A blade outer air seal (BOAS) assembly for a gas turbine engine comprising an engine case , the assembly comprising: a BOAS comprising: a curved ceramic body having a radially inner face and a radially outer face , wherein the radially inner face and the radially outer face extend circumferentially between a first mate face and a second mate face ; a retention feature that extends from said radially outer face ; and said retention feature includes a first angled hook near the first mate face that extends at a transverse angle relative to said radially outer face and a second angled hook near the second mate face that extends at a second transverse angle relative to said radially outer face ; and wherein recessed openings extend between the radially outer face and the angled hooks ; the assembly further comprising first and second retention blocks , wherein said first and second retention blocks each include a body and a pin that extends from said body of the retention block, wherein the pin is configured to be received in an opening in the engine case to secure the retention blocks thereto and wherein the first and second retention blocks are ceramic blocks; wherein the first retention block comprises tapered arms extending at a transverse angle from said body and are received in said recessed openings such that the angled hooks of the BOAS and the tapered arms define a slidable interface (SI) for effectuating radially inboard movement of the BOAS ; and wherein the second retention block comprises tapered arms extending at a transverse angle from said body and are received in said recessed openings such that the angled hooks of the BOAS and the tapered arms define a slidable interface (SI) for effectuating radially inboard movement of the BOAS. a curved ceramic body having a radially inner face and a radially outer face , wherein the radially inner face and the radially outer face extend circumferentially between a first mate face and a second mate face ; a retention feature that extends from said radially outer face ; and said retention feature includes a first angled hook near the first mate face that extends at a transverse angle relative to said radially outer face and a second angled hook near the second mate face that extends at a second transverse angle relative to said radially outer face ; and wherein recessed openings extend between the radially outer face and the angled hooks ; the assembly further comprising first and second retention blocks , wherein said first and second retention blocks each include a body and a pin that extends from said body of the retention block, wherein the pin is configured to be received in an opening in the engine case to secure the retention blocks thereto and wherein the first and second retention blocks are ceramic blocks; wherein the first retention block comprises tapered arms extending at a transverse angle from said body and are received in said recessed openings such that the angled hooks of the BOAS and the tapered arms define a slidable interface (SI) for effectuating radially inboard movement of the BOAS ; and wherein the second retention block comprises tapered arms extending at a transverse angle from said body and are received in said recessed openings such that the angled hooks of the BOAS and the tapered arms define a slidable interface (SI) for effectuating radially inboard movement of the BOAS. <EOS>