AR buffer tubes? SBA3 tube or carbine?

kymasabe · November 2, 2019, 03:55 PM

I'm slowly accumulating parts for my latest AR build, and am building a pistol for the first time. I've decided on the SBA3 brace, and I see it comes with a 5 position buffer tube, while I'm pretty sure the tubes I've used in my past builds were 6 position.
My question is....is the SBA3 tube the same length with fewer positions, or a shorter tube?

DnPRK · November 3, 2019, 12:22 AM

SBA3 is shorter than a carbine tube and requires an SBA3 compatible buffer and spring to properly cycle. Using the SBA3 stuff is insurance against being accused of building a short barrelled rifle.

November 2, 2019, 03:55 PM	#1
kymasabe Senior Member Join Date: June 10, 2005 Location: SW Florida Posts: 2,747	AR buffer tubes? SBA3 tube or carbine? I'm slowly accumulating parts for my latest AR build, and am building a pistol for the first time. I've decided on the SBA3 brace, and I see it comes with a 5 position buffer tube, while I'm pretty sure the tubes I've used in my past builds were 6 position. My question is....is the SBA3 tube the same length with fewer positions, or a shorter tube? __________________ God's creatures big and small, eat them one, eat them all.

November 3, 2019, 12:22 AM	#2
DnPRK Senior Member Join Date: August 24, 2001 Location: LC, Ca Posts: 1,917	SBA3 is shorter than a carbine tube and requires an SBA3 compatible buffer and spring to properly cycle. Using the SBA3 stuff is insurance against being accused of building a short barrelled rifle.