Hello all! I'm a new owner of a Colt M4 .22 Carbine. I wanted the OPS model, but they were sold out at the time. Since I had to settle with the OPS I would like to install an alternative forearm rail system like this one: http://www.cheaperthandirt.com/31023405-1.html Would any AR compatible forearm rail work? Has anyone installed one of the Tapco models? Thanks!