I built a 10.5 pistol and running a foam on a BCM pistol tube.

I am made a change to my simple pistol...

ALG blem 10" rail

my additional wants...
Lightweight red dot
SBM4 stock

it appears the SBM4 stock will work with my BCM 1.2" pistol tube.

I hope to find a clean used one to save a few dollars.

before I make this jump....I want to make sure I know all the quirks with it.

Any cons that you are aware about?

is there a prefer spacer just in case a stuck case impact to the back of the tube/stock is required?

thanks