by Eyes On » Fri Jan 29, 2010 12:33 am
The key to getting a good bond is surface prep. If the rail is metal, strip the finish from the bottom, and rough up the metal surface with 80 grit. Don't be neat about it, you're not reducing the metal, you're trying to scratch it up. If the rail is plastic, just scuff it.
Do the same with the top of the receiver on the gun.
Metal Rail + Plastic Receiver = JB Weld or similar mass fill type bonding agent. Gorilla Glue will work, but use only 2-3 small drops and don't add water. You'll still probably need to give it a once over with a razor blade to get rid of excess while it is wet.
Plastic Rail + Plastic Receiver = Super Glue or other Cyanate Epoxy (model glue or similar depending on the plastic). A plastic weld might work too, but that's a lot of work.
In either case, contact cement on a prepped surface should work too.