GREY BIRCH LACHASSIS 10 | CZ 457 | FOLDING | CLEAR ANODIZED
37 Ounces. Folds to 20.5 Inches.
The Grey Birch LaChassis 10 is a folding CZ 457 chassis machined from 6061-T6 aluminum in a clear hard anodized finish, and it weighs 37 oz. A 10″ modular forend carries both M-LOK and ARCA-Swiss, there's an integral recoil lug and a magwell cutout, and it folds to 20.5″ or locks permanently in the fixed position if you'd rather it didn't.
Rimfire chassis tend to get heavy fast, and that's fine on a bench and miserable on a hike. At 37 oz this one is roughly half the weight of a full competition chassis, and it folds, which means a .22 that actually fits in a pack or behind a truck seat instead of being the longest thing you own. You still get the parts that matter: an integral recoil lug, length of pull from 13″ to 14.5″, cheek weld adjustment, ambidextrous QD points on both the forend and the stock, and an AR grip mount so you pick your own grip instead of living with theirs. Use it for: backpack and truck guns, squirrel and rabbit hunting, NRL22 hunter-class stages, .22 trainers and any CZ 457 you'd rather carry than lug.
Folding, and Locking If You Want.
Folded it's 20.5″, open it runs 29.5″ to 30.5″ depending on your length-of-pull setting. The hinge can be permanently locked into a fixed position, which matters for two reasons: some matches don't allow folding stocks, and some shooters simply don't want a joint in the rifle. Buying it folding and locking it later keeps both doors open. Assembly and adjustment takes 5/64″ and 5/32″ Allen keys and nothing else.
A 10″ Forend With Both Standards.
The modular forend is M-LOK and ARCA-Swiss compatible at the same time, so you're not choosing a mounting system at purchase. Clamp an ARCA bipod anywhere along the rail, or bolt M-LOK accessories where you want them. The magwell cutout gives your hand somewhere to go on a reload, and the grip-to-trigger geometry was set up for a straighter trigger press. Note that the grip is not included, and neither is the barreled action.
Our Take
A Chassis Doesn't Fix the Action
We've spent more than six years building, tuning and supporting CZ rimfire rifles, and the honest truth about a chassis is that it improves how the rifle fits you, not how the action works. The parts that change that are the ones we machine ourselves: the PP457FP-T reshaped tip firing pin, the PP457ES extractor holder, the Gen 2 extractor spring, and a stainless cocking indicator in place of the factory plastic one. Our parts fit most CZ 455 and 457 rifles. We machine to very tight tolerances, so every now and then a production rifle with factory tolerance stack-up falls a little outside that range.
Shop our CZ 457 parts →About That Clear Anodized Finish.
Grey Birch notes that the finish may not exactly match their website images, and that the shade can vary when you pair it with other parts. That's normal for clear anodize, and it's also fixable. We run custom Cerakote in house with fast in-stock lead times on most builds, so if you'd rather have this chassis in M81 Woodland, Arctic Camo, Snow Camo, Snow White, Robin's Egg Blue or Blaze Orange, or matched to a barrel or action you already own, send us the details. Grey Birch also offers the LaChassis 10 in M81 Woodland camo.
Pair It With
Magpul MOE Pistol GripThe grip isn't included. This one fits.
MDT Mountain Bipod5.7 oz, to keep a 37 oz build light
Our PP45715 15 MOA RailDovetail to Picatinny, made in USA
Made in USA
The CZ 457 Parts We Machine Ourselves
Firing pins, extractors, bolt knobs, rails and mag releases, cut here in Michigan and shipped from here.
