- SIG Air M18 GBB base - CNC Aluninum ( X Carry Legion ) slide Installed - CNC Steel (16mm diameter) 5 Inch Threaded outer barrel Installed ( 14mm - ) - CNC Steel Recoil Spring Guide Rod set with 150% spring Installed - CNC Steel Adjustable Front & Real sight Installed - CNC Steel Take down Lever / Mag Release Installed - CNC Steel Skeletonized Flat Trigger Installed - P320 Carry size Polymer lower frame ( With Stippling ) x 1 - CNC Aluminum P320 Magwell x 1 - SIG M18 type Magazine + Extension Mag. Pad x 1 - Full Marking version - Flashlight ( Not included )