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A Comprehensive Guide to Sig Sauer P320, M17 & M18 Optic Cuts The Sig Sauer P320 platform, including its military counterparts the M17 and M18, has become exceptionally popular for its modularity and performance. A key feature for modern shooters is the ability to mount a red dot sight, but navigating the world of optic footprints and slide cuts can be confusing. This guide will demystify the factory optics-ready cuts on these popular Sig pistols to ensure you find the correct mounting pla …

Can You Believe It - .50 BMG Rated?! We received a Facebook message from Grant H., one of our customers asking if our Keystone Rings were .50 BMG rated. He had another brand's rings that were .50 BMG rated and he had issues with them. We responded saying we had not tested them on a .50 before, surprisingly, no one here has a .50 BMG rifle with a spare handful of rounds ready to go. Being the curious folks that we are (George even has the shirt to prove it), we sent a set his way for som …

What You Need to Know About Our Keystone Rings Why are they called the Keystone Rings? Are they made out of stone? Our Keystone Rings' name is an homage to the official state nickname of Pennsylvania, where we lovingly call home. U.S. history is important to us and we are proud to be located in a state with such deep history, especially materials and manufacturing. Being located in the middle of the original thirteen colonies, as well as playing a key part in shaping the social, political and e …

Straight Wall Cartridges What's old is new again, again. There has been a resurgence in straight wall cartridges stemming from new laws on the books in certain states. Previously only allowing shotguns for hunting deer, states like Indiana, Michigan, Ohio, and our own Pennsylvania are now allowing the use of rifles chambered for straight wall cartridges. Now, this isn't hunting advice, we always recommend checking with your local game commission to verify which laws they have on the boo …

1911 Rear Sight Cuts There are many different commonly used rear sight cuts for 1911s. This image covers many of the most popular that we make plates for. Novak The most popular rear sight cut is the Novak cut. The bottom of the dovetail measures around .50". Many 1911s use this cut, from Colts to Rock Islands. Some manufacturers do a better job at holding their tolerances with this cut and we have found that sometimes our mounts may require a bit of fitting. G.I. …

Savage FAQs Savage Arms has been around for over 100 years. Through the years, models have come and gone and changes to their models have naturally occurred as well. We have a great knowledge of Savage rifles and which mounts fit specific applications. The Savage Shooters Forum is also an excellent resource for an even deeper dive into the world of Savage Arms. They have tons of models and we have tons of bases. We will reviews the most common FAQs when it comes to Savage firearms. Flat Back vs …

Scope Ring FAQs We've seen it before - you have your gun and your scope, but that new short tube, 34mm glass you bought doesn't play nicely on your 7mm Mag. Your go-to twist in rings will not suffice, the tube is too short to reach. You must now use some sort of one piece rail with separate rings! Fear not, we have you covered. There are many different options, but one of the most common ways to get your glass on your gun is by using an accessory rail. Which one should …

How to Install Our Scope Mounts You need to mount your scope to your gun, but how? There are many different options, but one of the most common ways to get your glass on your gun is by using an accessory rail. Which one should I choose? Well, a picatinny rail of course. Picatinny rails have a standardized set of dimensions which allow manufacturers to make rails and rings that will play nicely with other picatinny products. These include cross slot widt …

I am purchasing a mount for my Tikka T3. How do I know which screws I need?Pre-2003 Tikka T3 rifles use 3.5 x .5 metric screws.Post-2003 Tikka T3 rifles use 6-48 screws. I have received my mount for the Tikka T3 but the screws will not start. What do I do? Did I order the wrong screws?The diameter of the different-sized screws is within .001”. The thread pitch of the screws is within .001” as well. If the screw you have will not start, neither size will start. This is happening for the fo …

Bushing Finder Here at Evolution Gun Works (EGW), located right in Quakertown, Pennsylvania, we're passionate about 1911 performance. A critical component for achieving tack-driving accuracy and smooth, reliable cycling is a perfectly fitted 1911 barrel bushing. We know that navigating slide and barrel dimensions can seem daunting, which is why we've streamlined the process. Our innovative EGW Bushing Finder tool, combined with our precision custom 1911 bushing boring service, ensures you get t …