Smith & Wesson 1911 "E" Series. The "E" stands for Enhanced. Featuring Enhanced Oversize Extractor, Enhanced Combat Ejection Port, Enhanced Titanium Firing Pin, Enhanced Precision Trigger Enhanced Laminated Wooden Grip, and Enhanced Detailed Slide Rib. Also featuring a 4.25" or 5" barrel, and the TA model has a Mil-Std 1913 Accessory Rail.