Everything sits more than snug to be honest, although have added the lanyard, but it wasn't needed, just a bit of over engineering to be safe!
It was the FMA one:- https://www.ebay.co.uk/itm/FMA-Fast-Helmet-Lanyard-For-Fast-PJ-BJ-type-Helmet-airsoft-paintball/291671119822?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 Mike