UNDER GREN ATTACHMENT | REQUIRES SMALL INSTALLATION
*Does NOT fit the M16A1.  Only the AR15 model with front sight.
You asked, Sarge listened. One of a kind M203 under attachment that fits all GoatGuns AR models
Comes with screw and screw driver. Must remove sling handle and bottom rail guard to fit. 
5" in length (12.7cm)
1.5" in height (3.8cm)
Comes with 1 dummy gren round which can load & unload
Does not fit the short barrel system
100% die cast metal
Installation Instructions:
When installing - you must remove sling handle on front of barrel. You then need to be forceful when pushing the M203 Gren attachment onto barrel along with when putting railing back onto barrel.  Add gren attachment first and then railing after.  Does not fit the M16A1.