Originally Posted by kos
It'll break on you pretty quick. Not to mention all the scratches/dents you'll put in it from having it slung on yer back..
There are several benefits to a plastic-bodied gun. They are lighter, cheaper to buy initially, cheaper to replace when they break (and metal bodies DO break - look in our buy + sell at the number of people selling either metal uppers or lowers, because the other half broke), and they usually fit with absolutely no modifications required. I have a TM M4 that's plastic-bodied and 7 years old and a plastic-bodied P90 that's 5 years old......both bought new, both still work like new, and look pretty close.
The main way to break a plastic bodied guns is if you are a hamfisted moron with no sense of balance who dives/falls on their gear on a regular basis. This behavior will also break metal-bodied guns, by the way. If you treat quality guns with even the slightest modicum of respect, they will last for years. There are a number of gun docs, myself included, who run stock-bodied TM Armalites as their primary weapons. Try and find a stock TM plastic Armalite body in the buy and sell - they are rare as hell, because all the gun docs want them, myself included. When people who know these guns inside and out leave them stock, that in itself should tell you something.