Wanting to modify M16A3 AEG into a DMR.

3If you are set on the M16 path, I would do a few things for sure:

1) Shorter inner barrel (300-363mm)
2) Ensure a full cylinder assembly with perfect air seal, including a o-ring equipped nozzle. Preferably a full bore up kit with a heavy piston and piston head.
3) Use a heavier BB than what the rifleman crowd is using, kinetics is about half of the story here. I run my “recce” rifles with .32g-.36g BB’s , depending on which responds better. I don’t run a DMR with less than a .40g, but I run aV2.gearbox with a bore up kit.

Odds are, that M16 will need to have to have its gearbox opened, especially if it already doesn't have a solid mosfet/trigger assembly, and probably a motor if doesn't already have at least a JG Blue.

Putting all that aside, if you are looking to not have to do a lot of modifications, a friend of mine bought a CYMA Platinum SR25 “Sniper” morel (full barrel, full stock, QD suppressor) , brand new, and all we had to do to it, to make it rock, was change the spring, and put a R-hopped SS 6.03 inner barrel that I had sitting around and flat hop bucking/Omega nub, and its launching .40’s like a champ, with noteven having to open the gearbox. V2.5’s are a powerful dru….gearbox! The CYMA Plat-SR25’s are usually running below $300.00, and already has items that a standard M16 replica is usually lacking.

The other benefit is that there is no field in the universe that would argue that it would qualify as a DMR model.