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Discussion Starter #1 (Edited)
I'm in the process (more like waiting for my Form 1 to be returned approved) of building my PS90 into an SBR. I've looked at the optic choices available for the rifle and have decided on a Trijicon ACOG. I've already ordered an ACOG mount from Mark at TROSUSA but here's my dilemma - hardly any of the local shops carry the ACOG sight so I'm disadvantaged in that I can't actually take a peek through several models. I'm looking (online) at the 1.5X16S, 1.5X24 and the 2X20 models - I'm leaning towards the 2X20 just for the extra magnification. I feel that green is the way to go but I am open to suggestions for other colors. I have shot rifles with conventional scopes using crosshairs for many, many years so I am most comfortable with that set-up. Anyone have experience with the "ring and dot" reticle or the triangle reticle? Any advantages or disadvantages to one or the other? Originally, I was set on the 3X30 with the green Chevron .223 ballistic reticle but Mark discouraged that choice due to the limited eye-relief of the model. Any thoughts or suggestions on power choice or reticle would be greatly appreciated!
 

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First of all, the only color I would consider is Green. The eye sees green better than any other color. As too which model, I think that Mark would be the best person to recommend which ACOG.

I'm beginning to realize that Mark has probably forgot more about the PS90 than I will EVER know.
 

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Discussion Starter #3 (Edited)
PursuitSS,

I concur with both of your observations - green is the best color for the reticle, and Mark probably has forgotten more about the PS90 than most US will EVER know. LOL!

The 1.5X16S offers only the "Ring & Dot"reticle in all colors - red, amber and green. The 1.5X24 offers Triangle and Crosshair reticles but no green color choice. The 2X20 carries the Dot and Triangle reticles in amber and red only, with the Crosshair reticle being offered in all colors. Mark stated that: "I do not recommend using above 2x as the eye relief can be an issue. 1.5x is great for anyone, 2x is OK but you do have to be careful of where you place your head. 3x is probably not going to be satisfactory, for most people." In all reality, I'm looking for folks that have experience with the ACOG - I'm thinking that I might be missing something by not considering either a Triangle or Dot reticle as a choice?
 

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just trying to figure which one would be best for me at the moment. 2X is tempting but can someone explain "2x is OK but you do have to be careful of where you place your head." short eye relief or what?
 

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Try to find a mini agog to look through first, they have very little field of view and your eye has to be very close to the optic. I think the T-1 is the way to go, or if you like an RMR or MRO. I was sent a 1.5x mini to look at once and they wanted a low mount made for it. After going over it with him, he went with a reddot. I won't make something Mark already has anyway. Remember what this rifle is for, with a good reddot set up low to get a good cheek weld you enhance the rifle and it's strengths. A powered optic will only help after aprox. 100 yards or so, a place where the rifle was not really designed to go. To best use this system, I like a small dot (1 or 2 moa) a large FOV, and mounted low enough to get a good cheek weld. This is only my opinion and I just want you to know the good and the bad because those little sights are pricey. Try to get ahold of Mjk1 and ask him about these sights. Good luck with whatever you deside.
 

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thanks, yeah I hear lots from both sides, many have said it's the best sight for the ps90, many don't like it, definitely going to try and find one first. thanks for your input fullcase
 

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I went with the TA45 myself. Would have preferred the green but for some reason it's not offered. The eye relief and the objective size is what sold me. I also went with the triangle reticle and it's worked well for the short range, self defense usage SBR is for. 100 yards is still very easy shooting with the triangle.
 

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really need to find someone in the area who has one, mark your in Clackamas, I make it over to Portland occasionally would you consider meeting so I could check it out? cabelas has the larger acogs but that won't help me much, maybe get lucky an find one in their gun library.
 

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I'M IN NORTH COAST OREGON, from what i've read the 2x ( which is what i'll probably go for) TA45, is as large as you can put on a ps90 without eye relief problems...which is weird because the catalog trijicon sent me says the 6x has more eye relief (2.7 in.) than the 2x ( 2inches) most are around 2 inches. does the low mount work for it?
 

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The TA45 is 1.5x and has 3.6 inches of eye relief as compared to the TA47 2x with only 2.1 inches. That's another reason the TA45 is a better choice for the PS90, the eye relief is a big deal on the little bullpup. There's also the 24mm objective vs the 20mm so light transmission will be better on the TA45 also.
 

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it did, surprising how good it was. might just get that one since it;s what I was able to try. It was red but I've always found green was way more visible in daylight, strange that more red dot sights aren't green instead.
 

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After years trying to make Ring Sight work for me I have had it.

I have decided to go with a 1.5X ACSS Green Trijicon ACOG. There are so many models and model numbers I need help.

I will be going with Mark Willis' mount for it.

Which model and model number do I want to order for my PS90?
 

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After many years of swapping optics I have settled on running a MRO ( green) and a T1 on both of my preferred PS's. I had TA44 Green for a while but never came to peace with it. Personally ....the TA 44,45,& 47 all have mitigating specs.... the more eye relief the less the FOV. Then add the magnification of the factor in and the geometry of the optic itself. IE: I always felt like "if I dropped it just right" I would damage something !! ( I have THAT kind of luck ) but with trying to adapt it to my Tri Rail ....I always felt like the ACOG ends were just sticking out unprotected .
To me.... the mount in the center being the only option ...I finally gave it up , no matter how much I wanted an ACOG on that weapon.

I even asked Design Machine to look at an over engineered mounting idea I had ... but they too agreed the work required to make a 1 off mount exceeded the expense.
Needless to conclude I really wanted the 44 on 1 of my weapons.


Generally speaking I could deal with 1.5X mag ... but will primarily only use the platform for close range .With that said.... and with my declining vision .... my poor eye's will have to suffice.

Purely my opinion and is not meant to discourage the use of the 44,45 & 47.
For me it turned out to be about "balance".( weighing all the factors)

I do have various other optics on my other pieces but I'm not grabbing any of those "in a pinch"!!
 

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Someday I'm gonna mount up a proper hunting scope with adjustable parallax down to 10 yards. Just have to find the right mount and a scope with a incredible eye box.
 

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Idea! I may take this to the scope guru. Anybody care to work with Cyclops Joe Rhea in Texas on solutions?

I have wanted to visit him and spend some time picking his brain, watching midget porn and just having a good time. He's real down to earth and has an incredible sense of humor. My newest optics would probably give Joe such a hard on that I think he might entertain the idea of a series of videos on optics for the PS90.
 
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