Description
The FAB Defense RAPS is a precision stock that solves a real problem behind the rifle: making fast, repeatable adjustments without breaking your position. Instead of fiddling with two or three separate knobs and levers, everything runs off FAB's patent-pending 1Latch system. One lever locks both the length of pull and the cheek rest height, so you can set up your rig and get back on target in a hurry. It's built from durable polymer composite to keep the weight down, and the whole thing installs on a standard receiver extension without any gunsmithing.
What the 1Latch System Brings to the RAPS
The standout here is the memory feature, which FAB claims is a first of its kind. Set your length of pull once, drop the butt-pad in, and it springs back out to that exact same preset every time. That means whether you're transitioning between positions or handing the rifle off and getting it back, your LOP stays consistent. The 1Latch lever can also be configured for right or left-hand shooters, so lefties aren't stuck working around a righty design.
Cheek Weld and Fit on the RAPS Stock
The integrated cheek rest adjusts up to 42mm (about 1.65 inches) in height, which is plenty of room to get a proper cheek weld behind a scope with tall rings or an elevated mount. The length of pull moves through a 32mm (1.26 inch) range, and there's a non-slip rubber butt-pad with 10mm of height adjustment on top of that. Between those three points of adjustment, shooters of just about any size can find a repeatable, comfortable setup.
Mounting and Real-World Use
One detail that gets overlooked is the concealed Picatinny rail at the bottom of the stock, ready for a rear monopod when you want that extra stability off a bench or barricade. The RAPS ships with adapters to cover both AR-15 and AR-10 setups, so it works as a DMR or precision build stock across platforms. It's a solid pick for competition, long-range range days, or any AR where dialing in fit matters more than saving a few ounces.
Key Specifications
- Manufacturer: FAB Defense
- Manufacturer Part Number: FX-RAPS
- Model: RAPS (Rapid Adjustment Precision Stock)
- UPC: 7290111586125
- Color: Black
- Material: Durable polymer composite
- Platform Compatibility: AR-15 and AR-10
- LOP Adjustment Range: 32mm (1.26 in)
- Cheek Rest Height Adjustment: Up to 42mm (1.65 in)
- Butt-Pad Height Adjustment: 10mm
- Adjustment System: Patent-pending 1Latch, one-lever LOP and cheek rest lock
- Handedness: Configurable for right or left-hand shooters
- Special Features: LOP memory feature, concealed bottom Picatinny rail for monopod
- Shipping Weight: 1.73 lbs
What’s Included
- FAB Defense RAPS stock
- One pre-installed adapter for rifle-length receiver extension tube
- Two additional adapters for MIL-SPEC carbine tubes (one for M4-type receivers, one universal)
Frequently Asked Questions
Does the FAB Defense RAPS fit both AR-15 and AR-10 rifles?
Yes. The RAPS ships with a pre-installed adapter for rifle-length receiver extension tubes plus two more adapters for MIL-SPEC carbine tubes, one for M4-type receivers and one universal. That coverage lets it work across AR-15 and AR-10 builds without extra parts.
What is the 1Latch memory feature on the RAPS stock?
The 1Latch system uses a single lever to lock both the length of pull and cheek rest height at once. The memory feature lets you preset your LOP so the butt-pad springs back out to that exact length every time you extend it. It keeps your fit consistent when you're moving between positions or sharing the rifle.
Can left-handed shooters use the FAB Defense RAPS?
Yes. The 1Latch system can be configured for either right or left-hand operation, so the adjustment lever isn't fighting you no matter which shoulder you shoot from. That's a nice touch since a lot of precision stocks are built around righties only.
Do I need a gunsmith to install the RAPS?
No gunsmithing is required. The RAPS mounts onto a standard receiver extension using the included adapters, so most folks can get it on and set up at home with basic tools. It's a straightforward swap for an existing AR stock.





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