No, the trigger should drop into the lower receiver and then pin into place, no extra hardware is needed.
Shipping time is dependent on in stock availability and processing time. If the product is in stock, it should be shipped out as soon as possible.
The trigger is not included, as the fire control group is not included in this complete lower receiver parts kit. Please contact techsales@opticsplanet.com for assistance in finding the right trigger for you.
It does not include trigger pins as the fire control group is not included in this lower parts kit.
No, as stated in the specifications, "Fire control group and grip NOT included."
Some parts are compatible with AR10, however not all the parts are compatible. You would be better served with a lower parts kit for 308 AR's like the one linked below.
https://www.opticsplanet.com/aero-precision-m5-308-enhanced-lower-parts-kit-w-no-fcg-or-pistol-grip.html
It will be more of a parkerized or phosphate finish on the parts.