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The FAB Defense FX-M4SKSB takes a rifle that has been running the same wood stock since the Cold War and gives it an upgrade that actually makes sense for how people shoot today. This is a full chassis conversion, not just a stock swap, so the pistol grip, magazine release, and rail sections all come together as one unit that bolts onto your SKS action.
The body is molded from fiberglass reinforced polymer, which keeps the whole setup light without feeling flimsy in hand. You get a quad Picatinny rail layout covering the top, bottom, and both sides of the forend, so mounting a light, optic, or vertical grip is just a matter of picking a spot. The integrated magazine release lever is one of the bigger upgrades here, since it replaces the fiddly stock SKS mag release with something you can actually operate quickly, and it works well with aftermarket mags like Tapco and Archangel that don't have their own built-in latch.
The buttstock on this model folds to the side with a push-button release and locks into place with a spring detent when tucked away, which makes the rifle noticeably shorter for storage or transport. Once deployed, the M4-style collapsible tube lets you adjust length of pull to fit your build or however you're geared up that day. Five quick-detach sling swivel sockets are built into the chassis, so there's no need to add a separate sling mount or drill anything.
A few things worth knowing before ordering: this chassis does not include a cutout for a bayonet lug, though most owners report their original cleaning rod still fits with a little adjustment at the front action screw. Fit varies slightly across SKS variants like the Norinco, Yugoslavian M59/66, and other Simonov-pattern rifles, so a bit of minor fitting during install is normal and expected with this kind of universal chassis system. FAB Defense has been building tactical furniture and accessories for military and law enforcement use for decades, and that background shows in how solid this chassis feels once it's mounted up.
It's built to fit standard SKS-style rifles including Norinco, Yugoslavian M59/66, and other Simonov-pattern variants. Some owners find it drops right on, while others need to do a little minor fitting or filing depending on the specific rifle and its barrel length, which is pretty normal for universal SKS chassis systems.
No, the FX-M4SKSB does not have a cutout for the bayonet lug, so that feature won't carry over once it's installed. Most owners report that the original cleaning rod can still be used, since it fits back into place after loosening the front action screw.
The integrated magazine release is designed to work with most aftermarket SKS magazines that don't have their own built-in release latch, including Tapco and Archangel mags. Magazines with an integrated lever built into the mag body itself typically aren't compatible with this release system.
No printed instructions are included in the box. Installation is straightforward for anyone familiar with basic SKS disassembly, though a quick video walkthrough beforehand can save some time if it's your first stock swap.
| UPC | 7290111584916 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | FX-M4SKSB |
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