Oh yeah,and I heard from a CRPF personnel who's Patka saved him from SLR hit of the naxalites.
By the way,you didn't mention at what range and against which ammo.Any proof of you claim-because the US Marines reported significant casualty rates due to head shots from snipers in Irak and Afghanistan.Every US soldiers are equipped with PASGT kevlar helmets-the same kind of kevlar helmets used by your Special Ops guys as seen on the pictures posted by you.According to the Americans their helmets got repeated pierced by AK bullets and Dragunov rounds at regular combat ranges and as a result the US Army is now replacing them with PEO helmets using some kind of Aramid and ceramic componetnts instead of kevlar.So I can't understand how did your kevlar helmets withstood 7.62*54mm Dragunov rounds.
By the way,I just told what the manufacturer of Patkas claims in its website.Believing or not is completely upto you.
REGARDS. . . . . . . .