hello everyone this is Jeff - this is part three of us
shooting ballistic glazing often called bulletproof glass --today we're going to
learn the difference between witness and attacks sides and will also try to
dispel some of the myths about compromise glass you know the parts that
are already cracked our tests are pretty informal but still we're getting a lot
of information and we learned a lot in the process of the type of glass that
were using is called laminated glass it has alternating layers of glass and a
softer plastic type material in the middle and its kind of built like a
really thick windshield this is about 30 millimeters thick in fact now this type
of glass has something called an attack side and a witness I'd the attack side
of course is this side that the bullets are going to be coming from and the
witness side is the area that you're protecting the biggest difference with
this type of glass it has on one side and polycarbonate anti small layer which
keeps the glass from blasting inside we wanted to see if there's a difference in
the level of protection if we shot it the opposite way through the witness
side
oh boy
so instead of the glass coming back at the shooter all that glass was being
blasted out the back and most of the shotgun slugs just went right through
the glass so we actually create more questions such as if we flip it around
to the attack side will be able to stop those slugs instead let him go through
and why is the anti small polycarbonate layer only on one side now this glass is
designed to stop a 44 magnum pistol round however in our first test it
actually stopped a 223 rifle round now we pushed it a little further shot with
the 308 and that one went through with no problem at least through partially
compromise glass
ok we brought the same pane of glass that we shot in test number two back out
again what we want to see this time is is there a difference between the level
of protection between the witness side and the attack side and since we have
some areas that are less compromise we want to see how effective those areas
are at stopping some of the projectiles we shot before
alright shooting the Chiappa in 199 millimeter rounds
since the only difference between the witness side in the attack site is that
layer of polycarbonate on one side does that layer add extra protection and does
it have some nefarious purpose
ok now we have flipped the glass around with the proper attack side facing the
shooter
now we can see a big difference in the damage to the glass between the tax ID
and the witness side the front sides all broken up with the backsides nice and
smooth
the bullet is much more defeated shooting in this orientation at the dgs
12 in high brass so it's a little hotter than last time I was the first one we
shot last time so we'll see how it does again wow wow that really moved
Wow now we can see how much glasses being ejected out words if the shooter
who is probably five feet away which is a realistic scenario is getting the
glass blown in his face and breathing glass dust that's probably going to
incapacitate him i believe that might be the reason why they don't have the anti
spalling coating on both sides now despite hitting a compromise
crackberry the glass with a slug which is above the rating of the glass it's
still totally destroyed this lug that's the back end of the slug they were
looking at right there
get a closer look at mono lit 28 it's a steal lot being slug me by D do play
factory load even three quick okay thats a hot load now one out steal slug you
think that things really hard it's going to go through that glass with no problem
if you remember test number two the slug had no problem going through the glass
when we shot it through the witness side now if you look close you can see that
the steel slug is coming back towards the camera a little bit
that's the one yeah which means around probably ok now the moment of truth here
we just gonna yeah that's the one
it's got to be inside there but it stopped it to little America bold right
here that's amazing less of a bulge in the last one huge difference just enough
but you know unit with the attack side towards the shooter perfectly some of
them yeah
fantan it that was very compromised glass too i found this about 15 years 25
yards away deformed chunk of Steel on the ground hit the glass of bounds back
out here let's face it glass is very hard and bring the key Special Forces
it's designed to be a steel penetrator for you know getting into engine has got
to attach wadding there will be a nurse interesting we haven't shot any
Bernanke's yet representing germany i don't know these are made in Germany but
that's where they were invented
ok you gonna shoot it right in this area and it's by all standards pretty
compromise just getting this little area here that 40 pounds of glass ladies and
gentleman that had recoil like a 3-inch magnum one and three-eighths ounces or
40 grams going 1400 + $OPERAND ft/s kicks like a mule
sorry about that Greg okay well that was compromised but still so is the other
glass there and where the last two main littles nice little smooth bulges that
special forces around melted right through
that's a nasty around law enforcement only those folks like you have to try
that one on steel actual yeah now the area they hit you can't even see through
anymore lots of cracks and crazes so how this slug with work on a brand-new piece
of glass
we can only guess
ok now we're going to just shoot it with 10 rounds of nine-millimeter and see
what actually comes through
we're really compromise now
that was his ball ammo and you gotta last time i did they put the whole my
finger mostly just the jacket leftover I don't know it looks pretty good out here
that looks like something i don't--that's a new hole that is a nine
millimeter hole i think that's a new hole
yeah that made it through or not you get a little bit back here
this one looks like it's made it through most of these however are just little
dimples
yeah so the compromise glass at least in its a better better position still
stopped crazy hard even though is compromised so your standard Winchester
one ounce two and three-quarter inch to sleep anytime
now you can see that the area where the slug hit look like a 9-millimeter it
already hit that area so it was very very compromised in that spot now at
this point the glasses so beat up that how this love would actually behave
shooting at the attack side with a new piece of glass is anyone's guess
so he picked up area that was compromised but it was still in it if we
went through and I don't think it's as good as that this is like a yeah this is
going through with some Authority this one just went through with that
yeah let me through 40 cal Winchester Ranger SXT eternity grain my duty am on
my duty pistol
which ones you think are that well it's tough to tell but some of them made it
through some of them found some weak spots in that compromise glass and some
of them are still just bulges here wow so even 40 caliber which is known for
barrier penetration did not make it through compromised soft glass get our
deposit back on that yeah only in Hawaii michigan and ohio five cents if you look
inside this hole here you can also see there's a huge air gap now inside of
this it just knocked all the glass out of there yeah down here
oh yeah it's like down there there's a little gap in his glass sandwich now
that we're everything this phone yeah i think i think the glasses
it's about had it lots of lots of jacket get your money's worth is it must be 42
use some of that youtube money another teaching her daughter piece of glass
ya gotta use a news piece of glass free shot with you there's a 40 caliber round
that's right you're gonna brand-new 6 by sentence piece of glass for every bullet
yeah it has to be in the frame get a frame it got to cut into smaller pieces
will you know the p-site that big spend another couple thousand dollars cutting
a glass and for those of you who didn't read the comments it cost two hundred
dollars just to slice that one big pain into four pieces $200 it's slicing this
thing into smaller pieces would run thousands of dollars just for the
cutting work if not so what do we learn here there's a big difference in the
level of protection between the attack site and the witness side despite the
glass being damaged it still exceeded the level of protection it was rated for
now
compromise is definitely relative to the location of where the glass is damaged
for example if you shot a spitball at
this area it would go right through it even though we have some light cracks it
will still stop some projectiles that are even above its ul rating and finally
if the glasses pulverize all the way through the pane of glass the level of
protection has dropped so much it may or may not stop a even at 22
I hope you enjoyed this video thanks for watching