silicosys4
Member
- Joined
- Jun 29, 2012
- Messages
- 3,710
Here is a photo comparison of some of the engineering that went into the SFAR.
I am not an engineer, I do not claim to have knowledge of the changes Ruger made other than the obvious, but from the photographs you can see that Ruger did some interesting things.
Here is a top down, SFAR in the middle, Palmetto PA10 on the left, AR15 on the right. The differences become immediately obvious.
comparing the SFAR to the AR15 The SFAR receiver is significantly shorter. You can see the SFAR receiver really does have some clever engineering to keep the overall length similar to the AR15. Whatever extra length the longer magazine well requires is compensated for by the reduction in space behind the trigger group.
Comparing the SFAR to the PA10.
You can see just how much size and weight is reduced in the SFAR design.
When you compare the size of the bolts, here is where things get really...interesting.
PA10 on the left, SFAR in the middle, AR15 on the right.
The bolt itself. AR15 on the left, SFAR in the middle, PA10 on the right.
Approximate Bolt head diameter AR15
Approximate SFAR bolt head diameter
Approximate PA10 bolt head diameter
So there you go. Some of the physical differences between the SFAR and its peers that makes the size and weight of the SFAR possible.
I am not an engineer, I do not claim to have knowledge of the changes Ruger made other than the obvious, but from the photographs you can see that Ruger did some interesting things.
Here is a top down, SFAR in the middle, Palmetto PA10 on the left, AR15 on the right. The differences become immediately obvious.
comparing the SFAR to the AR15 The SFAR receiver is significantly shorter. You can see the SFAR receiver really does have some clever engineering to keep the overall length similar to the AR15. Whatever extra length the longer magazine well requires is compensated for by the reduction in space behind the trigger group.
Comparing the SFAR to the PA10.
You can see just how much size and weight is reduced in the SFAR design.
When you compare the size of the bolts, here is where things get really...interesting.
PA10 on the left, SFAR in the middle, AR15 on the right.
The bolt itself. AR15 on the left, SFAR in the middle, PA10 on the right.
Approximate Bolt head diameter AR15
Approximate SFAR bolt head diameter
Approximate PA10 bolt head diameter
So there you go. Some of the physical differences between the SFAR and its peers that makes the size and weight of the SFAR possible.