POSITION7 CZ 457 BILLET ALUMINUM MAGAZINE | .22 LR | 13 ROUND
12+1 and a Straighter Body.
The Position7 CZ457-MAG-MPA-13RD is a 13-round .22 LR magazine CNC-machined from 7075 billet aluminum with a black hard anodized finish. Its reduced-curvature body angles the cartridges internally for a straighter profile, so it clears bags, barricade stops and tight chassis cavities that a curved factory magazine fights.
Precision rimfire is won in the small stuff: a magazine that seats clean, releases where your thumb already is, and doesn't catch the bag on the way out. Position7 built this one around that problem. You get a full 12+1 for a PRS or NRL22 stage, individual witness holes for every round so you can count a loaded magazine at a glance, and a body geometry that works in the deep cavity of an MDT ACC chassis. Use it for: NRL22, PRS rimfire, IPRF PR22, rimfire steel and any CZ 455 or 457 match build.
Designed Around the Chassis, Not the Rifle.
Most CZ magazines curve, because that's the easy way to stack rimfire cartridges. Position7 angled the cartridge placement inside the body instead, which pulls the external profile closer to straight. That buys you clearance where it matters: against a rear bag, over a barricade stop, and inside an MDT ACC cavity where a curved magazine can make the release hard to reach. The body runs on steel small-head Torx fasteners with a custom 13-round spring. Designed by Roman Konečný, the 2025 IPRF PR22 Senior Division World Champion, and tested over thousands of rounds. Made in the Czech Republic.
Read This Before You Load It.
An aluminum magazine is harder than the factory CZ 457 polymer magwell it drops into. Position7 recommends running an aluminum magwell with aluminum magazines, because repeated seating against polymer raises the risk of cracking the factory well over time. If your rifle is still on the original polymer magwell, plan on an aluminum one as part of this upgrade. We make the PP457MW aluminum magazine well, and Position7 offers a full RH billet magwell kit that pairs with this magazine.
Our Take
Give It an Aluminum Well: PP457MW
We've spent more than six years building, tuning and supporting CZ rimfire rifles, and the factory polymer magwell is one of the first things we replace on a match gun. The PP457MW is our machined aluminum replacement, and it's the part we'd put under this magazine. 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.
See the PP457MW →Pair It With
Position7 Magwell KitFull RH billet well for aluminum mags
PP457MRB Extended Release0.40" more reach for faster mag changes
Position7 10-Rd ShortyFlush-fit option when 13 is too tall
Made in USA
Complete the Bolt Refresh
The CZ 457 parts we machine ourselves, ready to ship from Michigan.
Made in USAPete's PillarsReshaped Tip Firing PinNitrided tool steel. The CZ 457 part we're known for.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 5080062201.Shop Now →
Made in USAPete's PillarsExtended Cocking IndicatorStainless, replaces the factory plastic part.Shop Now →
Made in USAPete's PillarsSlim Helix Bolt KnobBillet aluminum, knurled helix pattern.Shop Now →
Made in USAPete's PillarsSlim Knurled Grooved KnobBillet aluminum with knurled grooves.Shop Now →
Made in USAPete's PillarsXL Finger Groove Bolt KnobKnurled XL knob for a full hand.Shop Now →
Made in USAPete's Pillars15 MOA Picatinny RailDovetail to Picatinny, 15 MOA.Shop Now →
Build the Match Gun
Pair It With a Match Barrel
Our match barrels first, plus Lilja, L3i and a complete CZ barreled action.
Made in USAPete's Pillars22" .960 Threaded StainlessMatch chamber, 1:16, 1/2-28 threads.Shop Now →
Made in USAPete's Pillars26" .960 Stainless MatchMatch chamber, recessed target crown.Shop Now →
Made in USAPete's Pillars16.5" .860 Blued ThreadedSuppressor-ready, 1/2-28 threads.Shop Now →
Made in USAPete's Pillars26" Sporter Taper ThreadedStainless sporter contour, threaded.Shop Now →
Lilja.900 26" Bull BarrelLilja match barrel, 1:16 twist.Shop Now →
L3i24" Drop-In Match BarrelWasp Match Chamber, shim kit included.Shop Now →
CZ457 Varmint MTR Barreled Action20.5" heavy barrel, MTR match chamber.Shop Now →
The Next Level
Put It in a Real Chassis.
- MDT ACC Elite CZ 457: the chassis this magazine's geometry was shaped for
- Deep ACC cavity, full ARCA, weight system for match work
- Your Choice: aluminum magwell and action parts (sold separately)
Want the Premier instead? See the MDT ACC Premier Gen2 CZ 457, or browse every chassis we carry.
