AR10 - DPMS .308 - SR25 What is best for build?

[kcstott]

Lewis machine & tool and be done.

[LBDamned]

I have heard of too many failures with a .223, .308 is bound to be worse.

Not much of a confirmation for the statement "don't do it"... With all due respect, things like "I heard" and "bound to be worse" aren't worth considering...

FMK lowers were known to fail (so I agree with staying away from them)... NFA (which I also have) and TN Arms poly lowers don't have the failure reputation they you may have "heard" about...

Of the 7 ARs I have, two are poly (one NFA, one TN Arms) the poly function the same as the others.

Having that been said - other than weight or cost, there's no specific reason to use poly over aluminum.

[VaderSpade]

Failure stories are not hard to find.

[valley82]

Remember when I said quality parts from known suppliers...plastic lower was not on that list...your rifle, your money, your choice but I wouldn't bother with plastic on an AR where aluminum should be...even more so on a 308 AR.

[LBDamned]

Failure stories are not hard to find.

For the lowers I referenced?...

[nate76239]

Quentin Defense 80% 308 lowers are $99, uses magpul lr308 pmags. They are aluminum

http://quentin-laser.com/store/product_info.php?products_id=269

[Angry Bill]

I'm going to do the Aero M5 dpms pattern.

I thought about the cheaper PSA or PTAC but the takedown pins on those are custom, and something about their bolt release also being special between their uppers and lowers.

[Dhena81]

Lewis machine & tool and be done.

That's what I did. Just picked up these 2 last month. I've wanted a MWS for a long time and picked the 16s to go along with its bigger brother.

[Dusk4Ever]

http://80lowers.com/80-lower-receivers/ar-10-308-billet-80-lower-receiver-dpms-raw.html/

Ultimately I chose this one and just ordered it with a jig for completion.
Viper Defense in Oregon