Building my first AR-15

What seems to be the most preferred ButtStock? Collapsible or Fixed?

Any pros- or cons?


Thanks in advance!

Depends on if it is a precision rifle what it will be used for etc... Basically it's personal preference.

A collapsible stock allows you to change stock lengths to accommodate shooters of different sizes.  

A fixed stock is great for producing a solid, repeatable cheekweld, which is one of the things you need when precision shooting through magnified optics or irons.  

A fixed stock will use a standard length buffer tube, and standard length and weight buffer.  This is the buffer system that the rifle length gas system was designed around.

A collapsible stock will use a shorter carbine buffer tube and the shorter carbine buffer.  It was designed for the carbine length gas system and is generally most popular on carbine and midlength gas system guns.

Not even close.... collapsible by a wide margin.

Look at SOPMOD and VLTOR stocks.  They are my preference for almost all applications.        
 

I have four lowers

Two CavArms MkII
One Stag telestock
One AR rifle stock

To me, one is no better then the other.  I decide what I need an AR to do on a given day, grab the right lower and upper and go shooting.

Usually I pick the CavArms MkII with the match trigger and whatever upper I need.