Made in USAPete's PillarsReshaped Tip Firing PinNitrided tool steel. The part we're known for.Shop Now →
Made in USAPete's PillarsOEM-Style Firing PinFor .22 WMR, .17 HMR and magnum rimfire.Shop Now →
Made in USAPete's PillarsExtractor Holder PP457ESUpgraded replacement extractor holder.Shop Now →
Made in USAPete's PillarsGen 2 Extractor SpringStronger spring steel. Replaces OEM.Shop Now →
Made in USAPete's PillarsExtended Cocking IndicatorStainless, replaces the factory plastic part.Shop Now →
Made in USAPete's PillarsExtended Magazine Release0.40" more reach, bumpy serrations.Shop Now →
Made in USAPete's PillarsSlim Helix Bolt KnobBillet aluminum, knurled helix pattern.Shop Now →
Made in USAPete's PillarsXL Finger Groove Bolt KnobKnurled XL knob for a full hand.Shop Now →
Made in USAPete's PillarsSlim Knurled Grooved KnobBillet aluminum with knurled grooves.Shop Now →
Made in USAPete's Pillars15 MOA Picatinny RailDovetail to Picatinny, 15 MOA.Shop Now →
Made in USAPete's PillarsAluminum Magazine WellReplaces the factory polymer well.Shop Now →
Build It Out
Grips, Bipods, Mounts & Magazines
The grip isn't included and the forend takes both standards, so here's the full range: Magpul, MDT, Area 419, DIP, L3i, Position7, CZ and ours.
MagpulMOE Pistol GripAR-pattern grip for the included mount.Shop Now →
MDTCkye-Pod Gen 3 Compact4.6-11.9", clamps to the ARCA forend.Shop Now →
MDTMountain Bipod5.7 oz carbon and titanium, direct ARCA.Shop Now →
MDTGRND-POD M-LOK BipodLow-profile M-LOK bipod.Shop Now →
Made in USAPete's Pillars15 MOA Picatinny RailDovetail to Picatinny, made in USA.Shop Now →
Area 41915 MOA Dovetail to Pic RailPrecision dovetail adapter.Shop Now →
MDTCZ 457 20 MOA Scope BaseClamp-on dovetail adapter.Shop Now →
DIPCZ 457 Dovetail to Pic, 0 MOANo-drill dovetail conversion.Shop Now →
CZFactory 10-Round Magazine.22 LR polymer, 457/455/452/512.Shop Now →
L3iBillet 10-Round Magazine6061-T6 body, anti-tilt follower.Shop Now →
Position7Billet 13-Round Magazine12+1 for stage work.Shop Now →
GrovTecPush-Button QD Swivels 1.25"For the ambi QD points. 2-pack.Shop Now →
The Next Level
The Sensible Step Up, Then the Stretch.
- Step one: the MDT ACC Premier Gen2 CZ 457, also a folding chassis, with an interior weight system and more adjustment than the LaChassis. It's the realistic next move rather than a leap.
- Step two, when you're ready: the MDT ACC Elite CZ 457, MDT's flagship, with a 19″ forend, full-length ARCA and the complete internal and external weight system.
- Or spend the money on accuracy instead: a L3i 24″ match barrel or a Lilja .900 26″ will change what the rifle does more than any chassis will.
Browse all chassis and match barrels.
Did You Know?
Pete's Pillars Sells More Than Pillars.
From centerfire chassis to optics and reloading, outfit every rifle in the safe in one place.
Optics & Mounts
Bipods & Magazines
Product Specifications
Manufacturer: Grey Birch MFG
Model: LaChassis 10, Folding
Platform: CZ 457
Material: 6061-T6 Aluminum
Finish: Clear Hard Anodize
Weight: 1040 g (37 oz)
Length of Pull: 13″ to 14.5″
Overall Length: 29.5″ to 30.5″
Overall Length Folded: 20.5″
Forend / Rail Length: 10″, M-LOK and ARCA-Swiss Compatible
Features: Integral Recoil Lug, Magwell Cutout, Cheek Weld Adjustment, Ambidextrous QD Points on Forend and Stock
Folding: Yes; Can Be Permanently Locked in the Fixed Position
Grip: AR Grip-Compatible Mounting Point (Grip Not Included)
Tools Required: 5/64″ and 5/32″ Allen Keys
Not Included: CZ 457 Barreled Action, Grip
Frequently Asked Questions
Fitment, folding, grips, finish and building out your CZ 457.
Will it fit my rifle?
It's built for the CZ 457, and the barreled action is not included. Grey Birch doesn't publish a barrel channel dimension or a per-variant fitment list, so if you're running a heavy aftermarket contour or an unusual 457 variant, send us your setup and we'll check before you order.
Does it come with a grip?
