Magpul MASADA/ Bushmaster ACR
are the same rifle as pointed out by Cesquared already
wasnt there a shot where harper takes one of these from his weapon rack?
Yesterday I went out to buy a Masada airsoft but when i saw it in person it dawned on me that the A&K has the cocking lever in the wrong spot! The Oblivion rifle has the lever much further forward. Older Masada airsofts have it that way, but it looks like all the newer ones have it above the magazine. (Luckily I was just able to track down an older model.) Unfortunately, almost all the "correct" models are a lot more expensive than the A&K.
However, even with the cost of the rifle... it would easily be outdone by the cost of the flashlight! I've sent them an inquiry, but I'd be surprised if that piece alone didn't cost $500+
Definitely not a cheap replica to make if you want accuracy.