Ruger Mark IV 22/45 .22 LR, Custom 2 inch Threaded Barrel by Parker Mountain Machining, Lobos Industries 507K Micro‑Dot Mount, Black Oxide, 2022
This customized Ruger Mark IV 22/45 stands out with a professionally shortened and threaded 2 inch barrel by Parker Mountain Machining, a Lobos Industries micro‑dot adapter plate for the 507K footprint, and a gold‑colored aftermarket trigger shoe. Built on the 22/45 polymer frame with removable grip panels, it retains the Mark IV one‑button takedown and a clean, adjustable rear notch sight with the front sight removed.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This firearm is in great shape. There are minor and superficial scratches and blemishes present.
What's Included
- Lobos Industries micro‑dot adapter plate for 507K footprint (installed)
- Shortened threaded barrel (installed)
- Aftermarket gold-colored trigger shoe (installed)
- 1x 10-round steel magazine
The cylindrical steel upper/receiver features a right‑side ejection port and an integral rear sight base. The receiver is drilled and tapped, and a Lobos Industries micro‑dot adapter plate for the 507K footprint is installed. The rear sight is an adjustable notch; the front sight has been removed as part of the custom configuration.
Parker Mountain Machining shortened the steel barrel to approximately 2 inches and added a threaded muzzle, creating a compact, threaded setup. The upper/receiver retains its factory black oxide finish, while the newly cut threaded muzzle and its shoulder are left in-the-white (bare steel).
The 22/45 polymer frame includes removable grip panels with Ruger phoenix emblems, paired with a push‑button magazine release and a manual thumb safety. A gold‑colored aftermarket trigger shoe is installed.
The Mark IV one‑button rear takedown latch provides straightforward disassembly. Capacity is 10+1 rounds of .22 LR, and this example was manufactured in 2022 in the USA.