YANKEE HILL MACHINE COMPANY 3-LUG HEAVY DUTY ADAPTER .45

Description

The YHM-2051 is a heavy-duty 3-lug adapter built for .45 caliber hosts that see hard use. Where a standard 3-lug adapter may show wear over time under sustained fire, this design addresses that by enclosing the mounting interface entirely rather than leaving it exposed, distributing stress across the assembly rather than concentrating it at a few contact points. That construction choice is what makes it rated for full-auto use.

The mounting interface itself is machined from 17-4 PH stainless steel, a precipitation-hardened alloy chosen here because it holds its dimensions under heat and repeated mechanical cycling better than standard stainless grades. The Black Oxide finish gives it corrosion resistance without adding meaningful thickness that could affect fit. The hub-compatible 1-3/8-24 threads at the rear allow it to work with any suppressor using that thread standard, which covers all steel centerfire YHM suppressors as well as a wide range of other manufacturers.

Beyond .45, the adapter is rated for 300 Blackout subsonic — useful if a host sees duty across calibers, though that rating does not extend to supersonic 300 Blackout loads. The B&T 3-lug standard it conforms to is a widely adopted pistol suppressor mounting specification, so compatibility with B&T-pattern suppressors is straightforward. For shooters running a .45 host in demanding conditions where longevity of the attachment system matters more than keeping weight to an absolute minimum, this adapter is the purpose-built solution in YHM’s lineup.