I have the GG&G on my Armalite which came with a dovetail gas block. I don't have access to the rifle, but I don't think it had the locking detent like my other GG&G front flips, could be wrong though. They may have gotten around to adding the detent by now as it was a year ago, give or take, that I got mine from [url]www.mstn.biz[/url]. MSTN may still carry them. Think of it this way, it's better than the Bushy front flip, and I don't know of any other decent front dovetail that flips. Wait, just found a picture of it, and I don't see a button for a detent lock, but remember, GG&G may have changed it by now.
[img]http://photos.ar15.com/ImageGallery/Attachments/DownloadAttach.asp?iImageUnq=13417[/img]
[img]http://photos.ar15.com/ImageGallery/Attachments/DownloadAttach.asp?iImageUnq=13416[/img]
Edited to say, bottom picture sucks, but the original is better, I blew it up, and I don't see anything on the other side, it's just like the right side. I would say no, but you might want to check with GG&G.