Very nice im E-filing mine today never used it before so this will be interesting. But so far i found a 551a1 aluminum lower with sig brace (US made) but at least it takes swiss mags, and some swiss 550 handguards they will be cut down and drilled to look like 553 handguards once i locate a handguard retainer. Still on the hunt for a 4 prong US made version of the 552 flash hider (the thread pitch is different) and some diopter sights but i need to let the fund gun build up a little more before i order those. So hopefully ill be able to find a reasonably affordable stock once the form 1 comes back about $350 for a swiss stock (i wonder if take off US made ones are available) it will help with the 922R.
Nice! Post some pics