Rock River Match trigger-large hole or small hole?

[Stik]

I have a Rock River lower with GI internals and want to get the 2 stage match trigger for it. Already have one in my 20" SS 1in 8 twist rifle that came with that complete rifle but want to put one in the carbine i built. Can anyone tell me if the Rock River lower is considered a small hole or large hole for the trigger group? I think it would be considered small hole but want to confirm prior to ordering. Thanks in advance.
Stik

[C4IGrant]

@Stik

I have a Rock River lower with GI internals and want to get the 2 stage match trigger for it. Already have one in my 20" SS 1in 8 twist rifle that came with that complete rifle but want to put one in the carbine i built. Can anyone tell me if the Rock River lower is considered a small hole or large hole for the trigger group? I think it would be considered small hole but want to confirm prior to ordering. Thanks in advance.
Stik

It is small (.154).

C4