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Editor’s Note: Daniel Defense's Mk18 runs extremely well. It's a blast to shoot and handled well in CQB-type training scenarios. We've put well over 1,000 rounds through our model, and it's still running like it did day one. We did have a little trouble with DD proprietary mags -- but that was managed by removing a couple of rounds and gently seating it into the magwell. PMAGs run great, though! The Mk18 is a fun pistol or SBR option (depending on what you prefer). Chambered in 5.56 NATO, it offers a 10.3-inch barrel on a 28.6-inch overall length. Pistol versions sport an SB-Tactical pistol stabilizing brace (keep an eye out, though, as laws may be changing there).
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"In the market for an AR-15 that runs exceedingly well? Or do you like that distinctive MK18 silhouette? Then the Daniel Defense MK18 is a fantastic option." -- John C.

The MK18 from Daniel Defense is an instant classic that runs as well as it looks. That being said, expect to pay a premium price in exchange.
Has no problems. Runs extremely well like any Daniel Defense Firearm. Would recommend to anyone who can afford it.
I've had my Mk18 for about a year now. No problems whatsover, it takes all sort of ammo, accuracy is surprisingly good for a 10.3 barrel (even on lighter ammo). The only thing I wish it had is an adjustable gas block for running it suppressed.
The Daniel Defense MK18 is a premium product, sold at a premium price, but comes with subpar (milspec) internals (trigger, bolt catch, selector, etc), furniture that no one wants (just put Mapgul on it already), both that will be replaced immediately all while on an outdated barrel length (10.3"). For those unaware, 10.3" barrels perform significantly worse than the minor adjustment to 11.5", and why that length has officially been adopted by most units previously utilizing the 10.3". Similar to my SCAR review, there is nothing inherently wrong with the MK18, but for $2200 you're getting a $1600 rifle with a $600 markup because it has the cool SOCOM factor. I have one, I like it, but I wouldn't recommend buying one over other offerings on the market for a similar or reduced price (BCM, Geissele, Triarc, etc).
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