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FAB Defense M4 PRO R10/22 Optics Ready Stock Conversion Kit for Ruger 10/22
If you love your Ruger 10/22 but want it to fit and handle more like a modern carbine, the FAB Defense M4 PRO R10/22 kit is the clean, all-in-one upgrade. You get a side-folding, collapsible stock setup, 1913 Picatinny rail space for accessories, and an ergonomic grip that helps the rifle feel more locked in from the first shot.
Why people buy this kit
- Adjustable fit: a collapsible buttstock system with 5 length options makes it easier to dial in comfort for different shooters or different shooting positions.
- Folds for storage: side-folding (left folding by default) helps the rifle store and transport more compactly.
- Accessory ready: built around 1913 MIL-STD Picatinny compatibility, so lights, grips, and other add-ons mount the way you expect.
What “Optics Ready PRO” means here
This model is commonly sold as an optics-ready PRO kit, built to make mounting and running accessories straightforward with Picatinny rail sections and a setup designed for modular add-ons. Always confirm the exact included components on your specific listing before ordering.
Key features
- 1913 MIL-STD Picatinny side and lower rails for secure accessory mounting
- Drop-in installation designed to be quick and straightforward
- Collapsible buttstock system with 5 length options
- Side folding buttstock (left folding by default) for compact carry and storage
- Quick-detach sling swivel sockets on both sides
- Ergonomic grip design with finger grooves and a shaped backstrap to help improve trigger operation
- Fiberglass reinforced polymer construction for durability with reasonable weight
- 25-year limited lifetime warranty (manufacturer-listed)
Compatibility
- Fits: Ruger 10/22 rifles (standard and bull barreled)
- Accessory standard: compatible with 1913 MIL-STD Picatinny based accessories
Specs
- Length: 490 mm (19.29 in)
- Weight: 1203 g (2.65 lb)
- Height: 147 mm (5.79 in)
- Width: 64 mm (2.5 in)
Before you order: quick fitment checklist
- Confirm your rifle is a Ruger 10/22 platform and note whether you run a standard or bull barrel.
- Plan your accessory mounting around 1913 Picatinny (lights, grips, and rail-mounted add-ons).
- If you are matching a specific color, verify the MPN (FX-M4PR1022B / G / T) on the listing.
FAQ
Does this fit a Ruger 10/22 bull barrel?
Yes. The manufacturer lists compatibility with standard and bull barreled Ruger 10/22 rifles. If your build is heavily customized, confirm fit notes before purchase.
Is the stock both folding and collapsible?
Yes. It is listed as a side-folding buttstock (left folding by default) and a collapsible system with 5 length options.
What accessories can I mount to the rails?
The rail sections are 1913 MIL-STD Picatinny, so accessories designed for 1913 Picatinny are the intended match.
Does it support QD sling mounting?
Yes. It is listed with quick-detach sling swivel sockets on both sides.
Do I need a gunsmith to install it?
It is designed as a quick drop-in installation. If you are not comfortable disassembling and reassembling your rifle’s stock components, a qualified gunsmith can handle the install.
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
(7)
4
(1)
3
(0)
2
(0)
1
(0)
Would recommend this product.
100%
out of 5
5
(7)
4
(1)
3
(0)
2
(0)
1
(0)
Would recommend this product.
100%
8 Total Reviews
- 1
Fab defense 10/22 rifle stock
JR
Location:
Date:
December 20, 2022
I am extremely satisfied with this Fab Defense 10/22 rifle stock. It allows for easy adjustments, enabling multiple people to shoot in good form. It also greatly improves the appearance of the gun, compared to the 20-year-old wood stock that it came with. The quality is excellent, and I would highly recommend it to others.
Recommended
Awesome Stock
Papa Bear
Location:
Date:
December 20, 2022
I highly recommend purchasing this stock. It transforms the appearance and feel of your Ruger 10/22 into that of a completely different rifle. It is made of high-quality materials, including what appears to be military-grade materials. The folding stock, made of the same poly material, is very sturdy and does not wobble at all. As a result of the stock, the rifle can now fit in both standard and smaller carrying cases.
Recommended
Nice Stock for the price
Carter
Location:
Date:
December 20, 2022
I purchased this stock for my 10/22 rifle in order to prepare it for shooting in the Steel Challenge competition. It met all of my requirements in terms of price, adjustability, and weight. Additionally, it has a visually appealing design and has received numerous compliments for its appearance.
Recommended
Neat stock
GPS RULZ
Location:
Date:
December 20, 2022
If you enjoy tinkering with your Ruger 10/22, the FAB Defense M4 Collapsible Stock Pro Conversion Kit is a great choice. It's extremely versatile and can be easily modified to suit your needs. For example, you can remove the heat shield/picatinny rail and barrel liner to transform it from a sport to a bull profile. You can also remove the rail to lighten it up. Despite its versatility, this stock is extremely sturdy and doesn't flex or twist under pressure. All in all, it's a great choice for those who like to customize their rifles.
Recommended
Superb quality
Reed
Location:
Date:
December 20, 2022
I recently installed the FAB Defense M4 Collapsible Stock Pro Conversion Kit on my high-end tactical Ruger 10/22 build and I couldn't be happier with the results. The fit is perfect - snug but not too tight - and all of the rail screws lined up perfectly. The finish is flawless and it took Cerakote with no issues at all. This stock is also incredibly solid, with no rattle and a positive lock when extended. All in all, it's a great addition to my rifle.
Recommended
Worth the wait
dominiccastellucci
Location:
Date:
December 20, 2022
I was blown away by how much I loved it! I also added the FAB Defense Lightweight & Strong Adjustable Cheek Rest Kit FOR GLR-16 GCP, which fit perfectly with the stock. So what are you waiting for? Don't hesitate, just get this amazing stock and cheek riser!
Recommended
My Gosh who wouldn't want this!
It
Location:
Date:
December 20, 2022
I'm so happy with my purchase of the FAB Defense M4 Collapsible Stock Pro Conversion Kit for my Ruger 10/22. It fit perfectly and I even bought the FAB Defense Lightweight & Strong Adjustable Cheek Rest Kit FOR GLR-16 GCP to go with it. Trust me, you won't regret getting this FAB Defense stock and cheek riser. Save yourself some time and just go for it!
Recommended
Great quality 10/22 stock
Royal
Location:
Date:
August 18, 2022
It's fantastic. However, I do want to point out to people trying to decide if this version is worth the extra money. The extended rail looks nice and is made of steel. The downside to purchasing this version is when you take the gun down to clean it. You now have 5 screws to remove instead of 1 or 2. The entire Picatinny rail is one piece. I use a scope on mine, and of course, I don't want to remove it and re-zero it every time I clean the rifle. So it takes time and patience to get 2 of the rail screws out. I am also using Fab Defenses QD swivel and QD Picatinny sling mounts. I also have the G2 bipod/grip and love it, but it is slightly heavy at almost 1 pound. This is probably one of the best tactical stocks for a 10/22 both in quality and looks.
Recommended
8 Total Reviews
- 1
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