No. It has an AR grip-compatible mounting point, so you choose. The Magpul MOE pistol grip is the simple, proven answer, and you can browse all our rifle grips for something with more texture or a different angle.
Can I lock the folder so it doesn't fold?
Yes. The stock can be permanently locked into a fixed position. That's worth knowing if your match rules exclude folding stocks, or if you just prefer a rifle without a hinge. Buying the folder and locking it later gives you both options.
M-LOK or ARCA for my bipod?
The 10″ forend takes both, so run whichever you already own. An ARCA bipod like the Ckye-Pod Gen 3 Compact clamps anywhere along the rail. If you're keeping the build light to match the 37 oz chassis, the MDT Mountain Bipod is 5.7 oz, and the GRND-POD is the low-profile M-LOK option.
Will the finish match my other parts?
Grey Birch says the clear anodize may not exactly match their website images and that the shade can vary alongside other parts, which is normal for clear anodize. If you want a guaranteed match, we run custom Cerakote in house with fast in-stock lead times on most builds and can finish this chassis to your spec. Tell us what you need matched. Grey Birch also makes it in M81 Woodland camo.
How does it compare to the other CZ 457 chassis you carry?
We only carry parts we trust, can stand behind and know are built with quality, so you're in good hands either way. Grey Birch's advantage here is weight and packability, and nothing else we stock folds to 20.5″ at 37 oz. If you want more adjustment and don't care about carrying it, look at the MDT XRS or the ACC Elite; for a field stock, the MDT Field Stock CZ 457; and the KRG Bravo is the rugged match-line favorite. What we'd add to any of them is our own action parts, since none of these chassis change how the action runs.
Does Pete's Pillars sell more than chassis?
Yes. We machine our own CZ 457 firing pins, extractors, cocking indicators, magazine releases, bolt knobs, rails, match barrels and pillar bedding here in Michigan, and we run custom Cerakote in house. We also carry chassis from MDT, XLR and Grey Birch, barrels from Lilja and L3i, magazines, optics, bipods and reloading gear like the Area 419 ZERO press.
Small Change. Big Impact. Pete's Pillars.
GREY BIRCH LACHASSIS 10 | CZ 457 | FOLDING | CLEAR ANODIZED
37 Ounces. Folds to 20.5 Inches.
The Grey Birch LaChassis 10 is a folding CZ 457 chassis machined from 6061-T6 aluminum in a clear hard anodized finish, and it weighs 37 oz. A 10″ modular forend carries both M-LOK and ARCA-Swiss, there's an integral recoil lug and a magwell cutout, and it folds to 20.5″ or locks permanently in the fixed position if you'd rather it didn't.
Rimfire chassis tend to get heavy fast, and that's fine on a bench and miserable on a hike. At 37 oz this one is roughly half the weight of a full competition chassis, and it folds, which means a .22 that actually fits in a pack or behind a truck seat instead of being the longest thing you own. You still get the parts that matter: an integral recoil lug, length of pull from 13″ to 14.5″, cheek weld adjustment, ambidextrous QD points on both the forend and the stock, and an AR grip mount so you pick your own grip instead of living with theirs. Use it for: backpack and truck guns, squirrel and rabbit hunting, NRL22 hunter-class stages, .22 trainers and any CZ 457 you'd rather carry than lug.
Folding, and Locking If You Want.
Folded it's 20.5″, open it runs 29.5″ to 30.5″ depending on your length-of-pull setting. The hinge can be permanently locked into a fixed position, which matters for two reasons: some matches don't allow folding stocks, and some shooters simply don't want a joint in the rifle. Buying it folding and locking it later keeps both doors open. Assembly and adjustment takes 5/64″ and 5/32″ Allen keys and nothing else.
A 10″ Forend With Both Standards.
The modular forend is M-LOK and ARCA-Swiss compatible at the same time, so you're not choosing a mounting system at purchase. Clamp an ARCA bipod anywhere along the rail, or bolt M-LOK accessories where you want them. The magwell cutout gives your hand somewhere to go on a reload, and the grip-to-trigger geometry was set up for a straighter trigger press. Note that the grip is not included, and neither is the barreled action.
