Dicks Sporting Goods on Wednesday will stop selling semi-automatic rifles and impose an age requirement to purchase any gun, its CEO told ABC's "Good Morning America" program.

The chain also announced in a letter to consumers that starting Wednesday, you need to be 21 to buy a gun at any of Dick's 700 stores, and a semi-automatic long gun will no longer be on the shelves of the company's 35 Field & Stream stores.

"We looked at what happened and we were truly deeply moved and disturbed by those events," Dick's chairman and CEO Ed Stack told GMA. "When we saw what the kids were going through and the grief of the parents and the kids who were killed in Parkland, we felt we needed to do something.

"These kids were brave enough to stand up and, so we should be brave enough to stand up, and I hope our lawmakers will be brave enough to do that," Stack said on GMA.

In a letter to consumers, Dick's is imploring lawmakers to "ban assault-style firearms."

"We support and respect the Second Amendment, and we recognize and appreciate that the vast majority of gun owners in this country are responsible, law-abiding citizens. But we have to help solve the problem that’s in front of us. Gun violence is an epidemic that’s taking the lives of too many people, including the brightest hope for the future of America – our kids," Dick's wrote in the letter.

Further, Dick's also outlined the company's new vision to consumers:

"We will no longer sell assault-style rifles, also referred to as modern sporting rifles. We had already removed them from all Dick's stores after the Sandy Hook massacre, but we will now remove them from sale at all 35 Field & Stream stores," the letter read.

"We will no longer sell firearms to anyone under 21 years of age. We will no longer sell high capacity magazines. We never have and never will sell bump stocks that allow semi-automatic weapons to fire more rapidly," the company wrote.