HK Mark 23 and a Laser/Light Combo - Saga | HKPRO Forums
The IRL version of Snake's gun, the HK Mk23 SOCOM : r/metalgearsolid
Lobos Industries Mark 23 rail Adapter. I did not see this laser/light combo on the confirmed fit list, but here it is. It does fit without any troubles : r/HecklerKoch
Tokyo Marui MK23 Airsoft SOCOM Fixed Slide Full Set Green Gas Pistol | RedWolf
HK Mark 23 (SOCOM) Picatinny Rail Adapter (Tac-Laser Model)
One of the first, and one of the last. Two HK Mark 23s, the subtle differences between them and a quick overview of the Insight LAM (also bonus current project). : r/guns
GG&G Picatinny Rail Adapter HK MK 23 Aluminum Matte
Review: H&K MARK23 The Civilian Version MK23 SOCOM -The Firearm Blog