V4 DEFENDER OPTIC MOUNTING PLATE FOR GLOCK MOS The weakest link in your red-dot-equipped handgun is the mounting plate between the optic and your pistol slide. If this critical component isn't designed correctly, then your entire system won't work as designed. The C&H Precision V4 Defender series optic mounting plates are designed to address the critical flaws encountered in most plates, and it will ensure that your gun performs as designed. Each C&H Precision V4 Defender Optic Mounting Plate designed for use on GlockA(R)pistols improves two key elements of optics mounting: hardware and optic protection. The plates feature the company's patent-pending T-Nuts and Mfg: C&H Precision Weapons