I have always been a fan of the MP-5, it was the first machine gun I ever bought. I also have several Colt 9MM SMG's but have always hated the magazines. I have always loved the ease of loading MP-5 magazines. Last month I visited a local gun store and I stared at the wall for a while. There was a AR-15 with a MP-5 magazine sticking out of it. The store owner takes it off the wall and hands it to me and holy crap it was not just stuck in it, it belonged in it. Last week I ordered a lower and got it today. It does require a specific upper or be willing to get out the die grinder and make clearance for the magazine on your own. New Frontier Armory out of Vegas makes these and it is about $175 for a lower and about $120 for the upper but to be able to pull a magazine out of my MP=5 and stick it in my AR-15 it is well worth it. I will be ordering a few more of these soon including one of their side folders that uses MP-5 magazines.

