If you built my M1911.45 then this will be a familiar gun. It uses the same ammo, is a single shot, and still gets 55 feet :D
There are some advantages with this gun over the other. This gun can handle a lot more elastics, it is more comfortable, it looks better, and it is (I think) more accurate to the gun I was replicating it to than the last one.
So this gun is a single shot, and because of that it gets great range and is very reliable and accurate.
Also, It would not be hard to make a concealed mag for about 3 shots in the front of the gun if you think it is absolutely necessary.
I basically already went over the pros and cons in the previous paragraphs, sooo, build it if you want to!
I apologize in advance of some of the mistakes I made in the instructions :(