Disadvantage: Non-Standard FP Stop
Another very small disadvantage of the IOS system is that the firing pin stop is non-standard. It has to be cut to match the rear of the dovetail that the mounting plate slides on it. The firing pin stop is not a very high-wear item. Of course there is always the possibility that it will be lost. so having a spare is a really good idea. Again, this is a very small disadvantage, but I would be remiss if I didn’t mention it.
Closing Thoughts
I was a reluctant adopter of pistol-mounted optics. Once I went in I realized what I was missing and I am a huge fan now. I will likely write an article on the advantages I perceive in using a pistol-mounted optic. For now though, I will just say that I really like them and if I were going to have a 1911 cut for an optic, it would be with the Nighthawk IOS system. With a cost starting around $450 (and going up if you require slide refinishing, etc.) I wish they would license this out to a cheaper vendor. I also sincerely wish that other 1911 makers could use this amazing system – it truly is the best thing out there.
My experience with this has been great. I sent the gun off to Nighthawk via my FFL after requesting a quote from them. Within about six weeks the gun was back in my hands. I immediately mounted the Sig Romeo X Compact Enclosed. I have run the gun with this optic and mounting system as my every day carry (EDC) for the intervening ten months. I have zero complaints whatsoever.
If you’re building a 1911 for serious use, I think you should consider putting an optic on it. And if you’re considering putting an optic on a 1911, the Nighthawk IOS system is the best thing going, without a doubt.
