"Kah-Pow" PPD (Personal Protective Device) Powerhead

PPD (Personal Protective Device) for spearfishing.  Fits on 5/16" shafts.  See photos for details.  AKA Powerhead.

357 or 038 rounds will work/fit.

Speargun mounted clips also available.

https://flippersdiving.com/products/ppd-personal-protective-device?_pos=1&_sid=b6c14b6f7&_ss=r