Washington (CNN) Another National Rifle Association board member is stepping down amid turmoil in the gun lobby group's leadership.

Julie Golob, a professional sport shooter, announced that she will not be finishing her full three-year term as an NRA board director, making her the fourth member of the group's board of directors to reportedly resign in the past month.

"I am proud to have had the opportunity to represent the members of the National Rifle Association but I can no longer commit to fulfilling the duties of a director," Golob wrote in a brief letter posted to her website.

Golob, who declined to comment to CNN, did not mention any of the controversies currently facing the organization, which include legal troubles, allegations of financial misconduct and other high-profile staff departures. The pro-gun lobby group also is under pressure in the wake of two mass shootings.

Golob said it was "not a decision I made lightly" but felt it was the "best decision for me and my family."