Have you thought about trying to use some epoxy putty? You could then try to paint it to match.
Thinking of that just as I read this. I've got some Green Stuff from years ago, when I did tiny things with customizing Legos, and had to use it today to fill in a small gap while shaving and sanding my G23's frame.
The biggest issue is that the space is directly over the blow back chamber. That means there are tiny springs moving and the cylinder. The sight leaves a half rectangle shape like [ with the springs and cylinder in the concave space. I think either JB weld or welding on material is the only reliable way to seal it up. Anyone know how JB weld handles impact stress? The piston is attached to the site and every time the slide goes back the rear site takes a hit.
I have been stupid busy lately, but I finally got around to taking some shots of projects I started earlier this year.
Polarstar Fusion Engine V2 Gen3
My Polarstar arrived a while back. I haven't had time to play around with it or try installing it into anything yet. I have the green, blue, and red nozzles so I should be good to go for any field or rifle combo. Will be ordering the air rig soon. I'm really impressed with the build quality and I have done nothing but picked it up.
My plan was to put the Fusion Engine into my Barrett M82. I still plan to do that for fun, but it isn't something I would bring to a serious game such as Northern Light. I plan to run the Fusion Engine in anything I have that it will fit into but I decided to build a dedicated platform for it. I chose to build a MK12 SPR. I used a G&P M16-A1 lower which is correct and has a subtle grey hue to it, and a G&P M4 flat top lower which has the darker M4 color. The real steel MK12 typically has that color difference and I think it really adds to the replica. The body has not yet been fully assembled so some bits are missing. I'm a little iffy on the SPR grip so it might change. The stock is borrowed from my M4 and I don't know if I'll buy another to use on it or switch to something else.
MK12 SPR Mod0
I would be remiss not to have the OPS Model 12th to go along with it.
Noticed something funny about my scope mount. I prefer the single point mount over the correct rings as the scope moves between rifles. One QD mount is easier to deal with. While taking pictures I found out my scope mount is actually an SBR suppressor. Oops.
A CAR-15 Stock with a butt-pad would complete that bad boy. That E-Mod looks out of place.
I think the Emod does look a little out of place, but I really like it. It has great battery storage space and I get a really nice cheek weld. It also shoulders very well. I have a CAR stock and I really don't like it. Their just too small for me. Anything else anyone can think of that I should try? I honestly want to try a PRS stock but I think that would look pretty awful.
The more I think about it the more I like it how it is. I'm more function over form and the E-mod, which admittedly does look a little out of place, is a great stock. The ACS L would probably look good and I would like to try a standard CRANE stock. I don't think anyone I know has either. Time to buy I guess.