Hello First time poster. I would like to here opinions on the best complete upper for a PA-10 Multi Lower?
The best upper will be to get a PSA upper. With ar10s, there is not an industry standard, so it is best to get the upper and lower from the same company to ensure proper fitment. I recommend you look at their uppers that come with free float rails and without an FSB (Front sight). This way if you use a scope (which i assume you will) it isnt an issue. I also would take a look at the 18", as you have a little weight savings and length savings without jeopardizing a lot of performance.
Welcome to the forum man!
Guitar Guy hit it on the nose really. AR10s are proprietary to whos they are… so parts dont interchange like the do on the ar15s. I too recommend an 18" barrel for the weight savings you wont loose that much with going to a slightly shorter barrel, and the free float rails are better in my book than the fixed front sight block rifles because of the sight post being in the way and also i just like the look of a free float rifle much better. now there are probably some options on which barrel is in which upper from psa, some may be stainless, some nitrided coated, and others still with phosphate coated and chrome lined, maybe even some cold hammer forged barrels too, and that decision should be based upon your planned usage, and your preference really. almost all will have the same twist rate especially if theyre from PSA, so you shouldnt worry about that.
Thank you Gamecock Operator and GuitarGuy - I really appreciate both of your inputs
youre welcome. anything we can do to help. 