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Springfield Armory Backstrap Sleeve — Polymer, Black, 1-Piece — For XD-M Compact .45 ACP with #1 Backstrap (XD45381) — Informational Overview
The Springfield Armory Backstrap Sleeve is a grip fit component designed for the Springfield XD-M Compact platform in .45 ACP, specifically for configurations using the #1 backstrap (as listed). This item is identified by part number XD45381 and UPC 706397891602. It is described as a one-piece design made from polymer with a black finish, intended to fit the XD-M Compact grip system and provide a specific backstrap contour and feel.
Backstrap sleeves are commonly used to tailor grip circumference and hand fit, and they can also serve as replacement components if an original sleeve becomes worn, lost, or damaged.
Key Identifiers
Manufacturer/Brand: Springfield Armory
Component Type: Backstrap sleeve
Material: Polymer
Finish/Color: Black
Design: 1-piece
Compatibility (as listed): Springfield XD-M Compact .45 ACP
Backstrap Size (as listed): #1
Part Number / MPN: XD45381
UPC: 706397891602
What a Backstrap Sleeve Does (General Function)
A backstrap sleeve is designed to influence how a pistol grip fits the user’s hand. In general use, changing backstrap sizes can affect:
Grip circumference (how full the grip feels in the palm)
Trigger reach (how naturally the finger meets the trigger face)
Hand indexing for repeatable placement
Overall comfort during handling and practice
Because grip ergonomics are subjective, modular backstrap options are a practical way to adjust fit without permanent modification.
#1 Backstrap Designation: Fit and Ergonomics Notes
This sleeve is specified for the #1 backstrap configuration. Backstrap numbering typically corresponds to different sizes or contours within the XD-M Compact family. Users often select a backstrap size based on:
Exact differences between backstrap sizes are model-specific, so users typically refer to Springfield’s guidance for what “#1” represents in the .45 XD-M Compact configuration.
Polymer, One-Piece Construction: Practical Durability
This component is listed as a one-piece polymer sleeve. Polymer grip parts are commonly selected because they offer:
Low weight and good impact resistance
Resistance to moisture and temperature variations
Minimal maintenance requirements
Stable shape retention over time
A one-piece design can also simplify alignment and fit compared with multi-piece grip accessories, depending on the platform.
Compatibility Notes: XD-M Compact .45 ACP
The listing specifies compatibility with the XD-M Compact in .45 ACP. Because Springfield’s XD family includes multiple sub-series and generations, users typically confirm:
The pistol is specifically an XD-M Compact in .45 ACP
The grip system uses the same sleeve format intended for XD45381
The correct backstrap size (#1) matches the desired configuration
Manufacturer documentation confirms fit for the exact model
Matching by part number is usually the most reliable way to avoid fitment issues.
Installation and Safety Notes (General)
Grip components should be installed according to manufacturer instructions. Common best practices include:
Ensuring the firearm is unloaded and handled safely before installation
Confirming the sleeve is fully seated and properly retained
Verifying that controls operate normally after installation and that the grip feels secure
If unsure about fitment or installation, many owners consult a qualified armorer or gunsmith.
Quick Reference Summary
Springfield Armory Backstrap Sleeve
Polymer, black, one-piece
For XD-M Compact .45 ACP with #1 backstrap (as listed)
MPN: XD45381
UPC: 706397891602
The End
