Crusader Arms Crypto
- Thread starter MilsurpLover
- Start date
Gunnerlove
CGN Ultra frequent flyer
- Location
- Vancouver Island
Why not prove you are right. You made the claims.
But it is just claims and BS.
I really question your motives.
One current production firearm that uses a longitudinal pin for assembly at the front of the lower frame is the very popular Browning BL22.
The lower frame, which carries the firing mechanism with hammer, lever, and buttstock is a non-ferrous casting. Probably Zamak or similar zinc based diecasting alloy. The receiver with boltway and barrel is steel. They are connected with a single pin at the front and a takedown screw passing through at the rear.
The pin is splined, and pressed into the casting. I know of one incident where the pin separated from its socket in the lower. The rifle had been used, abused, rode hard and put away wet. In this case, the casting broke. I repaired it by setting the pin in place with JB Weld. The rifle wasn't brought back to the shop, remained in service.
I do not believe that there is a design problem with use of these pins in the case of the Crypto. It is a clever system for producing a rifle that meets the needs of competitive shooters, hunters and sportsmen. The fact that neither an AR auto sear nor a STANAG magazine are compatible with the Crypto is evidence of thoughtful design.
The lower frame, which carries the firing mechanism with hammer, lever, and buttstock is a non-ferrous casting. Probably Zamak or similar zinc based diecasting alloy. The receiver with boltway and barrel is steel. They are connected with a single pin at the front and a takedown screw passing through at the rear.
The pin is splined, and pressed into the casting. I know of one incident where the pin separated from its socket in the lower. The rifle had been used, abused, rode hard and put away wet. In this case, the casting broke. I repaired it by setting the pin in place with JB Weld. The rifle wasn't brought back to the shop, remained in service.
I do not believe that there is a design problem with use of these pins in the case of the Crypto. It is a clever system for producing a rifle that meets the needs of competitive shooters, hunters and sportsmen. The fact that neither an AR auto sear nor a STANAG magazine are compatible with the Crypto is evidence of thoughtful design.
- Location
- Nova Scotia
Even if the pins are loose. The upper is still secured by a rear take down pin, then the magwell area that the upper reciever sits against becomes the recoil lug. Oh yeah and then the upper to rear of the lower. The front pins are just alignment guides.
- Location
- Nova Scotia
They don't. It utilize the same load bearing as the AR15. Front of the upper to front of the mag well. The rear take down pin. That tab also sits in a slot on the lower. Then you got the upper against the buffer tube area on the lower.
Pins are just alignment pins. To keep the front of the upper from going side to side.
- Location
- Nova Scotia
On a AR180 they used 2 thin spring guide rods on a plate with a nub. that locked into a hole on the polymer lower reciever. That kept the lower closed and aligned. So I don't see how this design is any weaker. Simply someone that doesn't know AR15 or 180 design, trying to grasp straws to being wrong.
Well it seems that it is universally accepted as a fact that front pins have no load up and down. It also seems to be universally accepted that there is no difference between a cross pin side to side and a pin along the receiver and there is no difference between a pin moving freely inside holes and a pin fixed in place by one end. All this have nothing to do with what kind of stress is applied where and to what part of the assembly has to be in what tolerances. Ok fine. All I can do is stand in awe.
- Location
- Nova Scotia
AR180B used metal guide into polymer. Just don't got cracking it off trees or drop it. But I don't see how it's gonna be a failure point. As it's no different than front take down pin on an AR15.
Gunnerlove
CGN Ultra frequent flyer
- Location
- Vancouver Island
You could go do some dry fire. Go for a run. Be productive. You are adding nothing here.
See you at NSCC 2025.
Gunnerlove
CGN Ultra frequent flyer
- Location
- Vancouver Island
I will bring ammo. You can bring whatever welded carrier thing you feel is not flawed to its core. 
Two press fit pins in single shear loaded longitudinally is better than one slip fit pin in double shear loaded laterally, don't worry that fulcrum with 20 inches of barrel hanging off it will be fine.
Like an AR15, don't swing this gun around without the rear takedown pin installed.
