Most of this review is based on the P20A2 since they are practically identical in terms of physical construction. Specific differences pertaining to the Mark II can be found in the following Output section.

The P20A2 Mark II's main difference as compared to the earlier P20A2 is that the LED module is now a removable drop-in. Other aspects are effectively identical to the P20A2 as will be described below. Up the front, there's a removable stainless steel bezel with five-point crenellations allowing light to shine through when left placed head down. Removing this bezel allows the attachment of the colored or diffuser filter. These filters are made of plastic and during tests I found is somewhat a pain to screw them on as their threads don't mate well, thus resulting is some cross threading and grinding on the plastic filter threads. The AR-coated glass lens is held in place by a raised lip, and does not drop out when the bezel is removed. Behind the lens is a lightly textured reflector which is well finished with no noticeable flaws upon visual inspection. The LED is well aligned with the reflector as well. New to the 20-series of EagleTac lights is the ability to interchange reflectors, and optional textured reflectors are now available for the this series. As such, the head comprises of two main section. The front half holds the glass lens and reflector with can be easily unscrewed with a needle-nose pliers or tweezers. The rear half of the head houses the main light engine which comprises of the LED and electronics. Its exterior is covered in knurling which provides good grip for mode changes. The "+" battery contact has a raised lip which works as a reverse polarity protection. Threads between the head and battery tube mate well with no issues.

The battery tube looks very similar to those of iTP lights. I personally prefer the design of the earlier EagleTac series, but that's totally subjective of course. The four bands of horizontal machined lines provide adequate grip, with two flat surfaces where branding is printed on. There's also a slightly recessed area towards the rear end which helps when held in a cigar grip. Attached to the rear of the battery tube is a pocket clip which allows for head-down carry. It is removable but not reversible for head-up carry. The clip has firm tension and the raised end makes it easy to slide into pockets and such. Threads on both ends of the battery tube are well machined and came well-lubricated. There're o-rings on each end placed behind the threads as moisture seals. The tail cap has a clean design which is mostly covered in knurling for grip during battery changes. By default, the included tail cap has a protruding switch cap which allows for easier activation but doesn't allow the light to tail stand. An optional tail stand cap is also available. The switching mechanism has a good amount of tension and average travel, it also provides a firm and audible click when fully engaged. It is a forward push button switch which allows for momentary activation. The entire light is finished in a lightly matte, Type 3 anodizing with no visible flaws.

If you're unfamiliar with any of the terms used in this review, click here for explanations on common flashlight related vocabulary.

As mentioned above, the main difference brought about my the Mark II pertains to it's user interface, and the use of Cree's new XP-G LED instead of the former's XR-E. There is also a neutral white version available which uses an XP-E LED instead for a warmer color tint but providing slightly lower overall output intensity.

The basic operation allows for Turbo mode with the head tightened, and General mode when loosened. Low, Strobe, Beacon and S.O.S. modes are now categorized as "Hidden Settings" which is activated by performing a quick tighten-loosen motion of the head (from an initial loosened position, i.e. General mode). Beam profile produced by the P20A2 Mark II has a narrow hot spot with a soft corona surrounding it, quite similar to the earlier P20A2 in fact. No beam artifacts were detected within the profile, having an almost pure white tint as well. The output and runtime performance are pretty much the same as the P20A2 as well, with the runtime provided on Regular mode being slightly longer. Though this could be an inherent effect of variation of LED binning where those with lower forward voltages (Vf) are able provide better regulated runtimes as compared to those with higher Vf's.

The Good - Fit and finish of main body parts is excellent. Very bright on Hi level for a pocket-sized light. Simple user interface with nice variation of Turbo, General and Low brightness levels with well maintained regulation

The Bad - Below average runtime on Turbo mode.

The Relative - Smooth beam profile with nice white tint. Uses a forward push button allowing for momentary activation. Removable pocket clip. Can tail stand with the included cigar-grip attachment.