Wrong bolt catch - Luth-AR Lower Receiver Parts Kit

For the most part it's a decent kit for the price with the exception of the bolt catch. The package says it's an AR10/.308 but it appears to come with an AR15 bolt catch which are not interchangeable. On 2 different builds it holds open on the last round but once I release the magazine the bolt slams in battery. I tried a different bolt and had the same issue. I swapped the catch from another AR10 and it solved the problem. I will have to buy 2 bolt catches specific to an AR10 to solve the issue. Beware.