When properly adjusted, the M1A rifle can reliably run a full-size sound suppressor.

Rightly so, as they are slowing down the gasses leaving the barrel, which in turn suppresses the report of the round being fired. This is problematic for suppressors as they create a lot of back pressure. The M1A was tuned specifically for reliability and accuracy, not adjustability. The M1A vents gas out of a port near the muzzle that faces downwards, bleeding off excess gas as the bullet leaves the barrel. The author demonstrates how the M1A can be suppressed with the use of a Delta P Design muzzle adaptor.

The gas system is fixed and non-adjustable, and the muzzle threads - or lack thereof - are not standard 5/8×24, which is what is needed for most muzzle devices. How can you make one of the all-time coolest guns in history even cooler? By adding a suppressor, obviously! Now, you might be saying, Jeremy I rarely see suppressors on the M1A why is that? I am glad you asked! In this article and video above I’ll be going over how exactly we accomplished this task, some benefits and some of the downsides.įirst off, let’s understand how the M1A operates. The M1A line was never designed from the factory to be suppressed.

M1a socom accuracy test