looking for some stock recomendations, I think i want fixed but undecided any input would be greatly app. pros/cons,fixed,adj.lenght what spring, buffer..thanks and happy easter.........
Personally, I'd go adjustable. Depending how crappy the weather is, you may have a lot of clothes on, or you may not. So depending on layer thickness you can adjust the stock where the LOP feels right.
As for a stock, I'd probably look at a STR, they have a bit of a cheek piece but nothing that sticks out like the battery compartments on the ASC. Hogue is starting to make AR buttstocks too, I'm curious to see how they'd feel.
Normal H buffer and carbine spring should be more than enough. Might go H2 to soften the recoil a bit but if it functions perfectly with a H buffer, I'd leave it be
For me it depends on what the rifle is going to be used for. For a long rang/precision rig I would go fixed. For run and gun go collapsible. Buffer would be H at least but again would depend on barrel length, gas tube length. If you are running a 18" or longer with rifle gas and want a collapsible stock look at the Vltor V5 stock. If I remember correctly it was designed for the Marine Corp for there 20" rifle so they could run collapsible stocks.
I just completed a 458 build and went with the Magpul UBR. A bit expensive, but gives you the best of both worlds. The stability of a fixed stock, but adjustable like a traditional collapsible stock. It includes its own proprietary tube and then you just need to use a spring and buffer for a collapsible stock.
I don't have any experience with the 450, but when I was researching my 458 build every place said to not use a H buffer. Unless you find otherwise, I'd just stick with the standard buffer.