First of all, if you thought the barrel looked too long, you'd be right. I got the figures mixed up for the lengths of the barrels of various different Colt weapons, but that's only a minor detail. Secondly, yes, it's basically just another M4 assault rifle under another name and very slightly different. And the body is more realistic than ever before.
The best thing about this gun, though, even if I haven't perfected it yet (it doesn't fire because the barrel is too tight and however much I loosen it it still won't work), is the brand new reloading mechanism. Many times in the past I have tried, and failed miserably, to build a shotgun in which the elastic band fires and catches on two prongs, before being pulled back to the firing prong and having another bullet inserted.
This time the charging handle (the bit that comes out backwards behind the carrying handle on the top) has two prongs inside the gun attached to it which catch the elastic band when it is fired. It is pulled back, whereupon it puts the firing prong back into position and then the elastic band catches on it. A bullet is dropped in through the barrel and is supposedly fired.
The reloading works fine. It's just the small matter of actually firing the thing. I'll work on that for the next gun. Not this one, because the elastic band has broken and I'd have to take a large part of the gun apart to replace it.
For those of you who have been asking what I used for a bullet, it was two of those pin connector things (tubes, 16mm long), held together by a black technic pin, with one of those 12mm long dark grey pins sticking out the front. But I could have used anything 8mm wide, such as a stack of 1x1 bricks turned on their side (except that they might have broken apart during firing).
The bullet needed to be a certain length. If you look at the second picture, you can see the light grey piece, which was the backstop for the bullet, and when resting against that the front of the bullet had to extend beyond the prongs that caught the elastic when they were in their forwardmost position.
I know that's a terrible explanation but it's the best I can come up with at the moment.
I've been inundated with requests for instructions recently. Sorry, but not only do I not have time to make instructions, but also the models have usually been dismantled by the time people ask.
Wow that tops my AR-15. Mine doesn't even fire anything. It really looks exactly like a real one if you look at it from a distance! I'm still trying to understand how you managed to make the front grip with plates facing outward on all sides. Great job.