Our Take
A Chassis Doesn't Fix the Action
We've spent more than six years building, tuning and supporting CZ rimfire rifles, and the honest truth about a chassis is that it improves how the rifle fits you, not how the action works. The parts that change that are the ones we machine ourselves: the PP457FP-T reshaped tip firing pin, the PP457ES extractor holder, the Gen 2 extractor spring, and a stainless cocking indicator in place of the factory plastic one. Our parts fit most CZ 455 and 457 rifles. We machine to very tight tolerances, so every now and then a production rifle with factory tolerance stack-up falls a little outside that range.
Shop our CZ 457 parts →About That Clear Anodized Finish.
Grey Birch notes that the finish may not exactly match their website images, and that the shade can vary when you pair it with other parts. That's normal for clear anodize, and it's also fixable. We run custom Cerakote in house with fast in-stock lead times on most builds, so if you'd rather have this chassis in M81 Woodland, Arctic Camo, Snow Camo, Snow White, Robin's Egg Blue or Blaze Orange, or matched to a barrel or action you already own, send us the details. Grey Birch also offers the LaChassis 10 in M81 Woodland camo.
Pair It With
Magpul MOE Pistol GripThe grip isn't included. This one fits.
MDT Mountain Bipod5.7 oz, to keep a 37 oz build light
Our PP45715 15 MOA RailDovetail to Picatinny, made in USA
Made in USA
The CZ 457 Parts We Machine Ourselves
Firing pins, extractors, bolt knobs, rails and mag releases, cut here in Michigan and shipped from here.
Made in USAPete's PillarsReshaped Tip Firing PinNitrided tool steel. The part we're known for.Shop Now →
Made in USAPete's PillarsOEM-Style Firing PinFor .22 WMR, .17 HMR and magnum rimfire.Shop Now →
Made in USAPete's PillarsExtractor Holder PP457ESUpgraded replacement extractor holder.Shop Now →
Made in USAPete's PillarsGen 2 Extractor SpringStronger spring steel. Replaces OEM.Shop Now →
Made in USAPete's PillarsExtended Cocking IndicatorStainless, replaces the factory plastic part.Shop Now →
Made in USAPete's PillarsExtended Magazine Release0.40" more reach, bumpy serrations.Shop Now →
Made in USAPete's PillarsSlim Helix Bolt KnobBillet aluminum, knurled helix pattern.Shop Now →
Made in USAPete's PillarsXL Finger Groove Bolt KnobKnurled XL knob for a full hand.Shop Now →
Made in USAPete's PillarsSlim Knurled Grooved KnobBillet aluminum with knurled grooves.Shop Now →
Made in USAPete's Pillars15 MOA Picatinny RailDovetail to Picatinny, 15 MOA.Shop Now →
Made in USAPete's PillarsAluminum Magazine WellReplaces the factory polymer well.Shop Now →
Build It Out
Grips, Bipods, Mounts & Magazines
The grip isn't included and the forend takes both standards, so here's the full range: Magpul, MDT, Area 419, DIP, L3i, Position7, CZ and ours.
MagpulMOE Pistol GripAR-pattern grip for the included mount.Shop Now →
MDTCkye-Pod Gen 3 Compact4.6-11.9", clamps to the ARCA forend.Shop Now →
MDTMountain Bipod5.7 oz carbon and titanium, direct ARCA.Shop Now →
MDTGRND-POD M-LOK BipodLow-profile M-LOK bipod.Shop Now →
Made in USAPete's Pillars15 MOA Picatinny RailDovetail to Picatinny, made in USA.Shop Now →
Area 41915 MOA Dovetail to Pic RailPrecision dovetail adapter.Shop Now →
MDTCZ 457 20 MOA Scope BaseClamp-on dovetail adapter.Shop Now →
DIPCZ 457 Dovetail to Pic, 0 MOANo-drill dovetail conversion.Shop Now →
CZFactory 10-Round Magazine.22 LR polymer, 457/455/452/512.Shop Now →
L3iBillet 10-Round Magazine6061-T6 body, anti-tilt follower.Shop Now →
Position7Billet 13-Round Magazine12+1 for stage work.Shop Now →
GrovTecPush-Button QD Swivels 1.25"For the ambi QD points. 2-pack.Shop Now →
The Next Level
The Sensible Step Up, Then the Stretch.
