TGT, we are having a sale on our Lasermax products, MSRP is 449.00, I have dropped these down to 390.00. Plus, right now Laser Max is having a manufacturer rebate of 90.00 for this product. Great offer to have this drop in laser for your Gen 3 Glock for only 300.00! Email me at email@example.com if interested. Other Glock models available including your Gen 4 19 frames and Gen 4 22 frames. Rebate is simple, log onto LaserMax Home put in the information and they will send you a check!