Upgrade the reliability and performance of your Series 70 1911 .45 ACP with the Evolution Gun Works Oversized Firing Pin Stop designed specifically for rear sight cuts. This precision-engineered component addresses common issues like extractor rotation and slide lateral movement, delivering smoother operation and more consistent ejection in demanding tactical and range scenarios. Key Features Oversized Design: Wider than standard GI specifications (typically .466 inches) to securely lock the extractor in place, preventing unwanted turning for enhanced ejection reliability. Enhanced Thickness: Eliminates lateral movement of the firing pin stop, promoting stable slide cycling and improved lock time consistency. Rear Sight Cut Compatibility: Pre-cut across the top to accommodate adjustable or fixed rear sights without interference, ideal for customized 1911 builds. Durable Construction: Crafted from carbon steel with a blue finish and hardened to 48 Rc for exceptional wear resistance and longevity. Radius Engineering: Radiused inside corners reduce cracking risk, while the .015-inch back corner radius maintains a square edge to help slow slide opening speed. Specifications Material: Carbon Steel (Blue Finish) Caliber: .45 ACP 1911 Series: 70 Hardness: 48 Rc Drop-In: No - Requires professional fitting for optimal performance Dimensions: 0.65" L x 0.48" W x 0.13" H Weight: 2 Why Choose This Product Standard firing pin stops can allow extractor movement that leads to inconsistent ejection and accelerated wear. The EGW oversized stop solves these pain points by providing a tighter, more secure fit that enhances overall firearm function without requiring extensive modifications beyond proper fitting. Its specialized design for rear sight cuts makes it a perfect choice for shooters who prioritize both performance and customization options in their 1911 platform. Whether you're refining a competition pistol or maintaining a defensive firearm, this component contributes to smoother cycling, reduced recoil impulse perception, and extended service life. Installation Note This part is oversized and must be fitted by a qualified gunsmith to achieve the intended benefits. It is compatible exclusively with Series 70 models.