- Step one: the MDT ACC Premier Gen2 CZ 457, also a folding chassis, with an interior weight system and more adjustment than the LaChassis. It's the realistic next move rather than a leap.
- Step two, when you're ready: the MDT ACC Elite CZ 457, MDT's flagship, with a 19″ forend, full-length ARCA and the complete internal and external weight system.
- Or spend the money on accuracy instead: a L3i 24″ match barrel or a Lilja .900 26″ will change what the rifle does more than any chassis will.
Browse all chassis and match barrels.
Did You Know?
Pete's Pillars Sells More Than Pillars.
From centerfire chassis to optics and reloading, outfit every rifle in the safe in one place.
Optics & Mounts
Bipods & Magazines
Product Specifications
Manufacturer: Grey Birch MFG
Model: LaChassis 10, Folding
Platform: CZ 457
Material: 6061-T6 Aluminum
Finish: Clear Hard Anodize
Weight: 1040 g (37 oz)
Length of Pull: 13″ to 14.5″
Overall Length: 29.5″ to 30.5″
Overall Length Folded: 20.5″
Forend / Rail Length: 10″, M-LOK and ARCA-Swiss Compatible
Features: Integral Recoil Lug, Magwell Cutout, Cheek Weld Adjustment, Ambidextrous QD Points on Forend and Stock
Folding: Yes; Can Be Permanently Locked in the Fixed Position
Grip: AR Grip-Compatible Mounting Point (Grip Not Included)
Tools Required: 5/64″ and 5/32″ Allen Keys
Not Included: CZ 457 Barreled Action, Grip
Frequently Asked Questions
Fitment, folding, grips, finish and building out your CZ 457.
Will it fit my rifle?
It's built for the CZ 457, and the barreled action is not included. Grey Birch doesn't publish a barrel channel dimension or a per-variant fitment list, so if you're running a heavy aftermarket contour or an unusual 457 variant, send us your setup and we'll check before you order.
Does it come with a grip?
No. It has an AR grip-compatible mounting point, so you choose. The Magpul MOE pistol grip is the simple, proven answer, and you can browse all our rifle grips for something with more texture or a different angle.
Can I lock the folder so it doesn't fold?
Yes. The stock can be permanently locked into a fixed position. That's worth knowing if your match rules exclude folding stocks, or if you just prefer a rifle without a hinge. Buying the folder and locking it later gives you both options.
M-LOK or ARCA for my bipod?
The 10″ forend takes both, so run whichever you already own. An ARCA bipod like the Ckye-Pod Gen 3 Compact clamps anywhere along the rail. If you're keeping the build light to match the 37 oz chassis, the MDT Mountain Bipod is 5.7 oz, and the GRND-POD is the low-profile M-LOK option.
Will the finish match my other parts?
Grey Birch says the clear anodize may not exactly match their website images and that the shade can vary alongside other parts, which is normal for clear anodize. If you want a guaranteed match, we run custom Cerakote in house with fast in-stock lead times on most builds and can finish this chassis to your spec. Tell us what you need matched. Grey Birch also makes it in M81 Woodland camo.
How does it compare to the other CZ 457 chassis you carry?
We only carry parts we trust, can stand behind and know are built with quality, so you're in good hands either way. Grey Birch's advantage here is weight and packability, and nothing else we stock folds to 20.5″ at 37 oz. If you want more adjustment and don't care about carrying it, look at the MDT XRS or the ACC Elite; for a field stock, the MDT Field Stock CZ 457; and the KRG Bravo is the rugged match-line favorite. What we'd add to any of them is our own action parts, since none of these chassis change how the action runs.
Does Pete's Pillars sell more than chassis?
Yes. We machine our own CZ 457 firing pins, extractors, cocking indicators, magazine releases, bolt knobs, rails, match barrels and pillar bedding here in Michigan, and we run custom Cerakote in house. We also carry chassis from MDT, XLR and Grey Birch, barrels from Lilja and L3i, magazines, optics, bipods and reloading gear like the Area 419 ZERO press.
Small Change. Big Impact. Pete's Pillars.
| Brand | Grey Birch |
| Gun Platform | CZ 457 |