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Monstrum Lockdown Series Adjustable Height Picatinny Riser Mount with Quick Release | 2.5 inch

4.5 4.5 out of 5 stars 2,087 ratings
$15.95
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Purchase options and add-ons

  • 100% Weave
  • Picatinny riser mount for use with Picatinny or Weaver base optics
  • Innovative patent pending adjustable height design allows for optimal placement of your optic based on rifle setup or preferred cheek weld
  • Riser can be adjusted incrementally via two locking screws from 0.87 of rise up to 1.14 inch of rise, measured from rail surface to rail surface
  • Attaches and detaches quickly and securely via adjustable tension quick release mechanism
  • Available in 3 Slot/1.75 inch, 5 Slot/2.5 inch, 7 slot/3.5 inch, or 13 Slot/5.75 inch versions for application with all scopes, red dots, and optics
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Monstrum Lockdown Series Adjustable Height Picatinny Riser Mount with Quick Release | 2.5 inch
This item: Monstrum Lockdown Series Adjustable Height Picatinny Riser Mount with Quick Release | 2.5 inch
$15.95
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Sold by Monstrum Tactical and ships from Amazon Fulfillment.
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LONSEL Picatinny Riser Mount, Low Profile Rail Riser Mounts Adaptor with QD Lever Lock Quick Release & 5 Slots Picatinny Rail
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Monstrum Lockdown Series Adjustable Height Picatinny Riser Mount with Quick Release | 3.5 inch
$16.95
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    About Us:

    Monstrum is the leading manufacturer of affordable, high quality rifle optics and accessories. We have over 15 years of experience in engineering and manufacturing scopes.

    Our optics are designed to provide superior performance in any environment. Whether you’re hunting in the woods or shooting at the range, we have the perfect scope for you.

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Product Description

MONSTRUM TACTICAL OPTICS ACCESSORIES SCOPES RUGER MOSSBERG

MONSTRUM TACTICAL RISER MOUNT

Our exclusive adjustable height design allows for absolute precision placement of your optic based on your rifle setup or preferred cheek weld! The riser can be adjusted incrementally via two locking screws from 0.6 inches up to 1 inch of rise, measured from rail surface to rail surface.

Adjust the height of your optic in increments of 0.03 inches.

MONSTRUM TACTICAL RISER MOUNT

Crafted from lightweight 6061 aluminum, the mount weighs in at a mere 4.5 ounces!

At a weight comparable to a set of lightweight rings, it provides the added rigidity and convenience of a one piece mount.

MONSTRUM TACTICAL RISER MOUNT

Adjustable Height Riser Mount

Built for use with Picatinny or Weaver base optics, our mounts will give you just the right amount of rise for optimal scope positioning and clearance over your front sights. It accepts all Picatinny or Weaver based scopes, red dots, or optics

Buying Options
Customer Reviews
—
Price —
Base Length: 2.38 in
Base Width 1.25 in
Rail Length: 2.38 in
Slots: 5
Lowest Profile: 0.88 in
Highest Profile: 1.13 in
Increments: 0.03 in
# of Settings: 8

How to Adjust Riser Mount Height

MONSTRUM-TACTICAL-ADJUSTABLE-HEIGHT-RISER-MOUNT

Loosen the Locking Screws

Loosen the two locking screws located on the side of the riser mount.

MONSTRUM-TACTICAL-RISER-MOUNT-ADJUSTABLE-HEIGHT-INSTRUCTIONS

Pull Up on the Rail

Pull up on the rail, which will allow you to adjust the height in increments of 0.03 inch.

Note: It may be easier if you first mount the riser mount on to your rifle.

MONSTRUM-TACTICAL-ADJUSTABLE-HEIGHT-RISER-MOUNT-INSTRUCTION

Tighten the Locking Screws

Hand-tighten the locking screws to around 15 in-lb or 1.25 ft-lb.

Note: We always recommend using blue threadlocker whenever there is threading to prevent loosening of screws.

MONSTRUM-TACTICAL-ADJUSTABLE-HEIGHT-RISER-MOUNT-INSTRUCTIONS

Done!

Now you can mount your optic, if you have not already.

