Product Overview
Spring Kit for those that need to modify their BFM to Fit Blackwidow/Cryo Lowers whose recess is not wide enough for our spring. If you cannot modify the spring when on your BFM You will need to do the modification using a Dremel or Small Grinder to get 1/4 point (see pictures on this page that show the modification YOU will need to make to fit into the lower magazine spring recess as it is not wide enough. We encourage you to apply "Blue" to the spring- post operation. We use black oxide to treat the spring to prevent any sort of corrosion. Blueing or black oxide will help spring remain excellent. Kit Comes with 1 spring and 2 ,1/8 inch black rivets. You can perform this operation while on the magazine-using caution not to touch the Nylon Top, or you can remove spring and re-rivet when complete. Feel free to call our email our team to discuss further details.
