With the EXP Rear Vertical Rail (RVR) you can easily convert your MK1
EXP-556 Pistol to an SBR by adding a stock kit, or make it a more
versatile firearm by adding a folding or fixed pistol brace. The
standard picatinny rear vertical rail also features a QD sling mount
socket to easily attach a one or two point QD sling swivel to.
assembly is extremely simple, we recommend using a competent gunsmith
for ANY firearm modification. Altering your EXP firearm may void the
warranty of certain parts if damage occurs during installation or due to
any modification made by the end user.
The EXP Rear Vertical Rail is proudly MADE IN THE USA by hard working American men and women.
Note: Only compatible with MK1