3 Slot Adjustable Height Riser Mount
5 Slot Adjustable Height Riser Mount
7 Slot Adjustable Height Riser Mount
13 Slot Adjustable Height Riser Mount
Customer Reviews
4.6 out of 5 stars 547
4.5 out of 5 stars 2,087
4.5 out of 5 stars 892
4.5 out of 5 stars 300
Price $14.95 $15.95 $16.95 $18.95
# of Slots 3 5 7 13
Base Length: 1.55 in 2.38 in 3.13 inch 5.50 in
Base Width: 1.25 in (1.75" total w/ locking lug) 1.25 (2.13" total w/ quick release mount) 1.25 (2.13" total w/ quick release mount) 1.25 in (1.75" total w/ locking screw)
Quick Release? ✓ ✓
6061 Aircraft Grade Aluminum? ✓ ✓ ✓ ✓
Heat-Treated Locking Mechanism? ✓ ✓ ✓ ✓
Integral Recoil Stops? ✓ ✓ ✓ ✓
Ideal For: Red Dots Red Dots, 1x Prism Scopes Red Dots, Prism Scopes, Compact Scopes Near-Mid Range Scopes, FFP Scopes

Product information

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Monstrum Lockdown Series Adjustable Height Picatinny Riser Mount with Quick Release | 2.5 inch

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Customer reviews

4.5 out of 5 stars
2,087 global ratings

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Customers say

Customers find the product works well and provides good value for the money. They appreciate its adjustable height and ease of installation. However, some customers have mixed opinions on its sturdiness and fit.

AI-generated from the text of customer reviews

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Works greatAdjustment capabilityValue for moneyEase of installationLock tightnessMount qualitySturdinessFit
102 customers mention "Works great"102 positive0 negative

Customers like the product. They find it convenient and workable, with a good quality and value. The QD function works well to hold the mount securely to the rail. Some mention the clamp mount adjustment is super sensitive. Overall, customers are satisfied with the product's performance.

"I received this in good time and good condition. I do have to address the comments regarding its ability to stay on/tight...." Read more

"...first unit, and I put that on my plinker, and that has been working fine without issues." Read more

"...was able to connect it to my AR with no problem easy on and off and good quality." Read more

"...The quick release is a very nice option and is very sturdy when locked down and it will not move or ever come loose...." Read more

56 customers mention "Adjustment capability"44 positive12 negative

Customers appreciate the adjustable height of the product. They find it secure and comfortable, allowing them to co-witness their optics with their iron sights. The tension on the locking mechanism can be adjusted if it's too tight.

"...release makes it easy to remove if my optic fails, the increased height for my optic makes is so much more comfortable to shoot" Read more

"...The adjustable riser is also a very nice option to have if I decide to purchase more scopes in the future and need to adjust the height of the riser..." Read more

"...I like the idea that you can adjust the height, it has a quick detach, is very well priced, and best of all: my EoTech EXPS 2 will fit onto it...." Read more

"...At first I thought the adjustable riser system was a bit odd, but considering that I got 2 rails with the aim at creating a quick detach system for..." Read more

47 customers mention "Value for money"41 positive6 negative

Customers find the product offers good value for money. They say it's well-made for being inexpensive, a decent option for lifting your dot off of the rail, and an economical QR rail mount.

"...idea that you can adjust the height, it has a quick detach, is very well priced, and best of all: my EoTech EXPS 2 will fit onto it...." Read more

"...This is a great price, but I am sure it's manufactured in Asia...." Read more

"...Greats value and haven't needed to expand the unit but it is a great feature to have. Will but more for other systems." Read more

"...Otherwise, it seems to be a decent build for the money." Read more

27 customers mention "Ease of installation"27 positive0 negative

Customers find the product easy to install and use. It allows height adjustment and is simple to connect to their AR. The quick release setup is convenient if you like to use iron sights as well.

"easy to install and the quick release makes it easy to remove if my optic fails, the increased height for my optic makes is so much more comfortable..." Read more

"Easy to use and adjust. My Sig Romeo 5 pairs up nicely with it." Read more

"I was able to connect it to my AR with no problem easy on and off and good quality." Read more

"...This is exactly what I needed, and is almost adjustable. While very easy to install, it seems the leverage lever that you use to add/remove from..." Read more

24 customers mention "Lock tightness"18 positive6 negative

Customers appreciate the lock tightness of the product. They find it sturdy and easy to install, attaching securely to the Picatinny rail. The mount stays locked down after several rounds, and all screws seem secure. It holds their red dot firm and is very steady.

