IMO, the chances of ANY firearm legislation being passed

[jimmy the one]

3. adam lanza was a 'good guy with a gun'

FURTHER, you will NOT get all the House democrats to sign on to ANY bill that limits in ANY WAY firearm possession in ANY way.

Correct but probably all but a half dozen imo;
.. as far as meaningful legislation, an assault rifle ban will likely collapse, since it's actually banning about one percent of the national gunstock, horrors; such the infringement on the intended 2ndA RKBA, when one single AR15 could've won the war in a month if possessed by either the british or george washington.

On the hi capacity ammo clips & the gunshow loophole (where background checks are sidestepped by private to private gunsellers & gunbuyers), a bit different, & it'll be interesting to hear how the gun lobby justifies keeping both those issues off the congressional table.
.. ie: we need the gunshow loophole because the only way to stop a bad guy with a gun is a good guy able to buy a gun without a bg check?
.. but howso the argument for ammo clips?

PS wayne, the connecticut shooter adam lanza up to the minute he killed his mother, was 'a good guy with a gun', according to you. About half the gunmurders in america are done by 'good guys with guns', acting irrationally or spontaneously.