Allen Engineering M4-Delta | OPS Grey

The Allen Engineering M4-Delta (M4-D) is a reflex-style rifle suppressor based on one of Allen Engineering’s earliest designs and a predecessor to the standardized OPS Inc suppressor lineup. The M4-Delta is closely associated with the Gordon Carbine configuration and the historical carbine setups of the 1990s. This OPS Grey version retains the traditional profile and mounting arrangement associated with the original design.

The M4-Delta is designed to sleeve rearward over a compatible 14.5-inch carbine barrel and index on a 3-piece M4/Gordon-style collar positioned at the front sight base. Its reflex configuration results in an overall length of 9.75 inches while adding approximately 5.25 inches beyond the muzzle. The M4-Delta designation distinguishes this model from other Allen Engineering suppressors sometimes informally referred to as the "AE M4" or "AEM4."

Specifications

• Overall Length: 9.75 in
• Length Added from Muzzle: 5.25 in
• Diameter: 1.5 in
• Weight: 24 oz
• Mount Style: M4-Delta
• Design: Reflex / Over-the-Barrel
• Finish: OPS Grey
• Intended Barrel Configuration: 14.5 in Carbine Barrel
• Collar Interface: 3-Piece M4 / Gordon-Style Collar
• Indexing Location: Front Sight Base
• Platform Association: Gordon Carbine
• Design Lineage: Early Allen Engineering / Pre-Standardized OPS Inc Design