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FAB Defense M4 R10/22 Collapsible Folding Stock Conversion Kit
Want your Ruger 10/22 to fit like a modern carbine? The FAB Defense M4 R10/22 conversion kit replaces the factory stock with a side-folding, 5-position collapsible setup and built-in rail space for lights, grips, and other 1913 Picatinny accessories. It’s a fast way to get adjustability for different shooters, different positions, or bulky outerwear without changing rifles.
What makes this kit different
- Left-side folding stock for compact storage and transport
- 5-position collapsible length adjustment to dial in length of pull
- 1913 MIL-STD Picatinny side and lower rails for accessory mounting
- QD sling swivel sockets on both sides for easy sling setup
- Fiberglass-reinforced polymer construction for a strong, lightweight build
- Ergonomic grip geometry with finger grooves and a shaped backstrap for solid control
Compatibility
- Designed for Ruger 10/22 platforms
- Commonly listed as compatible with standard and bull-barreled 10/22 builds
- Accessory rails accept 1913 Picatinny-based accessories
Specs
- Length of pull range: approximately 13.11 to 15.94 inches
- Weight: approximately 37.5 oz (about 2.34 lb)
- Overall length (collapsed configuration reference): about 19.29 inches
Color options
Available in Black, Olive Drab Green, and Desert Tan depending on the variant you choose.
FAQ
Is this the folding, collapsible version?
Yes. This model is commonly listed as a left-side folding stock with a 5-position collapsible length adjustment.
Will it fit a bull-barreled Ruger 10/22?
Many retailers list it as compatible with standard and bull-barreled 10/22 rifles. If you have a bull barrel or a less common 10/22 variant, double-check fit notes before ordering.
What accessories can I mount to the rails?
The side and lower rail sections are 1913 MIL-STD Picatinny, so any accessory designed for that rail standard is the intended match.
What sling mounting does it support?
The kit is commonly listed with QD sling swivel sockets on both sides for flexible sling placement.
What’s the difference between this and the “Pro / optics-ready” versions?
This model is the M4 R10/22 style kit. Some product lines also offer optics-ready or Pro variants with additional features. If you’re comparing versions, confirm which one you’re buying based on the listing title and included rail setup.
WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to - www.P65Warnings.ca.gov.
Customer Ratings & Reviews
Ratings Snapshot
out of 5
5
(5)
4
(3)
3
(0)
2
(0)
1
(0)
Would recommend this product.
100%
out of 5
5
(5)
4
(3)
3
(0)
2
(0)
1
(0)
Would recommend this product.
100%
8 Total Reviews
- 1
Fab Defense Ruger 10/22
Sig
Location:
Date:
May 7, 2023
The stock has a nice fit and finish, and it feels great on the gun. I haven't had much chance to shoot it yet but will do so soon. I appreciate the enhanced appearance of the gun with this stock. Its adjustability will make it easier for my grandkids to learn to shoot the 10/22. A truly worthwhile addition.
Recommended
Great product!
Smith,
Location:
Date:
May 7, 2023
This stock met all my expectations, fitting perfectly and making the rifle more compact for packing. It appears sturdy enough to withstand outdoor wear and tear. I am delighted with my purchase and highly recommend it to anyone looking to upgrade their firearm.
Recommended
Pretty decent stock
Andrew
Location:
Date:
May 7, 2023
Once assembled, the stock has an impressive appearance, and the assembly process is quite simple. The only concern is a slight looseness around the barrel, but it's not significant enough to warrant a return. Be aware that shipping can take some time, so if you're not patient, consider ordering from an alternative source. Overall, I'm fairly pleased with the purchase and my experience with OpticsPlanet.
Recommended
Yes I would, several more times
Bill
Location:
Date:
May 7, 2023
I acquired this item recently and found the swapping process to be incredibly quick and easy, taking just about a minute and a half. It's fairly lightweight, which makes it more convenient to fit into a backpack. Had I discovered this product earlier, I would have bought it sooner. I'm now considering either recommending it to my grandchildren or purchasing some as birthday gifts for them.
Recommended
Great choice
Brian
Location:
Date:
May 7, 2023
The stock was prepared for immediate use straight from the box. Installation was incredibly straightforward. It snugly fits the rifle and has an impressive appearance. The polymer material appears highly durable and should last for an extended period. The folding feature renders the rifle compact and convenient. I wouldn't hesitate to purchase it again.
Recommended
Nice stock for 10/22
stone
Location:
Date:
May 7, 2023
I'm quite fond of this stock. Installation is a breeze, and it has a sleek appearance. The side-folding buttstock functions flawlessly. However, I'm giving it four stars because when using a bull barrel, you need to remove the so-called dust cover to create space. This action exposes the chassis ribs, which isn't visually appealing. It would have been better if they designed it with two different dust covers tailored for each barrel type. Despite this minor issue, I still recommend it.
Recommended
New Chasis
Jb1010
Location:
Date:
May 7, 2023
The product arrived quickly, with all components present and in proper working order. The fit was secure, and every required part aligned flawlessly. The ordering process was simple, and I could track the product at any time. I received email updates throughout the delivery process, making this an outstanding purchase experience.
Recommended
Fab Defense M4 10/22 Stock
Mike D.
Location:
Date:
May 7, 2023
This stock is exceptionally well-crafted and installation is a breeze. It not only transforms the appearance of the rifle but also offers adjustability to accommodate every member of my family, including my 8-year-old son. I would undoubtedly consider purchasing it again.
Recommended
8 Total Reviews
- 1
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