>>63820061
If the PLX stinkbooger includes the auto live cap from factory, you should be able to buy a regular ass aimpoint t2 cap or a gucci kac cap and replace it.
>>63820058
>Build AR10
Nightmare. buy one off the shelf. Lack of a standardized parts pattern means you will be test fitting a half dozen ejection port covers.
>Is there a big difference in term of flash / sound when it comes to 16 vs 18 barrels ?
Not really
>Light weight 308 for a woman to go boar hunting
How about a midweight one and a cheapshit tripod?