AEA / BinTac Defender 2.0 Info, Q&A, Tip, Tricks & Modifications Thread

I hit up Bin Lu about a month ago seeing if I could get a bundle deal on a Defender 2.0 ... I wanted both 357 and 457 barrels, extra air cartridges, extra burst discs.
Here's what I received. Defender 2.0 with 3x 357 barrels, 3x 457 barrels, 6 air cartridges and a bunch of extra burst discs.

I have shot this about 15 times so far, about half an half with each barrel. I got .356 sized 120g slugs and .456 sized 155g slugs from Texoma Precision Ammo specifically for the Defender 2.

Now, I have not had any misfires, double fires, or issues some on YouTube have shown. I actually think a couple of these people doing videos were intentionally sloppy and perhaps trying to give it a bad name. Because common sense comes into play when operating this. And I have tested cartridges for 10+ days and they haven't lost a sip of air in that time.

It goes boom every time. Complaints? Yes. The trigger sucks, some people might even need two fingers. Maybe that's a good thing as well, because it's probably child-proof in that aspect. It might break in a bit after use, and you can break it in without the gun having carts loaded. That seemed to help. Also, it slightly underperforms (on average) the 45-50 FPE numbers it's advertised at. More like anywhere between 30 and 70 FPE but probably closer to 35-40 FPE on average. Still a bit more punch than the original model. I have not yet isolated the source of the variance, which is my next goal.

It certainly does pack a close range punch but probably difficult to hit anything beyond 20 yards and certainly less if it's a small target.

For now I'm keeping it, since these carts do seem to hold a fill long enough that it's not a big deal (and you can top them off pretty easily with a couple hand pumps even, if it did start to leak. You can tell by the burst discs, if they have a bulge and how pronounced, how much air it's got... roughly of course).

A fascinating device that I'd like to optimize. This 2.0 model doesn't have an arrow kit, but maybe the old arrow kit works on these bigger cartridges. I think that would make it an even better "defender".

Defender-2.jpg
 
  • Like
Reactions: SniPeralez
@silvershooter589 Hey<
I also have the AEA defender v2 with laser, for some reason the .454 slugs hit my target perpendicular, I posted a photo to illustrate this? Any idea what could be the reason? Like the slug is tilted 90 degrees along the direction of motion. Also sometimes the gun doesnt fire, Like I hear a sissing sound and it doesnt fire properly. In the third picture you can see the burstdisks when the gun doesnt fire correctly. I use a diving bottle which is filled at 300 bar.
IMG_0397.jpg



IMG_0479.jpg
IMG_0480.jpg
 
@silvershooter589 Hey<
I also have the AEA defender v2 with laser, for some reason the .454 slugs hit my target perpendicular, I posted a photo to illustrate this? Any idea what could be the reason? Like the slug is tilted 90 degrees along the direction of motion. Also sometimes the gun doesnt fire, Like I hear a sissing sound and it doesnt fire properly. In the third picture you can see the burstdisks when the gun doesnt fire correctly. I use a diving bottle which is filled at 300 bar. View attachment 535399


View attachment 535397View attachment 535398

Perpendicular means too low velocity.

You need to use the lightest .45 caliber ammo you can find with these. Like 150 grain to 170 grain max.

As for the hissing, most likely it's because your carts are losing air pressure.

I have my gun sitting unused for about 8 months now and I can tell it's got full air pressure and ready to go. Yeah, they will stay full for a whole year or more. But you absolutely must use a light touch of silicone oil on the burst disc and o-ring that touches it. This will make a perfect seal and you won't have these problems.

A misfire can still happen but 90% less likely. In that case it's more likely the firing pin not punching perfectly.

The design is unfortunately not perfect and even with proper operation there can be misfires, but they should be pretty rare. And you can see if your gun still has air by checking the bulge on the burst disc (crack open the gun and look at the back of the cartridge before you fire, if it's been a while). If the burst disc is still bulging, you're going to have full power regardless of how long it's been sitting.
 
  • Like
Reactions: rootdude
Perpendicular means too low velocity.

You need to use the lightest .45 caliber ammo you can find with these. Like 150 grain to 170 grain max.

As for the hissing, most likely it's because your carts are losing air pressure.

I have my gun sitting unused for about 8 months now and I can tell it's got full air pressure and ready to go. Yeah, they will stay full for a whole year or more. But you absolutely must use a light touch of silicone oil on the burst disc and o-ring that touches it. This will make a perfect seal and you won't have these problems.

A misfire can still happen but 90% less likely. In that case it's more likely the firing pin not punching perfectly.

The design is unfortunately not perfect and even with proper operation there can be misfires, but they should be pretty rare. And you can see if your gun still has air by checking the bulge on the burst disc (crack open the gun and look at the back of the cartridge before you fire, if it's been a while). If the burst disc is still bulging, you're going to have full power regardless of how long it's been sitting.
Thanks. Also I have a diving bottle which is filled at 300 bar, however when I fill the cartridge of the Defender, the manometer on the bottle wont go higher then 240-250 bar even with the main valve fully open.
 
Thanks. Also I have a diving bottle which is filled at 300 bar, however when I fill the cartridge of the Defender, the manometer on the bottle wont go higher then 240-250 bar even with the main valve fully open.

That may be causing your problem. If there is not enough pressure (4500-5000psi) then it can misfire as well.
 
And you never had a misfire? It always fires?

I've probably fired it less than 100 times, as I've found it will hold air "forever" by filling to 4800 psi and using a light touch of silicone oil on the o-ring that touches the burst disc.

Maybe two misfires overall, not counting when I was experimenting with lower pressures. But I also check to make sure the burst discs are still bulging if I haven't fired it for a while and it's been left with a charge. If the burst disc is no longer bulging, obviously it leaked and won't fire.

There could be environmental factors involved, too. For example, I haven't tried firing this is very cold temperatures, or leaving the filled cartridges out in the cold. I have no idea if that, or other factors, could impact performance.
 
I've probably fired it less than 100 times, as I've found it will hold air "forever" by filling to 4800 psi and using a light touch of silicone oil on the o-ring that touches the burst disc.

Maybe two misfires overall, not counting when I was experimenting with lower pressures. But I also check to make sure the burst discs are still bulging if I haven't fired it for a while and it's been left with a charge. If the burst disc is no longer bulging, obviously it leaked and won't fire.

There could be environmental factors involved, too. For example, I haven't tried firing this is very cold temperatures, or leaving the filled cartridges out in the cold. I have no idea if that, or other factors, could impact performance.
Also, do you use this as your main home defense weapon? Or do you also carry it. For instance, I live in the Netherlands, everyone who is 18+ can buy and own airguns/airpistols as long as they dont look to much like a real firearm(like a glock or an AR-15), but we are not allowed to carry them on the street. Only transport them unloaded/uncocked in a bag.
 
Also, do you use this as your main home defense weapon? Or do you also carry it. For instance, I live in the Netherlands, everyone who is 18+ can buy and own airguns/airpistols as long as they dont look to much like a real firearm(like a glock or an AR-15), but we are not allowed to carry them on the street. Only transport them unloaded/uncocked in a bag.

No, but this forum discourages discussion of airgun as defensive tools, so I won't elaborate beyond that. Except that I am in USA and at least where I live there are not such regulations.
 
  • Like
Reactions: rootdude