MSAR XM17-E4 .223 Rem Bullpup Semi-Auto, OD Green, 16.5 in Threaded Barrel, Integrated Fixed Optic, E4 STANAG Mag Compatible
The MSAR XM17-E4 is a U.S.-made .223 Rem bullpup that pairs a short-stroke gas-piston system with the E4 configuration accepting STANAG/AR-15 magazines. It features an integrated fixed-magnification carry-handle optic, a 16.5 in threaded barrel with an installed multi-ported brake/flash hider, and an OD green polymer shell. This discontinued model was produced in Bradford, Pennsylvania by a manufacturer that ceased operations in 2015.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: This firearm is in great shape overall. Minor scratches and blemishes are present on the exterior. The bore is clean and shiny.
What's Included
- Integrated carry-handle optic, fixed magnification
- 1x 30-round Mission First Tactical STANAG-pattern polymer magazine
- Multi-ported brake/flash hider (installed)
The XM17-E4 uses a compact bullpup layout with right-side ejection and a molded left-side panel. Controls include a cross-bolt safety, and the bolt release and magazine release are positioned at the rear grip/magwell area for direct access in the bullpup configuration. The receiver is metal, housed within an OD green textured polymer shell.
Its E4 configuration accepts STANAG/AR-15 magazines, and this rifle includes one 30-round Mission First Tactical polymer magazine. Capacity is 30+1, feeding the .223 Rem chambering.
The 16.5 in steel barrel is threaded and fitted with a multi-ported brake/flash hider featuring a crenellated crown. Short Picatinny accessory rail segments are located on the underside ahead of the trigger area and near the gas block, and the AUG-style vertical foregrip provides a secure forward hold. A rubber buttpad completes the stock assembly.
An integrated fixed-magnification optic is built into the carry handle for a clean, purpose-driven sighting setup. Manufactured in Bradford, Pennsylvania, this discontinued MSAR model represents the company’s approach to a U.S.-made bullpup using a short-stroke gas-piston system.