here's my CA-compliant M&P15 Sport:
S&W M&P15 Sport
Primary Arms Red Dot
Magpul MOE Stock, Grip, Handguard in FDE (Stock pinned for CA-Compliance)
FAB Defense Sling Attachment
DPMS Magazine Release Button (Replaces CA-Compliant Bullet Button)
DPMS Magazine Release Spring (Replaces CA-Compliant Bullet Button)
YHM Thread Protector (CA Compliance)
Solar Tactical Grip Wrap (CA Compliance)
Magpul PMAG 30-round rebuild w/Ranger Floor Plate
Specter Gear 2-point Tactical Sling
Not Pictured: DPMS Ambidextrous Safety Selector
Just love living in CA