cz75b

google fu says a dog snapper,or perhaps some kind of monster grouper

in,large

thats magpul furniture cant see enough of the reciever to tell but 50/50 a mossberg 500 or rem 870.

thank you for offering this,add me to the list please.

the first one is the thorsden enhanced cheek rest

I'm guessing that means you never fly either?

lol,ill get right on that.

its an sp1 upper,the sp1 had a larger front hole that took a screw rather than normal takedown pin

lol...you guys realize that was 15 months ago right?

or you could just go with a cz sp01 if weight wasnt an issue,if it is then sp01 tactical then you get the polymer frame.which sells new for what those other 2 are used if i'm not mistaken.

its a 6.8 necked down to a 223 bullet.so it does take a normal ar15 lower

umm unless im missing something the interwebz says no

the 6.5,308,224 valkyrie and a few others actually use the ar10 lower.the 5.56,300,7.62x39,6.8 and 9mm with a block all use the 5.56.I'm sure i missed some calibers but that's pretty much the jest of it.

what mags it uses is determined by the lower.also that upper comes with hybrid bolt so it can work with either lower.so get a lower that uses glock mags if you have a surplus...if not get the colt lower either works.its a personal preference.

ive bought one of the upper kits before and it worked fine on a rock river arms lower with the mag block.so unless they went to some kind of proprietary upper you should be fine.