Hello. I never carried my Bomar-sighted 1911 or BHP before retiring from police service, but have toted both on many, many hunting trips (not at the same time). Certainly, they're not as "tough" as fixed sights, but I sure think that they're tougher than S&W adj revolver sights. While I have seen officers break those, I carried a S&W M19 for about 8 years with no problems. If you want to carry your Bomar-sighted pistol on your "carry" gun, I'll bet you have no problems.
Best.