Sig is the U.S. distributor for Irvine, and they do sell directly from their website at full retail. But lots of other places in the U.S. sell them, and most cheaper. I just bought an Irvine .53 from Quantum Models. $129.99, plus free shipping since it's over $100. I had it in two days. Can't beat that. I put it into my SE, and I agree. A very nice combination. Mine's not broken in yet, but started on the first flip out of the box, and so far is running great.