scope rings

[jimbo74]

Picked up a vortex crossfire 2 2-7x 32 dead hold bdc for an AR15-22lr build. Scope is not the rimfire one, but a centerfire scope. What rings should I get to mount it? Also, where is the best place to mount it? Build will be m4 stock, and 16" barrel with a 13.5" mlok rail.


Looks like is a 1" tube? That is what I gathered from the vortex site

[devster55]

I would get a standard ar15 scope mount. I like the aero light weight mount but this one works as well.

https://www.opticsplanet.com/burris-ar-tactical-mounts.html

[kcheung2]

I used to like the PEPRs in the link above, and while they are still perfectly fine mounts I think they're too clunky & heavy. Nowadays I use either Aeroprecision or Warne gen 2 for the best price/quality mix. For higher end setups there's ADM, Bobro, and others. I shy away from QD mounts because it's an extra feature that adds cost but isn't something I'll ever use. Also because QD mounts that can truly return to zero require really good machining tolerances, something not likely to be found on budget mounts.

As for where to mount it, shoulder your (unloaded) gun as usual, place the scope on top & adjust it where you get the best sight picture. Take note of the scope location & place the mount accordingly. It may take 3 hands to do that though. If you want to short-cut the process, generally scopes end up with the rear portion directly over the back of the charging handle. Cantilever mounts generally have the front portion of the base about 1-3 picatinny notches behind the front of the upper receiver, with the forward ring overhanging the handguard/receiver gap. And note that the rings lean FORWARD.

[jimbo74]

Are there different heights of the mounts? Or anything that fits the 1" is fine?

[kcheung2]

The cantilever AR mounts are all standardized to cowitness with a front sight post, 1.4 inches which is equivalent to extra high rings. Anything that fits a 1 inch tube will work.

[Ajlopez281]

Awesome info. I was thinking the same question as the OP.


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[jimbo74]

I don't have a fsb, so does it matter what height I get?

[kcheung2]

If you chose to get 2 piece rings, theoretically it doesn't matter what height you get, provided:

1) your scope's objective bell has sufficient clearance
2) can get the appropriate cheek weld

In practice, unless you have an exceedingly tiny face & starvation-level cheeks then the best cheekweld will be with extra high mounts. The reason why ARs are designed with front sights at that specific height is because that's the best fit for most people.

With 2 piece rings there's also the potential problem of mounting the front ring on the handguard. If that handguard should twist even a little, it will create stress on the scope tube & you'll be off zero.

The 1 piece cantilever mounts eliminate both the issue of height and keeps everything mounted on the upper receiver only.

[ChuckDizzle]

I've got a lightly used Warne Skelemount II if you would like to negotiate a fair price.

[Sir Toast]

Get a standard Vortex AR-15 mount. Or a Burris. Or a Warne.

[jimbo74]

So the 1 piece cantilever mounts are already the correct height? Or are there multiple heights?

This is my first scope. I definitely don't have starvation cheeks. This gun is actually for my daughter, she doesn't have starvatuin cheeks either, lol

My other ar15 has absolute co witness with a fsb, trs25, and a magpul rear bus

[ChuckDizzle]

So the 1 piece cantilever mounts are already the correct height? Or are there multiple heights?

This is my first scope. I definitely don't have starvation cheeks. This gun is actually for my daughter, she doesn't have starvatuin cheeks either, lol

My other ar15 has absolute co witness with a fsb, trs25, and a magpul rear bus

If you have used these previous sights the cantilever one piece will feel right at home for you.

[kcheung2]

Yes the cantilever mounts are already at the correct height.

This is a different topic altogether, but post #7 has a picture which shows the mounting location that works for most people. The rear of the scope lines up with the back of the charging handle, and the bottom front of the mount is about 2 notches back from the front of the receiver.

http://www.calguns.net/calgunforum/showthread.php?t=1460983

[jimbo74]

How does this one look?

https://www.amazon.com/dp/B06X9GNNR1/ref=cm_sw_r_em_apa_W6lqBbSA3CHZJ

[jimbo74]

I picked up a 525 round value pack of Federal Champion in a blue box, says it is copper plated, hollow point, 36 grain

so that mount from amazon is cool?