The Locking Block – G42, SKU 100700141 is a factory Glock OEM frame component designed to support proper barrel locking and unlocking in subcompact single-stack pistols such as the G42, G43, G43X, and G48. Identified by manufacturer part number 33216, this locking block is built to Glock’s original specifications and is intended as a direct replacement for the original part in compatible models or for use in completing a stripped Glock 42–series frame. Ghost Inc.+3Brownells+3Shooting Surplus+3
Compatibility and Model Coverage
Although listed as “Locking Block – G42” under SKU 100700141, this part is widely cataloged as compatible with multiple slimline Glock models. Retail and OEM listings specify use with: Shooting Surplus+2glockparts.com+2
Glock G42
Glock G43
Glock G43X
Glock G48
This shared locking block geometry allows a single OEM part to service several related models, simplifying parts sourcing for armorers and end users who maintain more than one slimline Glock pistol. Users should always verify compatibility with their specific model and generation before installation.
OEM Construction and Quality
The Locking Block – G42 (MPN 33216) is a Glock factory original (OEM) part, manufactured to the same tolerances and using the same materials as the components installed at the factory. Vendor descriptions emphasize factory reliability, quality construction, and consistent performance, reflecting Glock’s design and production standards for critical frame parts. ammocitysupply.com+3glockparts.com+3robertrtg.com+3
Key construction attributes include:
Hardened metal locking surface for repeatable engagement with the barrel lug
Precision-machined geometry for correct fit in the polymer frame insert pocket
OEM finish and dimensions to maintain original slide, barrel, and frame alignment
Because it is an OEM component, the locking block is designed to drop in to compatible frames without modification when installed correctly by a qualified armorer or gunsmith.
Functional Role in the Glock Operating System
In the Glock tilting-barrel system, the locking block is a structural frame insert that provides a hardened bearing surface for the barrel’s locking lug. During firing and cycling, the locking block:
Supports the locked relationship between barrel and slide at the moment of discharge
Guides the unlocking and downward tilt of the barrel as the slide reciprocates
Helps distribute recoil and impact forces into the frame in a controlled manner
Maintaining the proper condition and geometry of the locking block is important for reliable feeding, extraction, and consistent lockup. Replacement with a genuine OEM unit is commonly recommended when the original part shows damage, peening, or excessive wear. GlockStore+2glockparts.com+2
Use Cases: Replacement, Repair, and Frame Builds
The Locking Block – G42 100700141 is typically used in three main scenarios:
Routine or Corrective Replacement
To restore factory specifications when the original locking block is worn, damaged, or visibly deformed.
To maintain factory-level reliability in high-round-count pistols used for training or duty. glockparts.com+1
Completing a Stripped Frame
Standardization Across Multiple Pistols
Owners of several slimline Glock models (G42, G43, G43X, G48) may keep this part on hand as a common spare, since a single locking block part number 33216 covers multiple platforms. glockparts.com+2Top Gun Supply+2
In each case, using an OEM part helps maintain the original design relationship between slide, barrel, and frame components.
Installation and Armorer Considerations
Although many experienced users can disassemble a Glock frame, the locking block is a critical structural and safety component. Retail listings commonly note that some parts “may need to be installed by a qualified gunsmith” to ensure correct seating, pin alignment, and function checks. Livengood Guns+1
Basic installation considerations include:
Removal and reinstallation of the relevant frame pins using appropriate tools
Verifying that the locking block seats fully in the frame recess without rocking or gaps
Function-testing the pistol after installation (trigger reset, slide cycling, and safe operation checks performed with the firearm unloaded)
Improperly installed frame components can lead to malfunctions or unsafe conditions, so professional installation is recommended if there is any uncertainty.
Part Numbers, SKU, and Catalog Data
For search, cataloging, and inventory management, this Glock locking block is typically listed with the following identifiers:
Including these exact identifiers in product pages and internal databases helps ensure that customers searching for “Locking Block G42 100700141,” “Glock 33216 locking block,” or “G42/43/43X/48 OEM locking block” are directed to the correct replacement part.
Summary
The Locking Block – G42 100700141 (Glock MPN 33216) is a genuine OEM Glock frame component designed for use in the G42, G43, G43X, and G48 slimline pistols. Manufactured to factory specifications, it provides the hardened bearing surface and precise geometry required for proper barrel lockup, smooth cycling, and long-term reliability. Whether used as a direct replacement, as part of a frame rebuild, or as a standardized spare for multiple compact Glock models, this locking block offers factory-level fit and performance in a compact, drop-in part. Brownells+3glockparts.com+3Top Gun Supply+3
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