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Discussion Starter · #1 ·
Just picked up the SP5K yesterday. WOW she's a beauty. Getting ready to do the Form 1 for the folding stock and vertical foregrip I'm buying another Aimpoint Micro T-2 cause they are king of red dot scopes. What height mount do I need to clear the front sight? I don't care about cowitness.

This is the setup I'm looking at.

Aimpoint Micro T-2 2MOA/M4 QD Mount Combo | LaRue Tactical
 

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Priest of the P7
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Do you want to clear the sightpost or the whole sight altogether?
 

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LOW SPEED, HIGH DRAG
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FYI, the LaRue LT-661 (short) / T-2 combo with a BT-21241 mount puts the dot exactly halfway between the top of the front sight post and the front sight hood. This is looking through the tube, absolutely centered. If you scrunch way down and look through the bottom of the tube, you can just barely get an absolute cowitness through the irons with the dot on the front sight blade tip, but it's unusable for actually shooting.

The LT-661 is the lowest LaRue QD base, and I believe the BT 21241 (and the shorter 10266) is the lowest mount you can get for a SP5K. If you can get an absolute cowitness with a QD mount and a T-2, I haven't found it.
 

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FYI, the LaRue LT-661 (short) / T-2 combo with a BT-21241 mount puts the dot exactly halfway between the top of the front sight post and the front sight hood. This is looking through the tube, absolutely centered. If you scrunch way down and look through the bottom of the tube, you can just barely get an absolute cowitness through the irons with the dot on the front sight blade tip, but it's unusable for actually shooting.

The LT-661 is the lowest LaRue QD base, and I believe the BT 21241 (and the shorter 10266) is the lowest mount you can get for a SP5K. If you can get an absolute cowitness with a QD mount and a T-2, I haven't found it.
Some Data:

Factory H1 mount - 18mm (~0.71") optical height

Bobro Low - 0.8"
Aimpoint LRP - 20mm or 0.75"
LT661 - 0.84"

Maybe the Aimpoint LRP would be close enough? That 20mm number is from the newer LRP mount, currently on the Aimpoint site. Scuttlebutt says the older LRP one was lower.
 

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I like the Trijicon RMR optic on my MP5's and K's instead of the Aimpoint H1 because of the compact size. I wish B&T, UTG or MFI would make a mount that did not have picatinny rails/slots and was lower, flat and made for a RMR or any of the other micro optics to mount directly. That would lower the optic and provide a true co-witness based on my measurements. Here are pic's of one of my RMR's with a LaRue QD on a B&T Rail.



 

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I like the Trijicon RMR optic on my MP5's and K's instead of the Aimpoint H1 because of the compact size. I wish B&T, UTG or MFI would make a mount that did not have picatinny rails/slots and was lower, flat and made for a RMR or any of the other micro optics to mount directly. That would lower the optic and provide a true co-witness based on my measurements. Here are pic's of one of my RMR's with a LaRue QD on a B&T Rail.



Nice setup! Do you know how high the "Low Picatinny" RMR mount from Trijicon will sit? I'm considering it for my SP5K.
 

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I have been shopping the Trijicon MRO as another option.. anybody have that? there is a hi mount and a low mount and I am suffering the same dilemma for my SP5K, Hi or low mount? cowitness or clear the sites?
 

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The Librarian
MP5-N and HK23E-K
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Could you please provide the manufacture/model/reference link for this mount and raiser? And maybe another picture showing the complete side view of the weapon? Thank you!


I use the Aimpoint raiser block and quick detach mount. Works perfect and clears the front sight.
 

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The Librarian
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Got it. If you clear the front sight tower, than you won't get a cowitness. As far as a cowitness options goes, the B&T mounts just don't do it for me, which is why I'm going with the RMR mount option in that group buy.
 

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I will think about this over the weekend.. I am not totally out on the group buy option.. Like I said, its a dilemma and I dont want to buy stuff I wont use.
 

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The Librarian
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No problem. I'm keeping the group buy open for a bit and will also be adding a picatinny rail option for the aimpoint micro. I'm hoping to get pics up soon.
 

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Firearm Gun Trigger Assault rifle Rifle

This is mine with the Trijicon MRO with their low mount on the factory HK rail for reference for anyone who may be interested. It co-witnesses with the dot right on top of the front sight post set up this way. Unfortunately, I do not have a picture through the sight yet.
 
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