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: Position7
MPN: CZ457-MAG-MPA-13RD
Capacity: 13 Rounds (12+1 Competition Load)
Caliber: .22 LR
Material: 7075 Billet Aluminum, CNC Machined
Finish: Black Hard Anodized
Body: Reduced-Curvature Profile with Individual Cartridge Witness Holes
Hardware: Steel Small-Head Torx Screws, Custom 13-Round Spring
Fits: CZ 457 and CZ 455 .22 LR (Factory, LRP, American, Varmint and MTR)
Tested Chassis: MDT CZ 457, Vision, Rome and MPA Vanquish
Magwell: Aluminum Magwell Recommended
Manufactured: Czech Republic
Frequently Asked Questions
Fitment, magwells, capacity and building out your CZ 457.
Will it fit my rifle?
It's built for CZ 457 and CZ 455 .22 LR rifles, and Position7 reports tested fit on factory configurations plus the LRP, American, Varmint and MTR. Fit can vary with your magwell, magazine catch and chassis, so check those if you're running an aftermarket setup.
Do I need an aluminum magwell?
It isn't strictly required, but it's strongly recommended. Seating an aluminum magazine against the factory polymer magwell over and over raises the risk of cracking the polymer. Use our PP457MW aluminum magazine well or the Position7 magwell kit.
Does it work in .17 HMR or .22 WMR?
No. This magazine is .22 LR only. Magnum rimfire cartridges need a different magazine.
Why does the straighter body matter?
A curved magazine sticks out further at the bottom, which is where it finds your rear bag, a barricade stop, or the wall of a deep chassis cavity. Angling the cartridges inside pulls the profile closer to straight, so the magazine clears those obstacles and your thumb reaches the release without hunting for it. It's most noticeable in an MDT ACC.
What if 13 rounds is too tall for my setup?
Position7 also makes a 10-round Shorty in the same billet aluminum, which sits closer to flush. If you want a lower profile for prone or positional work, start there. We also carry CZ factory and other aftermarket magazines.
Position7 or L3i billet magazines, which is better?
We only carry parts we trust, can stand behind and know are built with quality, so you're in good hands either way. L3i builds excellent billet magazines and magwells, and plenty of match shooters run them. Position7's advantage here is the reduced-curvature geometry and the 12+1 capacity, designed by a working PR22 world champion for exactly this kind of chassis work.
Does Pete's Pillars sell more than magazines?
Yes. We machine our own CZ 457 firing pins, cocking indicators, magazine releases, bolt knobs, rails, match barrels and pillar bedding, and we carry chassis from MDT, XLR and Grey Birch, barrels from Lilja and L3i, optics, bipods and reloading gear like the Area 419 ZERO press.
Small Change. Big Impact. Pete's Pillars.
POSITION7 CZ 457 BILLET ALUMINUM MAGAZINE | .22 LR | 13 ROUND
12+1 and a Straighter Body.
The Position7 CZ457-MAG-MPA-13RD is a 13-round .22 LR magazine CNC-machined from 7075 billet aluminum with a black hard anodized finish. Its reduced-curvature body angles the cartridges internally for a straighter profile, so it clears bags, barricade stops and tight chassis cavities that a curved factory magazine fights.
Precision rimfire is won in the small stuff: a magazine that seats clean, releases where your thumb already is, and doesn't catch the bag on the way out. Position7 built this one around that problem. You get a full 12+1 for a PRS or NRL22 stage, individual witness holes for every round so you can count a loaded magazine at a glance, and a body geometry that works in the deep cavity of an MDT ACC chassis. Use it for: NRL22, PRS rimfire, IPRF PR22, rimfire steel and any CZ 455 or 457 match build.
Designed Around the Chassis, Not the Rifle.
Most CZ magazines curve, because that's the easy way to stack rimfire cartridges. Position7 angled the cartridge placement inside the body instead, which pulls the external profile closer to straight. That buys you clearance where it matters: against a rear bag, over a barricade stop, and inside an MDT ACC cavity where a curved magazine can make the release hard to reach. The body runs on steel small-head Torx fasteners with a custom 13-round spring. Designed by Roman Konečný, the 2025 IPRF PR22 Senior Division World Champion, and tested over thousands of rounds. Made in the Czech Republic.
Read This Before You Load It.
An aluminum magazine is harder than the factory CZ 457 polymer magwell it drops into. Position7 recommends running an aluminum magwell with aluminum magazines, because repeated seating against polymer raises the risk of cracking the factory well over time. If your rifle is still on the original polymer magwell, plan on an aluminum one as part of this upgrade. We make the PP457MW aluminum magazine well, and Position7 offers a full RH billet magwell kit that pairs with this magazine.
Our Take
Give It an Aluminum Well: PP457MW
We've spent more than six years building, tuning and supporting CZ rimfire rifles, and the factory polymer magwell is one of the first things we replace on a match gun. The PP457MW is our machined aluminum replacement, and it's the part we'd put under this magazine. 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.
See the PP457MW →Pair It With
Position7 Magwell KitFull RH billet well for aluminum mags
PP457MRB Extended Release0.40" more reach for faster mag changes
Position7 10-Rd ShortyFlush-fit option when 13 is too tall
Made in USA
Complete the Bolt Refresh
The CZ 457 parts we machine ourselves, ready to ship from Michigan.
