Crusader Arms Crypto

Two mags, plastic midsection.
If someone wanted to monopod the rifle, a cap would be needed to protect the bottom magazine.
 

We took the time scour the comment section of our previous CRYPTO video that is over 200,000 views and passed them along to the Owner of Crusader Arms Steve Goulet for him to answer your questions directly from the source.
 
I've looked at the crypto at the taccom. Two things:

1) Front 2 pins are steel pegs press fitted into aluminum and I've been told they are loctited in place. I'm very skeptical these will hold over time. Everything tells me they will break loose over time.

2) These magazines are pretty odd. Lips are too thin, all polymer and do not look that strong. Magazine is in fact one single piece with top, bottom and middle section. Mid portion screams bad 3d printing on itself. And you cannot decouple top from the bottom. Any time it drops on a ground it will hit the lips on one side.


Overall I've decided to pass this time.
 
owlowl said:
I've looked at the crypto at the taccom. Two things:

1) Front 2 pins are steel pegs press fitted into aluminum and I've been told they are loctited in place. I'm very skeptical these will hold over time. Everything tells me they will break loose over time.
Click to expand...
Why? No force is applied at them, those pins just hold upper from sliding left-right from lower. And you still get your rear pin. I actually liked the whole idea. I don't care about mags. Mags are FU to the current stupid laws.
 
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Horilka said:
Why? No force is applied at them, those pins just hold upper from sliding left-right from lower. And you still get your rear pin. I actually liked the whole idea. I don't care about mags. Mags are FU to the current stupid laws.
Click to expand...

The upper is pivoting against the lower around back cross pin, yes? When you remove the rear pin will it pivot open? yes. Any time there is a force up or down between upper and lower there is also a force applied to the front pins. If you were to remove the front pins the rifle would flop around and open up. If it does not flop around and open up, it means that front pins are transferring a load between upper and lower and it means there is a force applied to them each time you apply a up and down.

For instance, if you hold crypt with one hand by the pistol grip and the front is handing free, upper would want to fall down and it will load rear pin A, which would give a little slack and the front pins B will receive torque.

1725682539831.png

Moreover, there are 2 pins which will give differently and this will make it worse. And there is different loading on each when you twist upper and lower from side to side.

If anything join B should be the pivot against longest shoulder of force L, but it is the opposite. It it is all applying force on pins which are fixed into lower by like 3mm and a glue.
 
I swear in one of the first videos of this rifle posted on YouTube, buddy only had one of the pins in the lower receiver. May prove as evidence to your point. May be wrong..
 
The rifle has a violent wave going through with every shot, upper and lower are dancing around each other:


You are torqueing steel pins in a 6066 aluminum holes, and the shortest ends are press fit and glued in:

1725685425223.png

I don't even want to think about thermal stress and winter/summer because steel and 6066 are not expanding at the same rate with temp.
 
I watched the video of the AR-15 type carbine. Very interesting slow motion. The barrel really vibrates. I could not see the upper and lower dancing around each other.
I don't think an AR type upper and lower pivot around the rear take-down pin. AR type uppers and lowers pivot around the forward pin. Push out the takedown pin on a Crypto, and the the upper doesn't pivot. It is removed using a longitudinal linear motion.
The dowel pins are set into the Crypto lower 3MM? 0.118". How did you confirm that dimension?
Are the dowel pins a push fit, secured with Loctite, or a pressed interference fit? Again, how did you confirm that the dowels are glued in?
 
owlowl said:
The rifle has a violent wave going through with every shot, upper and lower are dancing around each other:


You are torqueing steel pins in a 6066 aluminum holes, and the shortest ends are press fit and glued in:

View attachment 815253

I don't even want to think about thermal stress and winter/summer because steel and 6066 are not expanding at the same rate with temp.
Click to expand...
Thermal stress? That will be an insignificant variable on an AR15 receiver.

Maybe an aluminum engine with steel parts - something we see in most vehicles.

Don’t forget an ar15 has numerous steel to aluminum mating surfaces (rear receiver extension to buffer tube, front barrel nut to receiver, etc.

The mating of the upper and lower looks to me to be STRONGER then a standard AR15.

Are we just looking for things to nitpick?

As a former machinist with an automotive industry background, I see the most likely problems would be/ could be sloppy geometry Issues. If those are solved, then magazine issues.

I don’t see any inherent weakness in that receiver design.

The rest of it? - it’s all speculation until we get high round count rifles in the wild.

From my visual - this could be a winner.
 
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