Buffer tube length

[Hopar]

My 15 has 20" barrel with the gas port about 16.5" away.
Does it need a rifle buffer tube or the carbine tube?

TIA

 

[Cascade Hemi]

Yes

 

[Hopar]

Yes

I assume you meant both tubes will work.

 

[6.5SH]

Use the tube length to match the buffer type you are using. Either can work.
The decision is likely more based around your choice of stock.

 

[SBRSarge]

Are you asking about the thin gas tube on the barrel, or the receiver extension tube on which the butt stock slides?


Here are some links that might help.

AR15 Gas Tube Guide

Trying to figure out which gas tube length you need for your new AR15 build? We got you.

www.80percentarms.com

 

[Hopar]

Are you asking about the thin gas tube on the barrel, or the receiver extension tube on which the butt stock slides?


Here are some links that might help.

AR15 Gas Tube Guide

Trying to figure out which gas tube length you need for your new AR15 build? We got you.

www.80percentarms.com

Receiver extension.

I will watch. Thank you

 

[Hopar]

Use the tube length to match the buffer type you are using. Either can work.
The decision is likely more based around your choice of stock.

So as long as the bolt clears the bolt catch, I should be OK?

 

[6.5SH]

Not quite. If you used a carbine length buffer in a rifle length extension you'd need to use a spacer to prevent over travel, otherwise you would damage the lower receiver.

If you are using a non-adjustable stock such as an A1 or A2 style you'd use a rifle length extension. Normally you'd use a rifle length buffer and spring, but a spacer, carbine buffer and carbine spring can also be used.

 

[Hopar]

Not quite. If you used a carbine length buffer in a rifle length extension you'd need to use a spacer to prevent over travel, otherwise you would damage the lower receiver.

If you are using a non-adjustable stock such as an A1 or A2 style you'd use a rifle length extension. Normally you'd use a rifle length buffer and spring, but a spacer, carbine buffer and carbine spring can also be used.

I have the carbine length tube with a fixed stock (I am in Comifonia)

 

[6.5SH]

I have the carbine length tube with a fixed stock (I am in Comifonia)

If you have a carbine tube use a carbine buffer and spring.

 

[Cascade Hemi]

I assume you meant both tubes will work.

Carrier stroke length doesn't change no matter how long your barrel, gas system, or receiver extension. Pick a buffer tube based on the stock you want and use the appropriate buffer and spring.

 

[Hopar]

Carrier stroke length doesn't change no matter how long your barrel, gas system, or receiver extension. Pick a buffer tube based on the stock you want and use the appropriate buffer and spring.

Got it.

Thanks.