Spikes Tactical option Q's

[Ditch-Tiger]

I went to order a couple of lowers today and Spikes added an option w/o a clear discription of what the option is.

Anybody know what "PBE group engraving" is???

http://http://www.spikestactical.com/new/z/st15-stripped-rifle-lower-with-safesemiauto-bullet-markings-p-52.html

Bottom of the page.

Thanks in advance.

 

[DoubleTapDrew]

I think it's to get the pbe logo on it according to my google-fu