Fab Def Ar15/m4 Buttstock Blk Spring just a simple design that

just a simple design that includes soft keys

Integrated color agents provide added luster in sunlight

Outputs NMEA 0183 and NMEA 2000 data simultanously

rubberized construction w/built in top grip handle

It uses built-in WiFi connection to access the internet cloud or an optional cellular connection

Fab Def Ar15/m4 Buttstock Blk Spring just a simple design thatThe GL Core buttstock features an integrated cheek weld, ergonomic buttpad and an interchanging buffer tube adapter that allows it to fit on either Mil Spec and Commercial buffer tubes. Comes with two integrated QD sling swivel sockets. Features : Black finish Ergonomically shaped rubberized butt pad Interchangeable buffer tube adapters Inversed positioning lever No protruding parts