im wondering what added benefits there would be to the AR platform should someone offer a steel receiver?... there are less issues when mating steel components to a metal receiver, added strength of course.. and then of course, added weight.. now ive seen AR-15 receivers crack from heavy impacts, drops, etc... and my dad who was an armorer/gunsmith in vietnam has gone through countless cracked receivers even then... so it DOES happen if they take abuse i like rifles that can take abuse and still work.. heck, hitting something with the butt end of an AR-15 stock would either break the stock off, or tear the steel buffer tube from the aluminum threads so its just not done... if the receiver was steel, would the threads be strong enough to handle such a hit from the butt of an AR-15?.. or would it need the added support of possibly a tang? which is quite doable.. and would the increase of an extra pound or so be worth it to have something that much more stronger, and more durable?... even with the issues of aluminum vs steel, i would still prefer an AR platform over that of, for example, an AK platform since you can actually buy brand new parts for it, parts are standardized so theyre all practically drop in, and theres a lot more customization with it.. im just curious as to whether or not it could be physically stronger, tougher what do you guys think?