I have purchased several free float handguards from Acme Machine over the last few months, and have been so positively impressed with the strength of materials, and fit and finish, that I have made Acme my "go to" for my after-market AR/M4 products. I used their Super Slim 5 Slot KeyMod Rail Section, to attach my bipod to their 17" Super Slim KeyMod Gen II Keymod handguard. The installation was quick and easy, and the bipod is secure on every axis. I have found Acme Machine's parts and accessories to be FAR SUPERIOR to the "low-priced spreads", and equal in quality to handguards costing twice as much. It is a pleasure to deal with Acme! Trust me... If you buy your parts or accessories for your AR15/M4 , from Acme, you WON'T be disappointed!