"...nice option and is very sturdy when locked down and it will not move or ever come loose...." Read more

"...250 rounds through the rifle on the second range trip and all screws seems secure...." Read more

"...When properly adjusted, the latch will begin to close and then at just the point where it seems like it won't close any more, the latch will..." Read more

"...quick release handle allows you to adjust the tension needed to NEVER LOOSEN UP. It’s well made and at that price you can’t beat it...." Read more

21 customers mention "Mount quality"21 positive0 negative

Customers are pleased with the mount quality. They find it versatile, easy to install, and well-made. Some mention rust on the lock pin but it mounted just fine.

"...I like the Riser feature of the unit. it allows me to use it without taking the stock sights off my gun. Would definitely buy again...." Read more

"It is a solid mount and the adjust-ability is nice. I think I will have problems though until I grab some loctite to secure the screws once adjusted...." Read more

"...Very pleased with this versatile mount." Read more

"...issue is looks like a little bit of rust on the lock pin but mounted just fine." Read more

57 customers mention "Sturdiness"35 positive22 negative

Customers have mixed opinions about the product's sturdiness. Some find the construction sturdy and adjustable, with a locking mechanism that doesn't collapse under weight. Others mention it's wobbly but not unmanageable, and the riser doesn't hold together well when shooting. The device becomes loose after about 60 rounds through an AR pistol, or breaks the first day used.

"...The quick release is a very nice option and is very sturdy when locked down and it will not move or ever come loose...." Read more

"...The only thing is that the riser does not hold together well when shooting. I tried zeroing my rifle and after 10 shots it comes loose...." Read more

"...I was pleasantly surprised by the sturdy construction, and the ability to adjust tension via a threaded nut that is toothed to lock into the riser..." Read more

"It is a solid mount and the adjust-ability is nice. I think I will have problems though until I grab some loctite to secure the screws once adjusted...." Read more

36 customers mention "Fit"22 positive14 negative

Customers have different experiences with the fit of the product. Some find it perfectly suited for an AR-15 rifle and the perfect size to raise their dot scope over the front sight. Others mention that the mount does not stay tight, fits loosely on picatinny rails, and shakes too much when not tightened properly.

"...able to pair this with Monstrum Marksman 3x30 scope, and that scope is a big boi, on my Ruger 556...." Read more

"...Tightened it down but after some more shooting, it becomes loose again. I think this would definitely be better for airsoft but not for anything else." Read more

"Correct fitment." Read more

"Perfect fit !" Read more

Great quick detach rail for the price!
5 out of 5 stars
Great quick detach rail for the price!
First thing that I loved right away was that all parts are metal, no polymer based materials. At first I thought the adjustable riser system was a bit odd, but considering that I got 2 rails with the aim at creating a quick detach system for rifle scopes, I can easily see this coming in use with scopes that have larger lenses which would obviously require more elevated height to accommodate for them. SLIGHTLY disappointed in the system that tightens down the lever to the rail, but I'm sure with a little removable Loctight I can keep it set long term and not have to hassle with the adjustments anymore.
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Top reviews from the United States

  • Steve King
    5.0 out of 5 stars great mount for my Monstrum marksman,
    Reviewed in the United States on July 15, 2024
    Verified Purchase
    easy to install and the quick release makes it easy to remove if my optic fails, the increased height for my optic makes is so much more comfortable to shoot
    Helpful
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  • Grant L. Martin
    5.0 out of 5 stars Works great; Have installation note
    Reviewed in the United States on June 14, 2020
    Verified Purchase
    I received this in good time and good condition. I do have to address the comments regarding its ability to stay on/tight. To the untrained, adjusting the Quick Disconnect tension might not be readily apparent. It needs to be made with the nut and made in small increments. The tension adjustment is achieved by the nut opposite the latch. It needs to be tightened in increments of 1/8 turn or less. When properly adjusted, the latch will begin to close and then at just the point where it seems like it won't close any more, the latch will suddenly snap closed. You have to work up to this situation slowly. It will be obvious to the user where this occurs - At that point, there will be NO movement in the mount/rail at all. The point of "Creeping up" on the correct tension is that If you go too far, you risk breaking off one of the latch cam ears.

