What do I need to make an A5-ish stock for my 20"?

I have an A5 on my SR-15, and I would really like to ditch the A2 stock on my musket in favor of a collapsible type. There are no more A5 components to be had anywhere that I can find.

How can I recreate this kit with standard parts? Will a heavier buffer and rifle spring work? Which weight?

No, a rifle spring and a carbine length buffer will not work. The A-5 tube is longer than a carbine tube, the A-5 buffer is longer than a carbine buffer. The combination allows the use of the rifle length spring.

Rogtac has the A5 buffer tube in stock. You just need to find a buffer and spring and you are good to go. I back ordered an A5 buffer from DSG Arms and I had it in two weeks.

What I did was an A5 tube and rifle spring from BCM.

Then the A5 buffer from DSG arms. I think the h2 or h3 one.

But akdoug is right, the tube and buffer are unique to the kit.

When using the CARBEAN RE, the closest you can come to an A5 is a USGI carbine spring and an H2 buffer.

Don’t cross mojinate springs or any other component between the various systems… except for the A5’s rifle spring.

Thank you, and good day. :mad:

The A5 uses a specific buffer with a rifle spring. You will not be able to recreate it out of other parts without the A5 buffer. Don’t mix and match parts. Carbine buffers belong only in carbine tubes with carbine springs.

Best bet is to try and get the buffer tube, spring, and buffer from different locations if they are in stock.

I was aware of the proprietary parts. I was looking for a way to put a collapsible stock on my 20", but it doesn’t necessarily have to be an A5-type setup. Is there a way to do it without going the A5 route?

Simply install a carbine RE, spring and buffer

For some reason, I thought that carbine tube and rifle gas system caused issues with short-stroking.

Nope, should be fine.

Regular carbine tube, mil-spec carbine spring, and H2 buffer should do just fine for you.

Use a blue Springco spring and an H3 buffer.

The UBR stock uses a casrbine length RE and works just fine with a 20" barrel


I will concur with the previous posts. I used a BCM with a 20" barrel and carbine tube and H2 buffer. Ran great. It had a collapsible stock, but I wanted to go to an A2 stock, so I picked up the Vltor rifle modstock, which fits right on a carbine tube.