S&W 22A, Swap to longer barrel?

[Tri750]

My old trusty 22A has a 4.5" barrel and while looking online, I found a 7.0 " barrel.
Does anyone know of this is a drop in swap? The mounting pin/lug looks identical.
Thanks in advance.

[Tri750]

Yup!
Found a new old stock 7" on Gunbroker for 100.00
Dropped right on.

[BSlacker]

I have both barrels. It is a drop in. Easy.