The recce collars were designed for NSWDG recce rifles to mount the M4-Recce suppressor.
There are two variants of the recce collar.
M4 Recce: This was designed for the 16.5″ M4 recce barrels. These will work with AE Recce barrels or with Lilja M4 barrels (additional gunsmithing is required for the Lilja barrel).
416 Recce: This was designed for 14.5″ SOCOM profile 416 barrels. These will work with factory HK 416 SOCOM barrels or with Nefarious Arms 416 SOCOM barrels.
