It depends do you play more agressive or more defensive
Agressive: ACR (you can also play defensive with this gun)
Defensive: MK14 (it works better if you play more defensive with this gun believe me)
I personally prefer the ACR but thing it like this:
ACR it's a really comfortable weapon it feels really balanced
MK14 it's a really powerfull weapon (1 to 3 shots to kill actually)
it's all about preference what do you feel you are more comfortable with.
I use the ACR with extendeg mags and a silencer i really don't think kick or impact do a difference in this gun
the answer is easy option...if i were u,i would choose acr..man acr can get everyone down..it provides u good accuracy,effective damage and this gun can win a good sniper and offer u the chance to keep and improve ur current killstreak..mk14 is good too,but it is one bullet gun..it is slower than acr and u must think that acr is the only assault rifle that has so intensive accuracy...to sum up,i offer u with no thought acr!!!
The ACR is far easier to use. The MK14 is a very good defensive gun, if you're able to control the engagement and keep everything mid to long range its a solid weapon, no doubt. Overall the ACR is much easier to use though.
ACR Silencer+Ext Mags (attachments)
Specialist: Assasain Pro, Marksman Pro, SoH Pro
MK14 Silencer+RF (attachments)
Specialist: SoH Pro, Steady Aim Pro, Assasain Pro
Those are my typical set ups with those two guns, I find the ACR works well in all situations, and the MK14 does better on maps with longer lines of sight.
i prefer the MK14 that being said i can unload half the mag in less than a second, i think your opionion with the MK14 really depends on how much lag you get and how fast your trigger finger is, see as i said i can shot it REALLY fast so close quarters isn't a limiting factor for me as i can easily put two bullets into somone before there automatic can put 3-5 in me and if you can do that the MK14 is probbly the best gun in the game.
I prefer the ACR 6.8. I will either use the Attachments or Focus prficiency depending what gamemode I'm playing. When using the Attacments I like to use supressor with extended mags. Or with Focus I just use a supressor.
The MK14 is a great rifle. I just prefer to use it in HC objetive gamemodes. Altough it's still a great weopon in the Standard playlist as well.
I like the MK14 w/ Rapid Fire and Extended Mags. It's just quick and especially in objective based games you don't have to get close to them to defend your area of the map and win games. It's 1 shot to head, (as you probably know) and 2-3 in body or feet. It's just so powerful, and it's different from the usual that everyone uses. Don't get me wrong I love an acr but it just seems like so many people use them you know, it's just over-used. So yeah, that's my opinion on the subject. Hope I helped.
I prefer the mk14 over the acr most times. Especially in longe range maps.
red dot w/silencer.
specialist package: marksman, soh, and assassin.
frag or throwing knife (whatever you prefer)
portable radar or tac insert.
In my experience, I find there are no bad guns in this game. It all depends on how well you use them. I've used them all. After resetting my stats and starting over again, I decided to stop at lvl 80 and not prestige again. All there is left for me to do now is to get all my guns gold. Right now I have all the ARs gold, except the mk14, which is at lvl 31 right now. All my SMGs are gold. I have the .50cal, L118A, and the RSASS gold, and am currently working on the AS50. I have the M60 and the PKP gold, and am working on the MG36. And I only have the USAS gold so far, and am working on the AA-12.
Like I said, there are no bad guns. I've done well with them all. It's all a matter of preferance. But if I had to choose a fully auto AR, I'd probably pick the SCAR.
You are the only one I agree with, like you said some weapons are harder to master like the PKP, AA12, MP5 and more. The reason I dislike ACR MK14 MP7 and PP90M1 is because they are easy to control, although PP90M1 was my first gold gun just because I thought the UMP45 is OP like in MW2 and the MP5 OP like in COD4 but after I understood its really unfair in close quarters with the redicioules rate of fire I stopped using it.
about the topic, try using SCAR-L silencer and extended mags
specialists: SoH, Assassin and either steady aim marksman or blast shield.
If you know how to reload cancel it wouldn't take you more than 1 seconed to reload.
I like the SCAR-L because It's so much like the ACR except it takes more than 2 minutes of gameplay to master that gun.
and for gods sake guys, don't use ACR nor the MP7 in S&D and claim that you are pro's just because you tryhard with unbalanced guns..
I've been using the MK14 a lot lately and I believe it's one of the best guns in the game. Genually I use Thermal and Stability. It's more satifiying getting kills with the MK14 than the ACR because it's a harder weapon to use. I do camp a bit more with it because it's simular to a sniper rifle but when I need to flank I change to the MP9.
A word of warning though: if you know you're lagging, don't use it because I've found lag affects single shot guns more
MK.14 is my favorite gun in MW3! I can't really stand the ACR 6.8. I use the MK.14 all by it's self it doesn't need any attachments or profiency's because it's so good. I would definatly choose the MK.14 over the ACR 6.8. If you put rapid fire on the MK.14 it makes the fire cap to the point of where it will fire as fast as you click the fire button and some people are really fast with it.