BuckRail Tactical PRS ARCA Chassis Stock for FX DRS Mk1/Mk2

From the mind of Terry at BuckRail comes a properly thought-out way of re-housing the FX DRS, without going down either of the usual extremes. On one end you have big-name chassis systems with equally big price tags. On the other, fast-and-cheap FDM 3D printed options that look fine until real-world use reminds you why they were cheap. This sits neatly in the sensible middle.
 
BuckRail have gone with Selective Laser Sintering (SLS) using Nylon 12, which is a big deal if you care about strength, weight and dimensional accuracy. Nylon 12 is genuinely impressive stuff, and SLS printing produces parts that are rigid, tough and consistent, without the layer weakness you get from basic FDM printing. In short, it lasts.
 
The core of the system is the FX DRS chassis base, which your action drops straight into. This is also SLS printed and designed to accept AR-style grips, although some fitting may be required depending on the grip you choose. A built-in hand stop at the rear of the front rail gives you a solid reference point for controlled shooting, particularly useful for positional or supported work.
 
At the rear, the integrated PRS-style stock bolts directly to the chassis base and is clearly designed with precision-style shooting in mind. Adjustable cheekpiece, adjustable length of pull, no nonsense.
The supplied chassis also gives you plenty of flexibility if you decide the standard PRS configuration isn't for you. Both a threaded buffer tube adapter and a 1913 Picatinny adapter are included, allowing you to run AR buffer tube stocks or Picatinny-mounted stocks such as side folders.
 
And if you want the PRS stock itself to fold, BuckRail also offer an optional folding stock adapter, available separately. This fits between the PRS stock and chassis, allowing the stock to fold to the left-hand side of the rifle for easier storage and transport.
 
The folding stock adapter is not included with this chassis stock package and must be purchased separately.
 
Up front, the DRS gets dragged firmly into the modern era with an M-LOK quad rail handguard that surrounds the barrel. Underneath sits a full-length ARCA rail, ready for tripods and compatible shooting supports.
 
The kit also includes a dovetail-to-Picatinny top rail adapter that blends into the handguard, extending your optics rail forward over the barrel for proper scope placement.
 
This is a chassis system built by someone who actually shoots, not just someone chasing a logo.
 
Key Features
Designed specifically for the FX DRS
Manufactured using SLS Nylon 12
Strong, rigid and lightweight construction
AR flat top grip compatible chassis base
Integrated adjustable PRS-style stock
Adjustable cheekpiece
Adjustable length of pull
Swappable rear mounting options
1-3/16-16 threaded buffer tube adapter included
1913 Picatinny rear stock adapter included
M-LOK quad rail handguard
Integrated full-length lower ARCA rail
Extended top Picatinny rail via dovetail conversion
Optional folding stock adapter available separately
 
Optional Folding Stock Adapter
For shooters who want the functionality of a folding PRS stock, BuckRail offer a dedicated folding stock adapter for this chassis.
 
The adapter fits between the PRS stock and chassis and allows the stock to fold to the left-hand side of the FX DRS. A locking button secures the stock in the open position and must be pressed before the stock can be folded.
 
The adapter does not lock the stock in the folded position, so the folded stock is free to move. Clearance should therefore be checked around gauges, cocking arms and other controls located on the left side of the rifle.
 
Fitting the folding adapter also increases the length of pull by approximately 50 mm, which should be taken into account when configuring the rifle.
 
The folding adapter is supplied with its own dedicated screws. These must be used instead of the original stock screws, as using the incorrect screws can cause damage to the rifle or stock assembly.
Installation requires a suitable hex tool set and a reasonable level of mechanical competence and mechanical sympathy.
 
Folding Stock Adapter sold separately. It is not included with this chassis stock package.
Includes
BuckRail FX DRS chassis base, AR grip compatible
BuckRail FX DRS PRS-style integrated stock
BuckRail FX DRS ARCA quad rail handguard
BuckRail 1913 rear-facing Picatinny adapter
BuckRail 1-3/16-16 TPI threaded adapter for AR buffer tubes and adjustable stocks
Dovetail-to-Picatinny top rail adapter
 
Specifications
Compatibility: FX DRS
Material: SLS Nylon 12
Finish: Matte Black
Weight: 800 g, parts only
Grip Compatibility: AR-style grips
Stock Type: PRS-style adjustable
Lower Rail: Full-length ARCA
Handguard: M-LOK quad rail
Rear Mounting: 1913 Picatinny / 1-3/16-16 threaded
Folding Stock: Optional, using separate BuckRail folding stock adapter
 
Notes
FX DRS rifle is not included.
AR-style flat top grip is not included. BuckRail recommends ERGO or Magpul flat-top style grips for the best fit.
Some grip modification may be required depending on the exact grip used.
The optional folding stock adapter is not included and must be purchased separately.
If fitted, the folding adapter increases the length of pull by approximately 50 mm.
Check left-side clearance when the stock is folded.
 
If you want a serious, modern PRS-style chassis for the FX DRS without paying boutique money or gambling on hobby-grade printing, this is the sensible choice. And if you want to take the compactness a step further, the optional folding adapter adds another useful bit of flexibility without changing the basic chassis system.