Taken from a 2nd Gen Krytac LVOA-S.  When I fitted a RS Magpul trigger guard in matching colour a part of the lower where the spring pin goes through snapped off; it is fully and tightly retained by the pin that's hammered through it so that part isn't ever going anywhere and it has zero functional affect on the lower, only aesthetic.  It's entirely possible to integrate this lower in to another gun and be 100% fully functional you'll just have a visible line near the trigger guard as shown in the pictures.

The gun this was mounted to was never fired or skirmished, so the general condition aside from the break is very good, there's some paint damage on the opposite side to the break but that's about it.

Supplied exactly as pictured so you'll need all the relevant donor parts from another gun.  Exactly which other models of AEG this can be fitted to I do not know for certain, that's buyers' responsibility.  I'd imagine any other Krytac with ambi selectors will accept this lower and will already contain all the other small donor parts necessary that will fit (receiver pins, mag release, bolt release, right side selector lever) but again that is buyers' responsibility.