So far so good, but could be a little tall for some (used with romeo 5) - Strike Industries T1 Riser Mount for AR Platforms, Steel

I bought this for the SIG ROMEO 5 for a lower 1/3 cw and the SIG factory tall mount it absolute. This riser with the ROMEO 5 is lower 1/3 without the extra spacer (i.e. only the spacer labeled "absolute" installed). With the lower 1/3 riser it almost completely obscured the irons. For reference I'm using the DD fixed irons.

Overall the construction feels solid, but that will be proved over time. I like that they gave you everything you need for install including the allen key, torx key, a set of long screws, a set of long screws, and loctite blue (I used my own and only a very very little amount). Overall I would recommend if you are looking for a lower 1/3 co.