Are ar15 uppers and lowers compatible.

[Warp]

Unless you plan on literally dragging it through the mud

I don't plan on dragging my firearms across the ground. But it's not outside the realm of possibility.

I don't plan on having to shoot somebody with my firearms, either, but again...

 

[Newbie22]

Unless you plan on literally dragging it through the mud or shoveling dirt into the ejection port with the bolt held open, the dust cover is a solution looking for a problem. It was added in response to a problem that had nothing to do with foreign matter entering the action.

Would you mind clarifying this point? I'd be curious to know what the reason for adding the dust cover was if it wasn't in response to keeping dirt out of the internals.

 

[meanmrmustard]

I don't plan on dragging my firearms across the ground. But it's not outside the realm of possibility.

I don't plan on having to shoot somebody with my firearms, either, but again...

If it can't keep ALL dirt/mud out (which it can't), then it can keep SOME in.

 

[meanmrmustard]

PSA bolt carrier group $139.95
http://palmettostatearmory.com/index.php/m16-bolt-carrier-group.html

PSA charging handle $15.95
http://palmettostatearmory.com/index.php/ar15-m16-charging-handle-6332.html

PSA upper $269.99
http://palmettostatearmory.com/inde...ped-upper-without-bcg-or-charging-handle.html


New Frontier lower$109.95
http://www.joeboboutfitters.com/PlumCrazy_C_15_Composite_Lower_p/pc-lowerassembly.htm

A rear sight can be had in dozens of places for about $15.

Fully functional AR15 for just shy of $550.
If you need me to Google Delt-Ton, DPMS, Plum Crazy or ATI for you, just let me know.

Thanks for those links. They are, how do you say, clarifying?

 

[helotaxi]

Would you mind clarifying this point? I'd be curious to know what the reason for adding the dust cover was if it wasn't in response to keeping dirt out of the internals.

Yes, it will keep some dirt out of the action. The problem that the rifles were experiencing though, was that ammo was garbage and soldiers didn't have a way to clean the rifles. It wasn't FOD causing the problems. Dirt in the action was a convenient scapegoat for a logistical SNAFU.