Originally Posted by fsted2a
The M16 assault rifle wasn't designed to be a designated machine gun, just an assault weapon with [B]occasional[B] full auto fire. The M16A2 LSW was intended to be a machine gun from the start-no select fire option. The open bolt firing was to avoid a runaway gun due to cookoffs. It all depends on what you want to use the weapon for. The reason I suggested the LSW upper is from reading the rest of the thread, you might be considering firing a significant percentage of your rounds on auto, and the LSW has a heavier barrel and a bigger gas tube designed specifically for that purpose, as well as a heavier bolt carrier. It depends on what your useage is as to whether or not you want to consider an LSW upper. If you don't get the LSW fire control parts, you will still be firing close bolt.
Also, LWRC has a select fire control that switches from closed bolt for semi to open bolt for auto. If you are firing a lot of rounds on auto, that makes sense to avoid cookoff firing.
The m16 im in the proccess of getting is the forerunner of the m249 saw. Its the original colt hbar designed to be a squad weapon. Its got the m60 bipod full heavy barrel and strengthened gas tube.
My purpose is a light pkm style using beta mags instead of belts.
In shtf my wife will be running the m16 ill be using one of my precision rifles. For her she is well versed in the regular ar15 im just adding an extra feature while keeping the manual of arms the same.
I have been training her as my spotter and she is getting decent at distance estimation.
If shtf parts for a open bolt or belt fed upper wont be easy to get while parts for a standard ar upper will.