I recently purchased a pt 111 in 9mm. So far, I like the gun for what it is for, concealed carry. The only issue that I need to address is that it shoots about 4 inches low at 7 yards. Is there a sight I can purchase, either front or rear, so I can correct the elevation issue? Have tried several loads, and found that blazer 115 grain solids shoot the best, with all shots touching at 21 feet, just that group is 4 inches low. All brands of ammo shoot to the same point of impact. Thanks guys. Jeff in San Antonio.