First post, and I'm excited to learn a few things. I've started my first AR build recently. So far I have a ST stripped lower and Magpul MIAD in OD green. I'm waiting on a few things to come in, the biggest is a ST enhanced LPK with the combat trigger. I bought it mainly for the nickel boron parts. My question is this: if I buy a nickel boron BCG, is there really any added benefit to paying for a piston driven upper? Also, does anyone know if the Magpul BAD lever will work with an ambi mag release? I have a Magpul ASAP and an Omega Tactical buffer tube kit coming in also. All I need is an MOE stock in OD, BAD, and ambi mag release to complete my lower. Then the upper hunt begins!