FAB Defense FXRAPS RAPS Precision Adjustable Stock - Synthetic, Matte Black, Cheekrest, Rubber Butt Pad & Picatinny Rail for AR-Platform

The FAB Defense FXRAPS RAPS Precision Adjustable Stock is built for shooters who demand comfort and repeatability in the field or at the range. This synthetic AR-platform stock combines an integrated cheekrest with one-handed length-of-pull adjustment, letting you dial in your setup without breaking sight picture. Whether you're running a precision rifle, building a match gun, or setting up a tactical carbine, the RAPS gives you the flexibility to fit shooters of different sizes and shooting positions—all without a gunsmith.

The real innovation here is the patent-pending 1Latch system. One lever controls both your length of pull and cheekrest height, and it works from either side for right- or left-hand shooters. Even better: the RAPS remembers. Set your preferred length of pull once, and the memory feature automatically returns the adjustable butt pad to that same position every time you extend it. No fumbling, no guessing—just consistent, repeatable adjustments under stress or low light.

Built from tough polymer composite, the RAPS is engineered to handle hard use across any environment. The integrated cheekrest adjusts up to 42mm, the butt pad itself can be fine-tuned for an additional 10mm of height, and a concealed Picatinny rail along the bottom accepts a monopod for added stability. The stock ships with one pre-installed adapter for rifle-length tubes plus two additional adapters for carbine-length systems, making it compatible with most AR builds right out of the box.

Key Features

• Patent-pending 1Latch system: single lever adjusts both length of pull and cheekrest height
• Memory feature returns adjustable butt pad to your preset length of pull automatically
• Integrated cheekrest with up to 42mm height adjustment for consistent cheek weld across positions
• Adjustable length of pull range: 32mm (accommodates different arm lengths and body sizes)
• Heavy-duty rubber butt pad with 10mm of independent height adjustment
• Configurable for right- or left-hand operation
• Concealed Picatinny rail for monopod mounting
• Lightweight synthetic polymer composite construction
• Includes three receiver tube adapters (one rifle-length, two carbine-length)
• No gunsmith installation required

Specifications

Frequently Asked Questions

Will this stock fit my AR-15 or AR-10?

The RAPS ships with adapters for both rifle-length and carbine-length receiver extension tubes. The package includes one pre-installed rifle-length adapter, plus two additional carbine-length adapters (one M4 type and one universal). Most AR-15s and AR-10s will be compatible, but verify your receiver tube type before ordering.

Can I adjust the stock with one hand while shooting?

Yes. The 1Latch system controls both length of pull and cheekrest height with a single lever, designed for one-handed operation so you can keep your eyes downrange during adjustments.

What is the memory feature and how does it work?

Once you set your preferred length of pull, the memory feature causes the adjustable butt pad to automatically return to that same position whenever you extend it. This eliminates the need to re-dial your setup after collapsing the stock.

Can I use this stock for left-handed shooting?

Yes. The 1Latch system can be configured for either right- or left-hand operation, making the stock fully ambidextrous.