Need advice on enlarging ejection port.

[Kenney0928]

So I tried joining the ar15 forum but they made that harder then it needs to be. So maybe someone here can help even though it's not a grendel question. I'm building an ar pistol in .45 acp I think I might have over did it when enlarging the ejection port. From the descriptions I found online it should have been just under 5/8". But I got a little crazy with the dremel and it's just under 3/4". I didn't get in to the rails the bcg rides on. I took some from the bottom but more off the top. Will this hurt anything on a blow back ar15 once I get it together?

[Sticks]

Might try posting this in the Troubleshooting Section, or Custom build.

[bj139]

This is a hypothetical question. Only trying it will tell you.

If it was me, I would just try it. Maybe strap to a gun rest and discharge with a string if you are super concerned.