Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Enjoy free shipping during the holidays! Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC and to all U.S. Military APO/FPO/DPO addresses.

Enjoy Our Extended FREE RETURNS

We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later). We'll even cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Questions & Answers
which correct mount will I need to mount a Vortex Razor HD gen II-E on a Scar 17S? Expert Answer

You would need the 30mm model because the Vortex Razor is a 30mm tube diameter.

by Armando R., Gear Expert, May 30, 2019
What is the max. distance between the rings (30mm version)? Expert Answer

Maximum possible distance between the two rings is 3.82".

by Armando R., Gear Expert, May 30, 2019
Customer Reviews
Helpful Positive Review
Great unique product by AT, Verified Owner, May 31, 2023
I use these for my MDRx so I can swap optics quickly in addition to swapping calibers. The system works very well and seems very stable. I would definitely recommend this system to anyone that wants to be able to remove/add optics easily and quickly.
1/1 found this helpful
Helpful Positive Review
Mrex side lock heaven!!! by Swedishauto, Verified Owner, February 25, 2024
These mounts are the best made return to zero QD mounts really all angles covered can't find a weakness and worth every penny!!
3/3 found this helpful
Helpful Positive Review
Very Robust by Corey, November 29, 2024
If weight on your rifle is not a concern and you want a heavily built mount this is for you. The construction is thick rings with steel indexing pins on cantilever. The release mechanism is self-tensioned, so do not know yet the longevity.
1/1 found this helpful
Helpful Positive Review
rock solid, easy on/off by The Chicken Master, Verified Owner, January 30, 2017
Awesome mount. Easy to put on and take off. Rock solid when attached. Another reviewer stated it seemed loose, but keep this in mind...as it comes out of the box, the lower half of the rings are attached loosely to the mount, and the upper half of ...
Read More...
11/11 found this helpful
Helpful Positive Review
SIDELOK Sope Mount 30mm by Crazy Med1c, Verified Owner, March 6, 2019
I currently have this mounted on a modified SCAR 17(.308)with a HANDL defence SCAR-25 mod 2 Lower and a K.D.G rail I have put only 275 rounds threw it with this scope mount and it is working well , the Scope I am Using is a Vortex Razor HD-E Gen 2. ...
Read More...
3/3 found this helpful
Helpful Positive Review
I bought this with the intention of using it on a true multi-caliber rifle. As such I needed something QD with an absolute return to zero. The only review of the mounts R-T-Z was from KDG at 25 yards using a red dot and 10 round groups. I was not con...
Read More...
5/5 found this helpful
Read All 18 Reviews

Save on Kinetic Development Group Products this Holiday Season!

$34.67 Instant Savings Applied
Get up to a 14% savings instantly when purchasing this product before December 18th, 2025! Sales price already reflects these instant savings!
In Stock
3 Models Available

Show with deals only:

Instant Savings
Tube Diameter
All
Ring Height
All
Condition
All
Condition Quality
All
Condition Details
All
Search

Product Info for Kinetic Development Group SIDELOK Cantilever Modular Mount Scope Rings

Firmly mount your favorite optic to your rifle by using these Kinetic Development Group SIDELOK Cantilever Modular Mount Scope Rings. These One Piece Rifle Scope Mounts built by Kinetic Development Group feature a user-friendly, tool-free design that lets you easily install these without complicated or proprietary tools. On this Kinetic Development Group SIDELOCK Modular Optic Mount, you'll find recessed dots that act as witness marks for simple, accurate installation. Both the front and rear rings are CNC machined and wire EDM cut to ensure proper alignment. There's plenty of adjustments located throughout to customize the fit, and the integrated track system lets you install separate rings in case you change optics, which saves a lot of money since the base mount is the most expensive piece of these types of mounts. Install this Kinetic Development Group SIDELOCK Rifle Scope Mount today for a sturdy mounting platform that will withstand the recoil of your rifle while delivering precise shots down range.image

Specifications for Kinetic Development Group SIDELOK Cantilever Modular Mount Scope Rings:

Manufacturer: Kinetic Development Group
Length: 5.98 in
Weight: 9.4 oz
Finish: Black Type 3 Hardcoat Anodized

Features of Kinetic Development Group SIDELOK Cantilever Modular Mount Scope Rings:

  • Toolless design
  • User removable cantilever bar, in which the rings securely mount
  • The matched front and rear rings are CNC machined, and wire EDM cut
  • Witness marks for assembly in the form of recessed dots
  • Track system allows the user to purchase and install separate rings in the future
  • Black Type 3 Hardcoat Anodized

Package Contents:

  • Kinetic Development Group SIDELOK Cantilever Modular Mount Scope Rings

Kinetic Development Group SIDELOK Cantilever Modular Mount Scope Rings Orderable Models

List of Orderable Models

  • Kinetic Development Group SIDELOK Cantilever Modular Mount Scope Rings, 30mm, SID5-140 , MPN: SID5-140 , UPC: 851064007173 , Code: 2A4-SCM-SIDELOKC-SID5-140
  • USED, Kinetic Development Group SIDELOK Cantilever Modular Mount Scope Rings, 34mm, SID5-141 , MPN: SID5-141-EDEMO , Code: 2A4-SCM-SIDELOKC-SID5-141-EDEMO-RE-B
  • Kinetic Development Group SIDELOK Cantilever Modular Mount Scope Rings, 34mm, SID5-141 , MPN: SID5-141 , UPC: 851064007197 , Code: 2A4-SCM-SIDELOKC-SID5-141

Kinetic Development Group SIDELOK Cantilever Modular Mount Scope Rings Unavailable & Discontinued Models

List of Unorderable Models

  • USED, Kinetic Development Group SIDELOK Cantilever Modular Mount Scope Rings, 30mm, SID5-140 , MPN: SID5-140-EDEMO , Code: 2A4-SCM-SIDELOKC-SID5-140-EDEMO-IN-D
  • USED Kinetic Development Group SIDELOK Cantilever Modular Mount Scope Rings, 30mm, SID5-140, EDEMO5, Condition Parts Only/Salvage, Defective , MPN: SID5-140-EDEMO5 , Code: 2A4-SCM-SIDELOKC-SID5-140-EDEMO-DF-F
  • USED, Kinetic Development Group SIDELOK Cantilever Modular Mount Scope Rings, 1in, SID5-142 , MPN: SID5-142-EDEMO , Code: 2A4-SCM-SIDELOKC-SID5-142-EDEMO-SC-C
  • USED Kinetic Development Group SIDELOK Cantilever Modular Mount Scope Rings, 30mm, SID5-140, EDEMO7, Condition Fair, Scratches , MPN: SID5-140-EDEMO7 , Code: 2A4-SCM-SIDELOKC-SID5-140-EDEMO-SC-D
  • USED, Kinetic Development Group SIDELOK Cantilever Modular Mount Scope Rings, 30mm, SID5-140 , MPN: SID5-140-EDEMO , Code: 2A4-SCM-SIDELOKC-SID5-140-EDEMO-RE-B
  • DEMO, Kinetic Development Group SIDELOK Cantilever Modular Mount Scope Rings, 30mm, SID5-140 , MPN: SID5-140-DEMO , Code: 2A4-SCM-SIDELOKC-SID5-140-DEMO
  • Kinetic Development Group SIDELOK Cantilever Modular Mount Scope Rings, 1in, SID5-142 , MPN: SID5-142 , UPC: 851064007180 , Code: 2A4-SCM-SIDELOKC-SID5-142
Compare (0)