Thanks for the photo, ShakySarge. Unfortunately, I'm still perplexed. Before posting here I had read lots of instructions elsewhere about the adjustment screw being under the cocking lever... so, that much I knew. I looked and looked and just couldn't find it, so I figured a photo of the location would solve my problem. But it hasn't. I'm attaching a photo of my gun from the same angle as your photo. I see no adjustment screw! What am I missing? Are there models of the Sumatra 2500 that lack the trigger adjustment option? Mine is a .22 carbine purchased from Pyramyd Air in April 2018. I really appreciate any help I can get to figure this out. Thanks.