FAB Defense FXM4PR1022B Collapsible M4 Buttstock, Left Side Folding, Matte Black Synthetic for Ruger 10/22

The FAB Defense FXM4PR1022B collapsible M4 buttstock brings modern ergonomics and modularity to your Ruger 10/22 with a left-side folding design that tucks away for compact storage or transport. If you've been running your 10/22 with iron sights and a basic setup, this stock conversion opens up tactical potential without sacrificing the rifle's legendary reliability. The matte black synthetic construction pairs durability with a clean, purposeful look that works equally well at the range, in the field, or for casual plinking.

What sets this stock apart is the thought put into actual use. The collapsible design lets you dial in length of pull to your preference, while the left-side folding action gets the stock out of the way when you need a compact profile—whether you're working in tight quarters or stowing the rifle in a truck or pack. The synthetic material won't freeze your cheek in winter or become slick with sweat, and there's no hassle of traditional buffer tube installation; this is a drop-in conversion for the 10/22 platform.

The stock integrates with Picatinny rail mounts along the handguard and upper receiver, so you can mount optics, lights, or other 1913 mil-spec accessories exactly where you need them. Quick-Detach sling swivel sockets on both sides give you flexibility in how you carry the rifle. The ergonomic design—including finger grooves and a supportive backstrap—encourages a consistent, comfortable grip that reduces fatigue during extended shooting sessions.

Key Features

• Collapsible buttstock with adjustable length of pull
• Left-side folding mechanism for compact carry and storage
• Ventilated 6061-T6 billet aluminum handguard with integrated Picatinny rails (upper, sides, and lower)
• 1913 MIL-STD Picatinny rail compatibility for optics and accessories
• Quick-Detach sling swivel sockets on both sides
• Drop-in installation—no gunsmithing required
• Ergonomic grip with finger grooves and backstrap design
• Matte black synthetic finish

Specifications

Frequently Asked Questions

Is this a drop-in replacement for the Ruger 10/22, or do I need a gunsmith?

This is a drop-in conversion kit designed for straightforward installation on the Ruger 10/22 platform. No gunsmithing is required.

Can I mount a scope or red dot on this stock?

Yes. The FXM4PR1022B includes Picatinny rails on the upper receiver and handguard that accept any standard 1913 mil-spec optics and accessories.

What does the left-side folding buttstock do?

The buttstock folds to the left, collapsing the profile of the rifle for more compact storage, transport, or handling in tight spaces. You can also adjust the length of pull when unfolded to customize fit.

What's the difference between this and a standard 10/22 stock?

This conversion adds modularity, rail space for accessories, adjustable length of pull, and a folding mechanism—all features that transform the 10/22 into a more versatile platform while keeping the rifle lightweight and reliable.