front sight issues Springfield 1911

The front sight has come loose on my S/A 1911 loaded model. It's about 10 years old. I had a dawson fiber optic installed years ago. It has come loose twice, this time I can push it thru the dovetail cut with my fingers. 

 The base of the sight measures .340. Which is what Dawson shows. If I order a new sight from dawson will it be too loose?  I was looking at the Kensight options but there fiber optic sights are only .330. 

Do I need to stay with Dawson or does anybody know of a different brand that will fit the S/A dovetail cut. 

Thanks

https://dawsonprecision.com/dawson-precision-springfield-1911-fiber-optic-front-sights/

https://www.1911addicts.com/threads/springfield-dovetail-cut.4081/

Backyard Bodge
Take the sight out and use a small punch to deform the base of the sight's dovetail slightly by dimpling it a couple places.  That will tighten it up for quite a while.

+1.  I've done this on numerous guns.  Sometimes you'd be surprised how well it holds.

Loctite