Have ALG triggers in both my 7.62 & 5.45 Veprs…simple install & I used the supplied roll pins in both. Would recommend you order a spring so you don't have to disassemble the stock trigger assembly.
The Magpul stock…it's poly/plastic and have heard of breakage in the hinge. Might consider the Bonesteel folder/adapter assembly, it's all metal.
Grips…the Hogue has a nice non-slip feel/texture.
The supplied rear sight is adjustable for windage and elevation, might consider using it for a while before going to an aperture or contact Rifle Dynamics in Vegas for one of their modified pieces.
Red dot…get a good mount, Arsenal SM-13, RS Regulate or Midwest Industries that will hold zero. Gas tube rails/sight make the front end heavier than it already is…due to Vepr bull barrel.
Muzzle brake…easy to remove nut with Dremel & install brake style of choice.
Hope you enjoy your VEPR!!