Personally, I have no experience with the G36K; however, they do have great internals (the GEN 3 versions); I heard their might be issue with the fuse apart from that it is a pretty good starter gun. * I assume you are referring to the cansoft version sold by 007 airsoft*. For outdoors, it truly depends on your play style (IF you prefer engaging from a far, then you will want a longer inner barrel; or if you are like me and like to charge/CQB then you can go for a shorter and less bulky aeg like an mp5 or a m4-CQB or an Mp-40
). My advice before buying, go check the doctor's corner and if the name of your aeg appears often - you should maybe consider another one.
when it comes down to your first AEG; go for something you like or it will ruin you airsoft experience. Then, you can worry about having an authentic impression (BDU are cheaper to replace than an AEG).
you should also get Age Verified; G36 and M4 with metal bodies or opaque bodies are available from the classifieds or from retailers.