Hi all, Haven't decided on which one to get. Stuck between the 4'' gap and the 4'' 9mm. Rented a 4'' 40 today and shot about 100 rnds through it, then about 50 rnds through a hk 40 compact usp. Was leaning towards the gap but none around to rent. Was curious if anyone has had a chance to shoot the full assortment and could give me any feed back as far as recoil comparison between the 40 and gap. Had no problems with either gun today. Was running win. 185 flats. Liked both as far as accuracy and feel. Had a couple of fliers with both, but I'm still learning.