    Note: The inside lip of the nut that bears on the rail clamp is serrated like a lock washer. Make sure the clamp is completely open before turning the nut after the initial installation has been performed. If there is any pressure on the nut, then turning it will be VERY difficult and you WILL score the face of the rail clamp.

    1] To start, remove any sight on the mount, loosen latch and then the the nut all the way so you can drop the mount onto the rail.
    2] Set the latch to its closed position. The mount will still be loose on the rail.
    3] Using your fingers, compress the latch & mount clamps on the rail until the mount clamps are just gripping the rails. While clamped, tighten the nut finger tight. The mount should now stay on the rails with a little movement. It will still be loose but now secure to the point where it's not falling off.
    4] Now comes the iteration part: Release the clamp, hold the clamps to the rail and tighten the nut 1/8 turn. Now close the clamp and note that it easily closes. Repeat this "Unlatch-tighten nut-latch" process. As you do so, the tension will get greater and greater until you get to that point where the clamp just barely "Comes over the hill", it snaps closed, and the mount will be securely attached to the rail.

    Using Blue, non-permanent Loctite (#242) , should keep the tension right where you want it .

    I hope this helps
    65 people found this helpful
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  • Jet
    4.0 out of 5 stars Great Riser for the buck
    Reviewed in the United States on October 23, 2022
    Verified Purchase
    I was able to pair this with Monstrum Marksman 3x30 scope, and that scope is a big boi, on my Ruger 556.

    I initially had issue with the first riser loosing grip on the rails after 50 rounds, and it keep loosening up after each mag. Monstrum quickly sent me a replacement unit, and I’ve had zero issue with the second unit.

    I was able to keep the first unit, and I put that on my plinker, and that has been working fine without issues.
    Helpful
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  • 4th & 10
    5.0 out of 5 stars Great Product !
    Reviewed in the United States on February 15, 2025
    Verified Purchase
    Easy to use and adjust. My Sig Romeo 5 pairs up nicely with it.
    Helpful
     Report
  • Doug Dileonardo
    5.0 out of 5 stars Great mount!
    Reviewed in the United States on November 10, 2024
    Verified Purchase
    I was able to connect it to my AR with no problem easy on and off and good quality.
    Helpful
     Report
  • Brian
    5.0 out of 5 stars Highly recommended adjustable riser mount!
    Reviewed in the United States on November 17, 2022
    Verified Purchase
    Very happy first time customer with Monstrum Tactical and I am very pleased with my purchase! I mounted this adjustable riser mount to my rifle and I could not be any happier! The riser mount is very well made and the quaility of this riser mount is second none! The quick release is a very nice option and is very sturdy when locked down and it will not move or ever come loose. The adjustable riser is also a very nice option to have if I decide to purchase more scopes in the future and need to adjust the height of the riser to meet my needs. Highly satisfied and I will be making more purchases with Monstrum Tactical and I highly recommend them to anyone looking to upgrade any firearm!
    One person found this helpful
    Helpful
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  • Keoki
    3.0 out of 5 stars Does not hold zero
    Reviewed in the United States on September 22, 2022
    Verified Purchase
    First, I wanted to say that this isn't that bad of a riser alternative. I like the idea that you can adjust the height, it has a quick detach, is very well priced, and best of all: my EoTech EXPS 2 will fit onto it. The only thing is that the riser does not hold together well when shooting. I tried zeroing my rifle and after 10 shots it comes loose. Tightened it down but after some more shooting, it becomes loose again. I think this would definitely be better for airsoft but not for anything else.
    3 people found this helpful
    Helpful
     Report
  • Jikkity Jackity
    5.0 out of 5 stars Love these!!!
    Reviewed in the United States on September 6, 2024
    Verified Purchase
    Worked perfectly to get the height between my red dot, and the magnifier matched up. These are wonderful. Monstrum is always where I look first!
    Helpful
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Top reviews from other countries

  • grannygates
    5.0 out of 5 stars Exactly what we needed
    Reviewed in Canada on July 13, 2024
    Verified Purchase
    We needed to bump up the sight an inch to make it more comfortable. This was exactly what we needed. Arrived promptly and exactly as described. Very happy with the product and the seller :)
    Report
  • N. Penney
    1.0 out of 5 stars Screws stripped
    Reviewed in Canada on March 27, 2024
    Verified Purchase
    One screw stripped easily... not impressed
    Report