The title says it all. I have both an M18 and M17 and know the Romeo 1 Pro and Leupold DeltaPoint Pro both fit without modification or adapter.

But which did you choose and why? My gut says the DPP is probably a little better quality but also is more expensive. The DPP also has additional read sights available to add to the optic. The R1P doesn’t give a rear sight option. Any other specific features of either people prefer?

And is there a consensus on pic mounted lights for the M18/M17? I have zero preference or knowledge on handgun lights. Help is appreciated. This will probably be my primary home defense pistol.

I am using a Trijicon RMR 2 and a Surefire X300 on my M17.

I did have to use an adapter plate for the RMR but I’m very happy with it.

quote:

Originally posted by neil0311:
The title says it all. I have both an M18 and M17 and know the Romeo 1 Pro and Leupold DeltaPoint Pro both fit without modification or adapter.

But which did you choose and why? My gut says the DPP is probably a little better quality but also is more expensive. The DPP also has additional read sights available to add to the optic. The R1P doesn’t give a rear sight option. Any other specific features of either people prefer?

And is there a consensus on pic mounted lights for the M18/M17? I have zero preference or knowledge on handgun lights. Help is appreciated. This will probably be my primary home defense pistol.

I have 2 Leupold DeltaPoint Pro on my Sig. The only other I would consider is RMR and SRO. The Leupold DeltaPoint Pro and RMR have been proven and tested. I wish the Sig would come milled for the RMR and SRO as well.

My M17 house gun has a DPP and Dawson M17 BUIS. The rear is blacked out, fits into the dovetail on the back of the DPP, and locks in with the DPP setscrews. Front sight is .400" tall green fiber optic. They are very low in the DPP window. I think this setup is better than the Leupold adjustable rear BUIS, and you get the correct height front sight, but it's still rather tall.

For an RMR, the Bobro adapter plate with rear BUIS is nice, but I much prefer a direct to slide mount. Short screws with only a few threads into an aluminum plate is not ideal.

Another option is to get the side drilled and tapped for RMR screws, then get the CHPWS adapter plate - it's very thin but adds the bosses for the RMR and some lugs on the bottom that interface with the slide. To me this is the best method to mount an RMR and I have done this on an X-Pro slide on an FCU build. But that slide came with the RMR holes and has a rear sight dovetail (same slide as an RXP).

If Sig every releases the Romeo 2 that might be the best option since it is direct to slide, with a built in rear sight notch that matches an X-Ray supressor hight front sight, and can be open or closed/sealed. It's not going to be cheap, and reliability is not known, but it looks pretty tough in the videos, and I think they are after Military sales, like they did with the Tango 1-6x LPVO.

I currently have a Romeo on my standard 320. I plan to get a slide with the M17/M18/Xfive/Legion cut and I'll be putting on an adapter plate to use an Aimpoint Acro P2. Closed emitter, not chinese, solved the issues with the intro model, and a good plate is available for it from FCD/TangoDown.

I currently have an XC1 on my carry P320. I like that its flush in profile and adds relatively little size and weight. I have an X300 that goes on the full size as needed.

DPP and Streamlight TLR-1 HL

I run an RMR (via a plate) and a surefire. literally the only two products in this space I would trust for serious use. I have run an acro, but until I have a P2 its back to RMR.