckle on my middle finger under my trigger finger and it hurts) so I did not shoot them much. Then my 9mm's started giving me Glock knuckle. After talking to a few people I found this problem to be bigger than I expected. The Rangemaster at the the indoor range I frequent complained about having it. An IPSC competitor showed me how he had used to a dremel tool to cure his Glock knuckle. I am fixing to use a dremel tool on my Glocks and I am looking for advice from people, who have successfully cured this problem by doing so. Thanks.