In 2010, Real Grade (RG) was released to celebrate the 30th anniversary of Gunpla. Real Grade kits are differentiated from HG kits by a number of features previously found only in larger scale kits, including near perfect color accuracy without the use of color-correcting stickers, a full inner frame, high part counts, advanced articulation, and extensive decals. These kits have also been redesigned to appear more "realistic" by adding additional surface detail, color separation and mechanical detail. Most RG kits use a technology called the Advanced MS Joint, where the inner frame for the chest, arms, legs, and feet are prebuilt and fully articulated, requiring the other parts to be attached to it. The rubbery nature of the prebuilt parts leads to the model deteriorating in stability if too much weight is put on the prebuilt parts. Later RG kits use the more stable Advanced MS Framework that combines limited use of prebuilt parts alongside traditional inner frame technology, or use the MS Joints exclusively in lightweight areas such as accessories or weapons.