Mine is a Daniels Defense 10.0 lightweight, saves weight but pricey@$350. Samson, Troy, LaRue and Midwest Industries all make high quality freefloat forends but are a few ozs heavier. Yours has the pencil bbl so it will be about the same as mine if you pick the heavier rails. Surefire makes a nice non-float rail, just snaps in place. Actually that may be best, you are not going for bugsize groups.
Avoid YHM and UTG rails, they have fit issues with some foregrips and light clamps.
That grip is a Tango Down, allows storage inside for batteries or spare bolt/firing pin/extractor. @$55
The pistol grip is a Magpul MIAD, allows storage, several configurations, easy install. $35
The trigger guard is a Magpul too, milled aluminum, extra room for gloved finger.@$20
Back up iron Sights are Troy @$250 a set
Light is a pentagonlight M3 light/laser @$350. Surefire makes topnotch stuff too. Figure $150 at least for a good one, the kind you buy once.
The trigger in it is a 2-stage match from Rock River Arms, it will fit in the Armalite or the SNS. About $80
Nobody local to get the good stuff from, I deal with vendors on arfcom. Several in fact.
Dozens of ways to accomplish it, too many to type more. Gotta get back to my jack-n-coke:secret: