"It's a KWA, what else is there to say? Well, a good bit actually. So if you're familiar with KWA, they have a pretty standard build/setup to their pistols: Metal slides, plastic outer barrels, and in the case of the Mark 23 (much like the real one) a polymer frame. So let's break it down, and mind you I'm going into a loooot of detail:
BUILD: No doubt the polymer frame is excellent quality, good texturing, and heck, if the checkered/textured grip doesn't suit your fancy, a Hogue rubber grip will fit on it just a well as on a real one. The slide is metal, not the best I've seen, but a good enough metal that paint and trademarks aren't gonna wear off. It comes with a rail, unfortunately it is not a typical picatinny rail, so you'll either need a rail adapter or hunt down the specific underrail attachment. The threading on it is also fairly uncommon to the typical 14mm +/- threading, so again, you gotta hunt one down or get a 14mm conversion threading, a Kriss Vector one will work. The iron sights are high enough that generally any suppressor as wide as the original Mark 23 suppressor will not get in the way of aiming. Also, the magazine is practically INDESTRUCTIBLE. For some reason I've dropped the mag numerous times on the side, lip, bottom, and here's the big thing: full metal, the only part that isn't metal on the mag is the bottom plate. The lip may get scratched up and the plate may get dented up, but nothing a little sanding won't smooth out, and it still functions! I should mention also for after market parts that there is a full metal slide and barrel available. The slide is outrageously expensive (around $283), but the outer barrel is $55 which isn't too bad.
AUTHENTICITY: Oh yeaaaah, it's got about as much as the real deal. A functioning separate, smoothly integrated decocker, as well as a ambidextrous safety (Note that it only works if you have the hammer cocked, careful), and H&K trademarks all over the grip, side, barrel, even the magazine. The look and feel is about as accurate as you can get to the real thing in airsoft. I will say however, that I wish they did a stamped trademark as oppose to the white ones they put on the slide.
PERFORMANCE: It's a KWA, and naturally with that it performs quite well, has a great feel, the trigger hole is spacious enough that you could wear any sort of gloves and still be able to pull the trigger, single action or double action! Gas efficiency wise, you don't really see a problem with it, provided you filled it correctly. Although i wouldn't say it's the most accurate pistol I've shot, it IS very accurate. A 3-inch target at 50 feet is a easy shot, which is crazy. Best use .25gram with this sucker. Only downsides I would say is that it is a biiig freakin gun so if you have a small hand reaching around to grip it and hitting the slide release might prove a challenge. Upside is the ambidextrous magazine release makes it easy to reload with either your thumb or even your middle finger. White dotted sights make for easy target acquisition and aiming.
So all in all, is it worth the price? I know it has my approval."