The MS-05L Zaku I Sniper is a variant of the MS-05B Zaku I. It first appeared as a part of Harmony of Gundam variations design by Hajime Katoki, but was also featured in Mobile Suit Gundam Unicorn and Model Suit Gunpla Builders Beginning G.

A retrofitted version of the MS-05 Zaku I, the MS-05L Zaku I Sniper Type's primary weapon was a beam sniper rifle, which was powered by a backpack-mounted sub-generator. Its head unit was fitted with the same type of composite monoeye as the MS-06E Zaku Reconnaissance Type, granting it the necessary sensor range for long-range sniping. It was also equipped with a pair of head-mounted Vulcan guns for defense. A foldable knee pad was installed in its right knee, which can deploy to stabilize the mobile suit during sniping missions. Essentially, the Zaku I Sniper Type was a self-propelled long-range mega particle cannon turret.