Not to cut hairs but wouldn't an M4A1 be a carbine length gas system? if you want to really go clone why not go with a Colt upper? While fit and finish(mostly finish) might not be quite as even as a BCM it is milspec and would be more original to a clone build I would think.
"I don't collect guns anymore, I stockpile weapons for ****ing war." Chuck P.
"Some days you eat the bacon, and other days the bacon eats you." SeriousStudent
"Don't complain when after killing scores of women and children in a mall, a group of well armed men who train to shoot people like you in the face show up to say hello." WillBrink
Bookmarks