Adam, I recently pursued a complicated sleeve on that 'air conditioned' Boss Hammergun I bought a couple of months ago against hoJo's best dissuasions. Steve Bertram (SKB) sends barrels to John Foster in batches to save shipping expense.

All seemed a go on the deal to me until John decided my gun was not a viable candidate. Your best bet might be to call Steve and get a price after he vets your barrels and communicates with Mr. Foster.

Good Luck...Geo