Originally Posted By: AWSI'm thinking about building a lightweight AR, is there much difference in weight between these and AL? Are they reliable??
in the family we have a selection of poly lowers built right now. calibers range from 5.56 to 458 socom. ive run my 450 bushmaster on one, probably stuffed about 70 rounds thru it.
were using the EP armory 80%'s, theyre affordable, available, and durable.
they use a glass filled nylon for their poly.
good friend of the family used to run one for 3-gun. said he wanted something both light and cheap that he could beat the living cr@p out of throwing it into the safety bins at the end of stages when switching firearms. said he ran it for multiple seasons and never managed to break it with that kind of abuse.
one thing to note - if you do build a poly - make sure you 100% use a KNS style anti walk trigger pin set. regular mil spec pins will not hold, and you will destroy your trigger pin holes mucho early without them.