X-Ray Chassis Forend (Generation 4 Chassis):
- Polymer for light weight and to eliminate heat transfer to/from the shooter's hand
- M-LOK slots on sides for mounting flexibility
- Mounting holes at various positions will take L2 Picatinny rails, Tripod Mount, Barrier Stop, etc
- Access hole for action mounting screw, so you can remove the action without removing forend
"Backbone"/Chassis:
- Aluminum backbone runs to tip of forend for maximum stiffness and modularity
- Utilizes radius bedding, which is CNC'd into aluminum backbone for consistent contact between action and chassis
- Can accommodate most large aftermarket recoil lugs like the Badger Ordnance lug without any or with only slight modification
- Accepts the Whiskey-3 gen 3/4 Spigot Mount
- Designed for 5 or 10 round AICS magazines (with front spacer plate only in Remington 700 unless you have a modified action)
- Barrel contours accepted: 1.25" for 4" in front of action face, then 1.20" straight to end of forend. A 1.25" straight cylinder barrel will fit but KRG feels that the clearance is too minimal. They recommend a varmint or medium palma contour to keep proper balance
Trigger Guard/Mag Catch:
- Similar in shape to TRG trigger guard. Made from reinforced polymer for added strength and less cold/heat transfer to the shooter's hand
- Will accept the new X-Mark triggers and nearly all aftermarket triggers but some aftermarket triggers may require modifications to the trigger or chassis
- Mag catch is the same as the Whiskey-3 but the catch extender button is an optional item
Cheekpiece/Handgrips:
- Cheekpiece infinitely adjustable within range (1" travel)
- Cheekpiece can be quickly removed and re-installed, uses a clamp and thumbscrew design
- The thumbscrew can be positioned on either the right or left side of the chassis
- Includes a simple feature to make the cheek piece return to the exact height you set it
- Cheekpiece can be moved forward or backward with one alternate position
- Cheekpiece made of polymer to not transmit heat to or away from your face
- Small grips are standard fitment. Larger grip size is available as an option.
Length of Pull (LOP):
- Adjustable with spacers in 3/8" increments with nearly 2 1/4" of adjustment range
- LOP range varies slightly between versions but is roughly 12.7" to 15" (longer length is possible with additional optional spacers)
- X-Ray's include the KRG 1-3 LOP kit which includes 3 spacers and the hardware to mount either 1, 2, or 3 allowing a max LOP of about 13.8"
Buttstock:
- Single piece body made of reinforced polymer material
- Heavy internal ribbing provides great strength
- Mounting points for external QD cup or for the KRG Sling Loop/QD mount on either side
- Built in thumbshelf for same-side-thumb-grip shooter
- Entire buttstock assembly can be used on Whiskey-3 if you should desire
Buttpad:
- High quality KRG recoil pad with Tool-less height and cant adjustments
- Adjusted with hex wrench
- Buttpad is Remington 700 pattern so user can install aftermarket pre-fit pads
Mounting features for slings, monopods, etc:
- Buttstock has one position on each side for external QD cup and one position on each side for Sling Loop/QD Mount (optional accessories)
- Buttstock includes mounting points for an optional bag rider/butthook or MOE L2 Picatinny rail
- Harris bipod stud included on forend
- Spigot Mount can be added to front of chassis
- Ambi QD sling plate can be mounted and provides 3 positions for QD sling or HK hook sling attachments (optional accessory)
- All X-Ray stocks come with one MOE L2 rail
Materials/Finishes:
- Most aluminum parts are hard anodized Type III
- All fasteners are stainless steel, some with black oxide coating, some without
- Steel parts are salt bath nitrided or stainless steel
- Grip panels, forend, buttstock are injection molded reinforced polymer
- Weight 3.0 lbs without magazine
**Gen 4 is the current version as of July 2020. The change is a new one piece backend, which comes standard with tool-less buttpad height and cant adjustment, as we'll as an ambidextrous cheekpiece thumbscrew.