Have you tried E&L Manufacturing? I have one for my AR-15. It works pretty good,only holds 60rds. They advertise a new catcher for flattop ARs.I'm going to order one for my AR-10.H TH.
I noticed the scope ring.
Looks like an easy thing to make.
But theirs is only $80.
I like that it folds flat to my rifle to fit in the case.
Those brackets might be tougher. But if you can find an old
babay stroller with a fold down cover it might have those brackets.
I've been using this Tactical Brass Recovery bag successfully for a couple of years now. Got one of their prototypes when he was just designing them. It's a great bag. You don't have to take it off to put the rifle in a gun case, rifle rack, etc. because it folds flat. You don't have to remove it to clear a jam, etc., etc.
I had to modify the AR-10T free float hand guard though. The AR-10T doesn't have a Picatinny mounting point on the right side near the ejection port. The slots are all cut too far forward. So, I had to take the hand guard to a milling shop to have a slot cut in the rear side of the hand guard so I could attach a Picatinny rail. It works great. I originally attached a Picatinny rail using black hose clamps which worked well, but wasn't the look I wanted. I posted pictures of the hose clamp attachment on this site a while back. I didn't want to purchase one of those multi-Picatinny hand guards since they cut your hands unless you buy covers for all the Picatinny rails and aren't as comfortable even with covers to hold as the standard AR-10T hand guard IMHO.
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