Yesterday my snap on dealer came by like he does ever monday .The ph3050 was on promo so I finally bit the bullet and bought one. The number on the side of the gun is ph3050a, as is the description on the receipt. Later that day I was browsing through the march hot tools and noticed the air hammer on promo in the flyer was a ph3050b. Just wondering what the difference was. Paid $277.00 for it but bought the quick retainer seperate. I think my dealer gave me a good deal, But hope I didn't get stuck with new old stock?