SILENCER ADAPTER for 15mm barrels

Tried anyone this http://www.ebay.com/itm/SILENCER-ADAPTER-1-2-UNF-for-15mm-barrels-/300554982939?pt=UK_SportingGoods_Hunting_ShootingSports_ET&hash=item45fa79161b for cricket barrel? I´m thinking buy this adapter and use moderator from my HW100 that is superb. I do not know if body of that adapter is long enough for secure grip of two small grub screw…???