This pickup can be seen in the neck of his new guitars, to replace the Fernandes Sustainer

A staple of syn's arsenal since Self-Titled Era. It is responsible for the endless feedback and note sustain that can be heard both live, and on record. His signature models (Synyster Gates Custom-S models) come with a sustainiac built into the guitar. It can be seen in the neck position. Syn Gates has a sustainiac model for nearly all of his guitars.

"Common features on his signature guitars include Kahler Tremolo systems (same model as Jeff), EMG pickups (typically his signature set of KFK 81/85), a PA2 gain boost circuit, and occasionally a Sustainiac – he used to use a Fernandez Sustainer but his new Dean V features a Sustainiac."

in this photo, one of zacky’s personal guitars, specifically the Schecter ZV Blade. As you can see the guitar on the left side of the photo, it has been modified with a sustainiac system for unknown reason.

at 39:07, Alessandro shows off a guitar featuring this pickup

Adrian uses Sustainiac neck pickups, according to Guitar Geek's rig diagram.

Steve Stevens uses the Sustainiac Neck Pickup in his Knaggs Steve Stevens Severn XF guitar, which was designed to mimic the look of one of his old guitars, as revealed in a "Rig Rundown" by John Bohlinger on Premier Guitar.

Kenny Hickey uses the Sustainiac Stealth Pro Kit in his signature Schecter C-1 EX S guitar. This is confirmed by the specifications listed on the Schecter website and visually verified in a YouTube video by Jessup Amps, where the Sustainiac pickup is clearly visible at the 0:10 mark.

Throughout this video, Dweezil Zappa can be seen playing a Cherry Finish Gibson Frank Zappa "Roxy" SG, equipped with a Sustainiac sustainer system in the Neck position, and a Maestro Vibrola bridge.

"Sermon’s BiLT Relevator is finished in shoreline gold and features both an MXR Carbon Copy and BiLT’s own fuzz circuit built into the body along with a Sustainiac in the neck position. Sermon can control the parameters of the effects via a wealth of buttons, switches, and controls that are accessible on the front of the guitar. There’s a Pedaltrain Volto on his strap that supplies power to the pedals via the stereo cable. He keeps this guitar tuned a half-step down from standard."

-Premier Guitar; Rig Rundown with Imagine Dragons

DJ's Schecter signature model comes equipped with an EMG 81 bridge pickup and a Sustainiac in the neck position.

Installed in Moctar's American Professional Stratocaster, as stated by producer Mikey Coltun in this May 28, 2024 Guitar World interview. It can be seen in an included image of Moctar with the guitar at Coachella 2024, taken by Frazer Harrison.

What can you tell us about the guitars Mdou used on Funeral For Justice?

“Mdou used his American Professional series left-handed white Strat. We got this in 2018. It’s a newer American-made Strat with Lollar pickups and a Sustainiac pickup at the neck. He uses D’Addario NYXL 10s and doesn’t like the sound of new strings. I think the ones that were on the guitar for Funeral For Justice were two years old.”