Modify M-Lok 5.3" rail

Modify has introduced a brand new Picatinny rail to go with the new M-LOK handguard that is CNC machined, which is also compatible with most handguards on the market. The central form has also been restyled to depart from the old-fashioned Picatinny with the fore and aft surfaces machined for a better look, not to mention offering an improved feel for players.