The Sylvan Arms Flared Magwell allows no-look, faster loading of magazines. With integral trigger guard, and wider flare than competing products, the Sylvan Arms Flared Magwell outperforms any other magwell available on the market today. Sleek Design with super wide mouth diameter allows for faster magazine reloading Solid yet lightweight Low light magazine changes Designed to fit a variety of platforms Easy installation in less than 15 minutes Works with Most AR15 Lowers with Removable Trigger guards Does NOT work with drum mags Does NOT work with Gen 3 Magpul PMAGs (Yet) Product Details Weight: 1.4 oz. Material: 6061-T6 Aluminum Finish: Black Anodized Sylvan Arms Limited Lifetime Warranty Check out the install video Here . If you have a custom build and are in need of the coil spring that customarily comes with a rifle, it is not included you can order one here .