The Full Auto FN Five-SeveN with the @CMMG extension.

Testing out the CMMG extension. This extension was made for the gen 1 FN FNH Five-SeveN pistols. I had to modify it to fit the MK2 pistol. @Jay The Shooter #fullauto #fn57 #sot #fiveseven #fnhusa #pewpewlife #pewpew #gunsofyoutube #gunchannel #guntuber #gunsmith #shooting #gun