Made in USAPete's PillarsReshaped Tip Firing PinNitrided tool steel. The CZ 457 part we're known for.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 5080062201.Shop Now →
Made in USAPete's PillarsExtended Cocking IndicatorStainless, replaces the factory plastic part.Shop Now →
Made in USAPete's PillarsSlim Helix Bolt KnobBillet aluminum, knurled helix pattern.Shop Now →
Made in USAPete's PillarsSlim Knurled Grooved KnobBillet aluminum with knurled grooves.Shop Now →
Made in USAPete's PillarsXL Finger Groove Bolt KnobKnurled XL knob for a full hand.Shop Now →
Made in USAPete's Pillars15 MOA Picatinny RailDovetail to Picatinny, 15 MOA.Shop Now →
Build the Match Gun
Pair It With a Match Barrel
Our match barrels first, plus Lilja, L3i and a complete CZ barreled action.
Made in USAPete's Pillars22" .960 Threaded StainlessMatch chamber, 1:16, 1/2-28 threads.Shop Now →
Made in USAPete's Pillars26" .960 Stainless MatchMatch chamber, recessed target crown.Shop Now →
Made in USAPete's Pillars16.5" .860 Blued ThreadedSuppressor-ready, 1/2-28 threads.Shop Now →
Made in USAPete's Pillars26" Sporter Taper ThreadedStainless sporter contour, threaded.Shop Now →
Lilja.900 26" Bull BarrelLilja match barrel, 1:16 twist.Shop Now →
L3i24" Drop-In Match BarrelWasp Match Chamber, shim kit included.Shop Now →
CZ457 Varmint MTR Barreled Action20.5" heavy barrel, MTR match chamber.Shop Now →
The Next Level
Put It in a Real Chassis.
- MDT ACC Elite CZ 457: the chassis this magazine's geometry was shaped for
- Deep ACC cavity, full ARCA, weight system for match work
- Your Choice: aluminum magwell and action parts (sold separately)
Want the Premier instead? See the MDT ACC Premier Gen2 CZ 457, or browse every chassis we carry.
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: Position7
MPN: CZ457-MAG-MPA-13RD
Capacity: 13 Rounds (12+1 Competition Load)
Caliber: .22 LR
Material: 7075 Billet Aluminum, CNC Machined
Finish: Black Hard Anodized
Body: Reduced-Curvature Profile with Individual Cartridge Witness Holes
Hardware: Steel Small-Head Torx Screws, Custom 13-Round Spring
Fits: CZ 457 and CZ 455 .22 LR (Factory, LRP, American, Varmint and MTR)
Tested Chassis: MDT CZ 457, Vision, Rome and MPA Vanquish
Magwell: Aluminum Magwell Recommended
Manufactured: Czech Republic
Frequently Asked Questions
Fitment, magwells, capacity and building out your CZ 457.
Will it fit my rifle?
It's built for CZ 457 and CZ 455 .22 LR rifles, and Position7 reports tested fit on factory configurations plus the LRP, American, Varmint and MTR. Fit can vary with your magwell, magazine catch and chassis, so check those if you're running an aftermarket setup.
Do I need an aluminum magwell?
It isn't strictly required, but it's strongly recommended. Seating an aluminum magazine against the factory polymer magwell over and over raises the risk of cracking the polymer. Use our PP457MW aluminum magazine well or the Position7 magwell kit.
Does it work in .17 HMR or .22 WMR?
No. This magazine is .22 LR only. Magnum rimfire cartridges need a different magazine.
Why does the straighter body matter?
A curved magazine sticks out further at the bottom, which is where it finds your rear bag, a barricade stop, or the wall of a deep chassis cavity. Angling the cartridges inside pulls the profile closer to straight, so the magazine clears those obstacles and your thumb reaches the release without hunting for it. It's most noticeable in an MDT ACC.
What if 13 rounds is too tall for my setup?
Position7 also makes a 10-round Shorty in the same billet aluminum, which sits closer to flush. If you want a lower profile for prone or positional work, start there. We also carry CZ factory and other aftermarket magazines.
Position7 or L3i billet magazines, which is better?
We only carry parts we trust, can stand behind and know are built with quality, so you're in good hands either way. L3i builds excellent billet magazines and magwells, and plenty of match shooters run them. Position7's advantage here is the reduced-curvature geometry and the 12+1 capacity, designed by a working PR22 world champion for exactly this kind of chassis work.
Does Pete's Pillars sell more than magazines?
Yes. We machine our own CZ 457 firing pins, cocking indicators, magazine releases, bolt knobs, rails, match barrels and pillar bedding, and we carry chassis from MDT, XLR and Grey Birch, barrels from Lilja and L3i, optics, bipods and reloading gear like the Area 419 ZERO press.
Small Change. Big Impact. Pete's Pillars.
| Brand | Position7 |
| Gun Platform | CZ 457 |
| Type | Magazine |
| Capacity | 13 rds |