OPPRESSOR Universal — Multi-Caliber Blast Shield
Aim blast and concussion forward while keeping your muzzle device’s recoil reduction. The OPPRESSOR Universal works with most comps/brakes/flash hiders up to 25 mm OD and covers .223/5.56, .308/7.62, and 9 mm. A proprietary 3-lug quick-detach base lets you snap it on or off with a push and slight turn—perfect for indoor ranges, public lines, or training next to teammates.
Simple setup: install the SI 3-lug QD base with the included crush washer (choose 1/2" or 5/8"), time your muzzle device, and you’re ready. Run the rifle with or without the OPPRESSOR installed.
Product Features
- Works with muzzle devices up to 25 mm (0.98") maximum outer diameter
- Proprietary 3-lug quick-detach base for fast on/off
- Internal geometry redirects blast/sound forward while preserving device efficiency
- Steel core with 6061-T6 aluminum body
- Practical courtesy at the line—be kinder to shooters beside you
Product Specifications
- Weight: 7.85 oz (reference: SI OPPRESSOR 9.40 oz / OPPRESSOR LITE 6.50 oz)
- Overall Diameter: 41 mm (1.61")
- Overall Length: 85.52 mm (3.37")
- Materials: Core—steel; Body—6061-T6 aluminum
- Finish: Anodized body
- Calibers: .223/5.56, .308/7.62, 9 mm
Package Contents
- SI OPPRESSOR Universal body (fully assembled)
- SI proprietary 3-lug quick-detach base
- AR crush washer for .223/5.56/9 mm (1/2")
- AR crush washer for .308/7.62 (5/8")
- Shim (for 1/2" barrels as needed)
- Warning card
- Installation order card
Compatibility
- Barrel threads: 1/2" and 5/8"
- Muzzle devices: up to 25 mm OD maximum
- Overall diameter of OPPRESSOR Universal: 41 mm
Handguard Fit Note
- Not intended for tucked/integrated use inside Strike handguards
