I.am fixing to.buy a dpms ar 10 do they hold up.Good ? I.have had h&k,91-36 years and they are built.like tanks compared to.These ar10 .Is a Daniel defence recover stronger than a dpms receiver ? DO Mapul at 10 magazines work.Good in these guns .This will be an awesome gun if it works right .I hope so I.have Been wanting.to try one in.260 rem and 338 federal .