http://www.dakkadakka.com/dakkaforum/posts/list/69.page JForum - http://www.jforum.net
I am starting a new army (White Scars successor chapter), and while I don't intend to spam grav guns, I definitely need more than what comes with the boxes. I searched the usual suspects for an analogous bit, but found nothing convincing. I tried eBay, but the guns are $10 or more, and I just can't psychologically pay that much for a bit that small.

Anyone got any ideas? TIA]]> http://www.dakkadakka.com/dakkaforum/posts/preList/557237/6138800.page http://www.dakkadakka.com/dakkaforum/posts/preList/557237/6138800.page GMT
You could find a 3rd party bit you like and use it consistently throughout your army.

You could buy tac and/or sternguard boxes for the ones you get there. Both of these are nice kits in their own right, sternguard especially.

Find a friend who has extra. Remember, sterns/tacs are available to more then just vanilla marines. A DA player who's picking up a new tactical squad box will have no use for the grav gun.

Leave the arms of the bikers empty for now and wait for the price to drop.]]> http://www.dakkadakka.com/dakkaforum/posts/preList/557237/6138827.page http://www.dakkadakka.com/dakkaforum/posts/preList/557237/6138827.page GMT
http://www.forgeworld.co.uk/The_Horus_Heresy/Legiones_Astartes/Space_Marine_Legion_Army_List/Legion_Troops/Legion_Tactical_Support_Squad/VOLKITE_CALIVER_SET.html

http://www.spellcrow.com/gravity-guns-p-197.html

http://maxmini.eu/matter-displacement-guns-bits

I don't know if any of those are worth it after shipping costs...]]> http://www.dakkadakka.com/dakkaforum/posts/preList/557237/6139381.page http://www.dakkadakka.com/dakkaforum/posts/preList/557237/6139381.page GMT GK Psilencers. They are rarely used so plentiful. And only confusing if you are running GK allies in same list (which I'm not doing)]]> http://www.dakkadakka.com/dakkaforum/posts/preList/557237/6144042.page http://www.dakkadakka.com/dakkaforum/posts/preList/557237/6144042.page GMT ]]> http://www.dakkadakka.com/dakkaforum/posts/preList/557237/6144622.page http://www.dakkadakka.com/dakkaforum/posts/preList/557237/6144622.page GMT