Originally Posted by Kwesi
I was originally going with the Sparrow until a very knowledgeable friend advised me to go with the Spectre II. He was my SOT that had both in stock. IIRC there were a few reasons:
1. The o-ring and different baffles
2. It is also rated for the 5.7x28mm which I have (Sparrow might be the same)
3. It is full auto rated for .22LR which I shoot
I think you have that backwards. SparrowSS has o ring, and is full auto and 5.7 rated. I'm on month 6 of my wait...