Buffer tube question

Technical discussions relating to specific firearms.

Buffer tube question

Postby newportri » Fri Nov 07, 2014 2:32 pm

OK, so I am building a ar-15 pistol with a 10.3" barrel (carbine length gas system) and I plan on putting a SB-15 brace on it and a KAK SUPER SIG SB-15 Pistol Buffer Tube. This buffer tube is carbine length. I have heard some good things about the Tubbs buffer springs and they say they can be used both for Rifle and Carbine gas system. However, most other buffer springs are for either Carbine or Rifle, so I was wondering if anyone had any experience with the Tubbs in a Carbine gas system?

Also, is it worth paying $40 for a buffer instead of a $10 buffer? How heavy buffer can you use with the Tubb springs?
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Re: Buffer tube question

Postby jcat » Fri Nov 07, 2014 6:08 pm

I don't see how the spring could be cross-compatible...the buffer tubes are entirely different lengths.

I bought the tube from KAK as the entire kit, spring buffer tube buffer everything. I figure if they're putting it out, they know what runs and what doesn't.

Another one you might want to look at if you can find it is the Odinworks SB-PT setup. While a little more spendy than KAK, it has some really, really cool features built into it specifically for the SB-15.
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Re: Buffer tube question

Postby newportri » Fri Nov 07, 2014 6:26 pm

I also thought that was strange, but this is what the description says:
High Performance Tubb Precision CS Flatwire Buffer Spring for AR-15 Rifles & Carbines. This Tubb Precision CS AR-15 Flatwire Buffer Spring fits both carbine and standard length stocks.

http://www.davidtubb.com/ar15-tubb-parts/ar15-bufferspring
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Re: Buffer tube question

Postby RImike » Mon Nov 10, 2014 11:19 pm

Notice is says "stocks" in there and not "buffer tubes" I wonder if some IT guy wrote this an had no clue what he was typing.

For what it's worth, they are different:

TECHNICAL MANUAL
ARMY NO. 9-1005-319-23&P
AIR FORCE TO 11W3-5-5-42

RIFLE: 11 3/4 Inches (29 85 cm) minimum to 13 1./2 inches (34 29 cm) maximum

CARBINE: 10 1/16 inches (25.56 cm) minimum to 11 1/4 inches (28.58 cm) maximum.
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Re: Buffer tube question

Postby newportri » Tue Nov 11, 2014 12:47 am

I ended up buying one of their kits that has everything so I should be all set.
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