Basically, a tri lug adapter will never be useful for extreme accuracy or precision work. What this means is, your point of impact on a target may vary slightly from your point of aim, depending on how the 3 lug adapter is oriented when you put it on your firearm. Then, the spring holds pressure on the taper and the back of the lugs as you rotate it on.ģ lug also can have some point of impact shift. Tri lug works by the taper on the front of the lugs, aligning with a taper on the inside of the adapter. With extended use, these can wear out, and do need to be replaced from time to time.

You will also always want to make sure the spring in your adapter is fairly stiff. 3 lug is also limited to use with pistol calibers, and because of the design, the springs, and gaskets in the mechanism, it cannot take the heat generated from rifle calibers. However, there have been a few silencers over the years with the tri lug as the permanent, and only attachment method built in the back of certain silencers. In most cases your 3 lug adapter will thread into the back of your silencer. These 3 lug adapters can sometimes be rather expensive in relation to other adapters, but definitely worth it in the end. You can buy a threaded adapter to allow your firearm to accept a tri lug mount, but that is an added cost.

Typically, only a few companies actually use 3-Lug on their barrels these are usually limited to Hk, Brugger and Thomet, and Noveske. But, the 3 Lug adapter does come with some limitations and nuances that you need to consider before using it on your firearm. That very unlikely history brought us to one of the most popular mounting systems for pistol caliber suppressors today. It’s not clear if this was the first ever, but probably, the first in the United States. However, an engineer named Tim Bixlar, who worked for Knights Armament and AWC patented the first 3-Lug adapter to be used with a silencer in the United States in 1988. It’s not known exactly when the first silencer was used with the 3-Lug adapter. The MP5 SD version had a very large silencer that threaded onto the back of the barrel, and the Navy version featured both 1/2x28 threads and 3-Lug the way you see many guns with 3-Lug today, and the silencer issued with that attached to the threads. These 3-Lug mounts were originally added to the MP5 in 1966 for the quick attachment of a flash suppressor, blank firing adapter, or grenade launcher.Īctually, the first official MP5 Silencers were direct thread. Interestingly enough, they originally weren't intended to be used with silencers. Tri lug adapters were originally developed by Heckler and Koch for the quick attachment of accessories to the MP5.

How to install mp5 barrel