Ok, polymer lowers, how about a polymer upper?

[dscottw88]

I know it's been done, Bushmaster has a line of carbon 15's that seem to get different vibes depending on whether the person likes plastic or not. But while researching a super light weight build, I noticed that bushmaster has stripped polymer uppers.

But what I'm asking is this; Does anyone make a monolithic polymer upper?

Here is a mock up of what I'm thinking...
http://i257.photobucket.com/albums/hh234/m4dscottw88/SuperlightARMock-up.jpg

[Chowser]

i will have to look, but i think my s&w mp15-22 upper is polymer.

[WoodenPlank]

i will have to look, but i think my s&w mp15-22 upper is polymer.

That's a dedicated .22 upper, though, not one intended for 5.56.

OP, I'd suggest sticking to aluminum. The slight weight savings you would get by going to a polymer receiver can easily be made back in other areas (barrel profile, rail/handguard, stock, etc), and the polymer receiver potentially compromises safety and reliability.

[The Pirate]

I own a carbon 15 stripped upper that bushmaster caused me to ruin with bad information. After seeing how week they can be I will stay away from them. Good luck


Outdoor Hub mobile, the outdoor information engine