AE – 7 x 7 Collar (.745 ID)

The Allen Engineering 7 x 7 Collar .745 ID is available now from LM Ironwerks, a licensed FFL/SOT dealer in Louisville, Kentucky.

Formerly known as the M4 Collar. The 7×7 Collar was renamed to avoid confusion with the M4 suppressors which they are not compatible. The name “7×7″ comes from the step the collar sits on. The step is roughly .700″ past the shoulder and the diameter of the barrel between the shoulder and the step is also around .700″. This is a very common step among a variety of barrels.

Designed to fit barrels with a .745″ barrel diameter after the 7×7 step.

Available in both A-Mount and B-Mount configurations.

Buying the Allen Engineering 7 x 7 Collar .745 ID from LM Ironwerks

It ships directly to the address you enter at checkout, so no dealer transfer is needed. In addition, our team reviews every order before it ships. Have a question about fit or compatibility? Contact us before you order and we’ll help. Looking for something different? Browse all of our suppressor parts.