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Posted: 4/12/2009 6:00:59 PM EDT
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What is the difference between the TA31RCO-M4CP and the TA31RCO-M150CP ?
Is the reticle calibration different or the same? Are there any good posts or articles on the utilization of these reticles. |
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I'll see if I can help on this one as I did some research on this before I bought mine (I chose the M150CP). As you can see in the specs there is a difference in the adjustments, the M4CP, like most other ACOG's has a finer 1 inch per 3 clicks @ 100 yards. For me I like the 2 clicks per inch because it's easier to remember and I like the round numbers. You rifle isn't likely to be so accurate that you would know the difference.
Moving on to the drop compensator and sight picture, I am almost certain that they are the same in every way. When looking through mine (M150) there is a label at the 6 o'clock position below the image circle, and it reads "TA31RCO-M4", not "TA31RCO-M150" so I think they use the same BDC for both and the only real difference is the lens caps and the adjustment pitch. Regarding the flip caps, they are nice because they protect the lenses from getting dusty/dirty (and they look cool). There are a couple small things I don't like about them. First, the front cap only fits if you have the killflash installed. I like to take off the killflash at the range because despite the fact that it looks awesome, it lowers the image quality and brightness a bit and I like a bright sharp image. So if you take off the killflash you can't have a front cap. The other tiny issue is that the rear cap really has to be pushed on as hard and tight as you can get it since the eye relief is so short already, if you don't have it snug all the way it'll bop you in the eye sometimes due to the added thickness. Now if you have it on all the way like I just described, the cap no longer snaps shut without a lot of force, not a big deal, but it's noticeable. Finally, I'll say that on mine I have the rear cap positioned so it opens towards the 3 o'clock position because otherwise the hinge tends to hit my eyebrow when shooting. You could try 6 o'clock too, but then it gets in the way of the charging handle. All that said I'd get the M150 because it comes with all the neat stuff that you'll want to try out at some point, even if you end up taking it off later, it's nice to have. MSRP shows a $50 difference between the two, which seems like a lot for two plastic caps, but keep in mind that ACOG's always seem to be available for quite a bit off MSRP. I saw the M150 at Sportsmans Warenhouse for $1250, and I got mine for a couple hundred less than that so I figure the actual difference between the two models will be more like $25-30 or so. I almost forgot, I believe that the stated weight is incorrect on Trijicon's website. I can't tell a difference in weight between the two models, it must be a typo? As a side note, the little additions on the RCO models are really nice. The cap lanyards are great to have on there. Also, the elevation and windage knobs can be adjusted by hand without a tool (or coin) which is also great. Hope this helps! Rob |
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Thanks for the pics and detailed info. Helpful people make this a great place to visit.
What about the rectecele. Are the horizontal lines on the side for ranging or just to draw the eye? I read elsewhere that the parallax is set for 300 yards. Guess I'll finally have to learn what parallax means. |
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Quoted:
Thanks for the pics and detailed info. Helpful people make this a great place to visit. What about the rectecele. Are the horizontal lines on the side for ranging or just to draw the eye? I read elsewhere that the parallax is set for 300 yards. Guess I'll finally have to learn what parallax means. Those lines are "stadia" lines and are spaced a 5 mil's each (google that one). Trijicon says they are for small unit communication, for normal folks it's just neat - but I do find that they are useful to make sure your rifle is level when you check the lines against the horizon. |
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