The end?, The reaper?

I finally finished it and watched the ending it was when parker flew off leaving hale in an exploding buildin and then after the credits you see hale messed up and a helicoptor comes five men et and hale is thincking about dropping a grenade but in he doesent and thtasthe end. Anyway it says that ive unlocked new weapons so i go on it just fora laugh afterwards and i find the reaper witch i dident have in my previous game. I'm wondering if this is one of the unlocked or did i just miss it. (I also missed that gun with the electric coming out i know i werent missin out on mjutch but still) thanx

Yea the reaper is an unlocked weapon, and so are the backlash grenades.