Product Description A.R.M.S. 74 Extension Cantilever Extension for #74 Mt. for Comp M4. Fits in between Comp M4 and 74 Throw Lever Mount to give you 1/2a ^2 height. 100% MADE IN THE USA. ARMS 74EXT Extension at BOTACH Browse all BOTACH deals $35.00 In Stock at BOTACH Price checked 9 days ago Buy Now at BOTACH Secure checkout Easy returns or compare prices Amazon eBay Product Details Brand Arms More Arms