Couple of points wrong on the A1 stocks.
A1 stocks are 5/8" shorter than A2's not 1"
A1 stocks DO have a trapdoor area (It's the M16 stocks that didn't have it). I rarely come accross surplus A1 stocks w/o the trapdoor - and ALL of the Cav-Arms C1 stocks (Modernized A1s) not only have a trapdoor - their storage compartment is about twice what a typical A2 stock has.
Costs.. $55-$90? for an A1? You shopping on Hollywood & Vine again
? Surplus A1s start at $20 and go up. Brand new C1 stocks (in your choice of color) run $40 (including the buttplate and screws).
Note A1 pistol grips are not 'similar to A2 grips' they are very different. Narrower, they lack the finger shelf, and they lack the serrations on the rear.
The M16A1 upper you show is really a Canadian C7 upper. The M16A1 didn't have a brass deflector.
(can you tell I was issued an M16A1 'back when'?)
Not a bad start all in all. You might want to go into WHY you have chosen the options for you rifle setups (i.e. why an Ergo Grip on the SHTF vs say a Tango Down Battlegrip (where you can store batteries for your light and/or optic); or why the clubfoot vs the standard.
If you need more info on furniture and such here are some resources:
StocksMuzzle DevicesHandguards & Pistol Grips (Still under construction)Also be sure to see the thread tacked up at the top of the Rifles/Uppers/Lowers forum as it has lots of information on the various railed handguards.