If you know you know. Modular back straps and side grip panels, original removable FCU and patent. Steyr sued sig over the patent, won, and sig had to change the design and layout of their plagiarized FCU. Trapezoidal sights. Extremely low bore axis. Fit tight like a custom 2011 but silky butter smoothe. Pretty nice IWB holster included as well. 2x-17rd magazines included.

Asking 400
352-405-1665


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Mcx Bren Glock sig staccato scar ACR BRN Mp5 Hk 300BLK ACOG EOTECH trijicon GBRS LPVO beretta B&T