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cool_guns Monday, May 28th, 2007
Period of
Product Use:
Less than a month2 of 2 people found this review helpful.

3 years
Products Used:
None like it
Marker Setup: JCS MKX8, red dot, 3 point tactical sling, Triumph SL-200 hopper, brass eagle 1"-1.03" elbow to use the SL-200, APEX w/ UMS Barrel Adapter, remote, Nitro Duck 90ci 4500 HPA tank.

Highly customized and modified Spyder MR2 - Low Pressure setup, CP shorty reg in the front grip, New Designz HP valve, ACP Low blow blolt and lightened striker, CP ON/Off rail ASA, macro line, T-boarded w/ break beam eyes installed, custom made eye covers, modified dye stickies, Sun dragon low rise clamping feedneck, modified stock for mask clearance, red dot, 3 point sling, Same hopper, remote and HPA tank.

Just ordered an APEX with the adapter to use on the MKX8, will update when it comes in.
Definitely use a decent agitating hopper for this, don't need force feed hoppers due to the special detent design as you will probably feed past the detent.

Hopefully JCS will make some barrel adapters to use other barrels on it.

I'd like to see if JCS could develop the detent in different strengths.
Strengths: Very Sturdy
Smooth Trigger Pull
Nice stock barrel
Out of box mil-sim
Weaknesses: Detent could be a little stronger but worked fine.
Stock hopper
Review: Well, I've had my MKX8 for about 2 weeks now. I got if from as it came with a red dot sight for $359.00 shipped. When it arrived, I found that the red dot was the $30.00 30mm BSA red dot that you can get at Wal Mart, which is a nice, durable red dot and the same that I happen to use on my MR2. In addition to all the extra orings, spring, manual, hex keys and the 3" and 6" rail, the extra composite rail kit was included as well at no charge, don't know if just decided to throw that in or what, but that was a nice bonus.

The whole marker has a nice solid feel, no flex at all to it, even after several strip downs. When it first arrived, I stripped it completely down first before airing it up just to get a good look at everything. I found that the striker and bolt were heavily oiled out of the box. I did clean them up and relubed with smart parts sleek on the orings, also covered the entire striker with sleek as well, just allow it to glide easily in it's tube. Just a personal preference that seems to work well. I also noticed that even though it's a double-stacked tube, blowback design, both the striker and bolt are definitely, a custom, specific design by JCS. Also the sear is much wider than your typical spyder type sear. It seems more heavy duty to me. I had heard about the feedneck issues but mine was already screwed in place in the upper receiver and felt very solid. After reassembling it, I aired it up, no leaks. I dry fired it a couple of times, then threw on the stock hopper, took it out side and fired a few balls through it. It seemed to shoot nice and I was satisfied at that point w/ my purchase.

I did one mod to it. Because I'm using an elbow and an agitating hopper, I cut the feed neck down about 1/4" to allow the elbow and hopper to sit a little lower and tighter to the body. This has worked well.

GAME DAY: Yesterday, I finally got to put the marker through it's paces. I play mainly woodsball, recball and scenario. We have private land that we get to play on in the deep mountains here in colorado, elevation is about 9000 feet. I put 1400 balls through it and had one barrel break. I was shooting JT Tacticals, so it's kinda of a low to mid grade paint. I had lucked out and had got a good case, quality seemed about the same as eliminators and were a good match for the stock barrel. They are about a .687-.688 ball. I did not have one single chop in the 1400 balls and that was even doing some excessive long, fast strings of suppressing fire. Once I had a feel for the mechanical trigger, it would shoot, reliably, as fast as I could pull the trigger, maybe 8bps and due to the 15bps hopper, had no issues of mis-feeding or chopping. The marker simply shot when I needed it to, as fast as I could, and as long as I could. No issues at all. That really sold me on this marker.

With the 3 point sling and remote setup, the marker was fairly easy to maneuver, maybe not as easy as having a more compact setup say like a stock X7, but still I like the carbine setup/length. The weight of the marker was just perfect in my opinion.

Once I had the red dot sighted in, I could see the balls hit pretty much on top of each other within about 75', but groupings did start to spread after that. I chronoed about 280fps. I wasn't completely happy with the accuracy and range if I had to shoot more than say 125' so I am going to put an APEX on it to give it the flatline capability. With the 7/8" adapter for the APEX it should fit fine. I had measured the OD of the barrel tip and it's right at 7/8".

For efficiency, I was very pleased. With my 90ci tank, I used 2000 psi for 1400 balls. That means that I could easily shoot about 3000 balls on a full tank fill, if I ever needed to shoot that much that is.

As for the composite plastic, it's very durable. I didn't feel like I had to baby this marker at all and it's doesn't have a mark on it either after a full day of play, other than having to break it down to clean paint splatter, which just wipes away easily with a damp rag.

At first, I was not that pleased with the detent design, but it proved to work well. I just made sure that before I cocked the marker and aired up, I flexed the detent up a bit and it was fine the whole time.

Upon inspection of the "engine" during my "after game strip down/cleanup/relube", I found that the sleek did it's job. All the orings look perfect, with the sleek still in place everything still feeling lubed. I wiped everything down and relubed for it's next use. The sear showed a little bit of normal wear, nothing excessive for the amount of use it saw yesterday. I do think I'll do a polish job on the sear and striker though to see if that will help slow the wear down and maybe smooth things up even more.

I don't think people should try to compare this and the SP8 to each other, as both markers are so completely different. The MKX8 is a marker that may have a limited customer base as it's designed for someone that wants a mechanical XM8 style marker. I already have a great, low pressure, quiet, fast shooting, reliable, e-triggered marker in my highly modified MR2, so i didn't need an SP8. I love the XM8 look but wanted a good mechanical marker, so this was exactly what I was looking for. I had considered an A-5 with the G36C kit but that was going to cost more and It still looks like a dressed up A-5 to me, not as realistic as the MKX8. Plus, most of the guys I play with have A-5's and X7's ( and no, I don't have any issues with tippmans, they are great), but I really wanted something different.

6/18/2007 - My APEX barrel with the UMS adapter just arrived today. Using the adapter, the APEX installs perfectly on the stock barrel. Haven't shot it yet to test but it looks good.
Conclusion: All in All, I'm really pleased with this marker. Maybe it's a little pricey, but I do think you get a solid, reliable, mechanical XM8 for the money. I've seen guys with a lot more money put into their markers who have nothing but problems with them, probably partly due to the fact that they don't know how to maintain their markers either, but still for a complete mil-sim out of the box, I'm very pleased with this marker and happy with my purchase. Plus, I have confidence in knowing that Blackpoint Engineering JCS completely back this marker with a 1 year warranty. I won't give anything a 10 as there is always room for improvement, but I'd have to say the MKX8 completely delivered in what I wanted and performed to my expectations so it gets a 9.
9 out of 10Last edited on Monday, June 18th, 2007 at 5:56 pm PST

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