L3i Design Solutions CZ 457 Parts · Billet Magazines · Match Barrels
L3i builds precision upgrades for the CZ 457, from billet aluminum magazines to a drop-in match barrel and a 10 MRAD scope base. As an authorized L3i dealer, we carry L3i magazines, the L3i drop-in barrel and the 10 MRAD base, alongside the CZ parts that complete the build.
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Magazines, barrels and scope bases for the CZ 457.
Billet Magazines
CZ 457 billet aluminum 22LR magazines in 10 and 13 round capacities.
Shop L3i MagazinesDrop-In Match Barrel
The L3i 24 inch drop-in match barrel for the CZ 457.
Shop L3i Barrel10 MRAD Scope Base
The L3i CZ 457 Picatinny scope base with 10 MRAD of built-in elevation for extended range.
Shop L3i BaseFind your L3i.
L3i parts are made for the CZ 457. Pick your upgrade, then confirm fitment on the product page.
Complete Your CZ 457
L3i covers the mags, barrel and base. These are the CZ parts that finish the build.
Pete's Pillars CZ 457 Rails
USA-made 11mm dovetail to Picatinny rails in 0, 15 and 30 MOA.
Shop Our RailsBillet Bolt Knobs
Six Pete's Pillars CZ 455 and 457 knob profiles, machined in the USA.
Shop Bolt KnobsExtended Mag Release
The Pete's Pillars extended CZ 455 and 457 magazine release for faster mag changes.
Shop Mag ReleaseLilja & Pete's Barrels
Lilja straight taper bull barrels and Pete's Pillars CZ 457 match barrels.
Shop CZ BarrelsCZ 457 Triggers
Timney and TriggerTech drop-in triggers and trigger springs.
Shop CZ TriggersFiring Pins & Extractors
Pete's Pillars and Position7 firing pins, extractor springs and extractor sets.
Shop Action PartsPosition7 Upgrades
The Pro Scope Base, billet magazines and magwell kits.
Shop Position7CZ 457 Chassis & Stocks
KRG Bravo, MDT and more for NRL22 and precision rimfire.
Shop CZ ChassisUpgrade the Rifle
Barrels, triggers and chassis to build out your CZ 457.
Accessories & Gear
Magazines, mag parts and support gear.
Two Ways to Mount Your CZ
The L3i 10 MRAD base adds a lot of built-in elevation for long range rimfire. Want a different cant? Our Pete's Pillars CZ 457 rails come in 0, 15 and 30 MOA, so you can match the rail to your scope's travel and the distances you shoot.
Building With L3i
Billet magazines
L3i billet aluminum magazines add capacity and durability over factory CZ magazines, a common upgrade for NRL22 and rimfire competition.
Drop-in match barrel
The L3i 24 inch drop-in barrel uses the CZ 457 interchangeable barrel system. Follow the manufacturer's instructions, and have a gunsmith check headspace if you are unsure.
10 MRAD scope base
A 10 MRAD base adds about 34 MOA of elevation, giving your scope room to reach extended rimfire distances. Check your scope's total elevation travel before choosing a heavily canted base. Our scope bases page explains MOA and MRAD.
Finish the build
Pair your L3i parts with a trigger, a chassis and a scope for a complete precision rimfire.
L3i FAQ
Will L3i magazines fit my chassis?
L3i billet magazines are made for the CZ 457. Most stocks and chassis that accept CZ 457 magazines will accept them. Check your chassis fitment notes.
What does 10 MRAD mean on a scope base?
MRAD is a unit of angle. A 10 MRAD base tilts the scope to add built-in elevation, about the same as a 34 MOA base, so the scope can reach farther before running out of adjustment.
Is the L3i barrel a drop-in?
Yes. The L3i 24 inch barrel is a drop-in barrel for the CZ 457 interchangeable barrel system. Verify headspace if you have any doubt.
10 or 13 round magazine?
The 13 round magazine gives you more capacity per stage, while the 10 round sits a little shorter. Check your match rules and how the magazine clears your bag or barricade.
Keep Building
More from the bench.
CZ 457 Parts
Every CZ 455 and 457 upgrade we carry, including our own parts.
Explore CZ 457Scope Bases
Flat and canted scope bases in MOA and MRAD.
Shop Scope BasesRifle Magazines
AICS, PMAG, rimfire and pistol magazines and magazine parts.
Shop MagazinesShop All Brands
Every manufacturer we carry in one place, from MDT and Volquartsen to our own USA-made parts.
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