Design Machine is holding a promotion during the month of may. Any low mount purchased will come with a free 3" picatinny side rail. We've been looking for a way to show our appreciation to our customers. Finally being caught up on our side work we were able to find the time to produce an extra portion of side rails, which we would like to reward our loyal customers with. Without our customers we would not be where we are today, we just want you all to know how much we appreciate your business. We've come a long way, and are proud of our products, customer service, and most of all, our customers. As usual any questions or comments we will be more than happy to address. Also during May we have a friend (Buffman Range) finally reviewing our 3X Optic flipper and we will be posting that review. Letting everyone know how the system works, giving an honest review from a third party allowing everyone to make their own conclusion before making a larger purchase like the flipper. Thanks for your time and happy plinking! Duane & Sam 401-783-0487 Dmachineri.com.