Anyone here into firearms?

tvfreakazoid · 01-21-2013, 02:42 AM

I know this has been talked about like a billions of times but here goes.

So we know there are piston and DI ar15 rifles. They both have a metal rod that pushes the bolt back right?

One of the differences is that most of the gases escapes at the front or the barrel area on a piston rifle and most of the gases goes in the lower rec area on a DI ar.

So why does these companies has to make a proprietary bolt? Couldn't they use the same bolt design? I don't know what that part is called that's on top of the bolt where the rod pushes the bolt back. Please school me on this.

BlackZeda · 01-21-2013, 08:35 AM

Quote:

Originally Posted by tvfreakazoid

So we know there are piston and DI ar15 rifles. They both have a metal rod that pushes the bolt back right?

You are mistaken...The DI has a gas tube that couples with a gas key which directs the gas into the rest of the bolt carrier group. The gas piston system utilizes the push rod which will mechanically move the BCG back into the buffer. The BCGs necessarily have to be different.

Hope that helps!

MacCool · 01-21-2013, 11:18 AM

Quote:

Originally Posted by BlackZeda

You are mistaken...The DI has a gas tube that couples with a gas key which directs the gas into the rest of the bolt carrier group. The gas piston system utilizes the push rod which will mechanically move the BCG back into the buffer. The BCGs necessarily have to be different.

Hope that helps!

A conventional Stoner-design AR is a true expanding gas piston gun too and not direct impingement. It's just that the piston is the bolt carrier group and there is no actuating rod. Direct impingement is something else.

tvfreakazoid · 01-22-2013, 04:53 AM

I realized i was mistaken about the DI ar.
Thanks.

Quote:

Originally Posted by BlackZeda

You are mistaken...The DI has a gas tube that couples with a gas key which directs the gas into the rest of the bolt carrier group. The gas piston system utilizes the push rod which will mechanically move the BCG back into the buffer. The BCGs necessarily have to be different.

Hope that helps!

01-21-2013, 02:42 AM	#1 (permalink)
tvfreakazoid A True Z Fanatic Join Date: Jan 2009 Location: kommie kali Posts: 1,238 Drives: 2015 Audi S5; 6spd. Rep Power: 10325	I know this has been talked about like a billions of times but here goes. So we know there are piston and DI ar15 rifles. They both have a metal rod that pushes the bolt back right? One of the differences is that most of the gases escapes at the front or the barrel area on a piston rifle and most of the gases goes in the lower rec area on a DI ar. So why does these companies has to make a proprietary bolt? Couldn't they use the same bolt design? I don't know what that part is called that's on top of the bolt where the rod pushes the bolt back. Please school me on this. __________________ Mudders milk Last edited by tvfreakazoid; 01-21-2013 at 05:48 AM.