The Makasi Lower Receiver is NOT compatible with an AR15 Upper Receiver, full-stop. There is no rear Take-Down Pin on the Makasi system to mate with an AR Upper Receiver.
Anyone who thinks that the Makasi is an AR derivative just because it utilizes AR parts for high-wear items such as the Bolt-Carrier Group as well as the Trigger Mechanism and Ejection Port Cover are off-base. The Makasi design predates Bill C21 and the Assault-Style Weapons evergreen definition. Hence the 5-round STANAG pattern Magazine.
This thread has taken a turn into dangerous territory with the confusing talk of Legion products being AR15s. The RCMP have determined that the Makasi specifically, is a unique design, no doubt based on the complete incompatibilty between the Upper and Lower Receivers of the two platforms as well as other specific features. Please give the speculation a rest, lest we plant false ideas in the heads of Poly, et-al....
The Makasi is what it is - a unique rifle which pre-dates, and therefore escapes the anti-semi-auto evergreen definition of an Assault-Style Firearm. It has been determined by the RCMP to be a NR rifle in Canada under extant legislation. Let's leave all of the innuendo and negative speculation about Brigade's other products to Poly and their ilk. We just need to quietly await the arrival of the Makasi later this year. Once we have them in hand, we can speculate to our hearts' content. But let's not kill the deal before it can come to fruition with foolish, loose talk of AR-equivalency.