Our pistons were designed to be easily changed for different host firearms or calibers. Pistons are built with 17-4 stainless steel, then heat-treated for maximum durability. The piston is part of the Nielson device that moves and allows semi-automatic cycling for unlocking pistol barrels. Throw a Fixed Barrel Spacer on for fixed barrel applications. SilencerCo pistons have female threading that attaches to our SilencerCo threaded barrels.
Not sure which threads you need? Check our Piston Fit Guide
Compatible with
Omega K Series
Hybrid 46
Hybrid 46M with Charlie Piston Mount
Osprey Series
Octane Series
Omega 36M with Charlie Piston Mount
Out of stock
AC59
https://kfarmory.com/wp-content/uploads/2024/11/SILENCERCO_AC59_PISTON-WEB.jpg
Weight | 1 lbs |
---|---|
Dimensions | 6.5 × 4.5 × 1.5 in |
UPC | 817272010237 |
MPN | AC59 |
Scope mount for day optics.1.94″ right height and forward position for extended eye relief. One piece construction.
Ring Size: 34mm
Right Height: 1.94″
Weight: 7.4oz
URX 4 The URX 4 is a continuous top-rail system that utilizes the Keymod mounting brackets developed by Vltor and Noveske. This rail system is built stronger and more stable than previous designs due to the absence of a removable bottom rail. The modular layout allows an end user to fully customize exactly where to place accessories without the use of specialized tools, small parts, or additional forces applied to the barrel.
The URX 4 is currently available for 5.56 rifles in 8.5, 10, 10.75″, 13, and 14.5 lengths, and is equipped with Knights unique IBN mounting configuration. The idea was to create a more modular, and thus more serviceable, rail system that still maintains its strength and stiffness. The IBN system torques the rail onto the weapon and allows the rail to act as the barrel nut. This design was developed to increase stabilization and provide a simpler solution that requires less specialized tools to install and maintain.
A full array of modular accessories, iron sights, and panel kits utilizing the Keymod mounting brackets have been developed specifically to accompany this rail system. With the introduction of the URX 4, Knights Armament Company demonstrates its continuing determination to intelligently design effective products.
Two QD sling swivel sockets built in at the rear of the rail. Includes shim kit and installation wrench.
The KAC URX 4 Rail is a fully modular design that utilizes the revolutionary KeyMod accessory mounting system. The URX 4 Rail is stronger and more stable than previous URX designs due to its one piece construction. It is also lighter due to its Integral Barrel Nut (IBN) system of attachment. The IBN system allows the rail itself to act as the barrel nut when torqued onto the rifle, completely eliminating the need for a separate steel barrel nut. KeyMod accessories may be mounted anywhere along the URX 4s length, making it one of the most user configurable designs on the market. The URX 4 includes two QD sling swivel sockets, one on the left side and one on the right.
Specifications:
Length: 10.75″
Weight: 10.2 oz
Inside Diameter: 1.55″
Outside Diameter: 1.68″ (Side to Side)
Each URX 4 Rail comes complete with an installation wrench, shim kit and instructions. Other lengths available include 8.5″, 10″, 13″, and 14.5″.
This 7-Piece Shim Set is for use in properly timing a flash hider or muzzle brake with KAC ¾-24 threads that index off of the muzzle. Kit includes 7 shims and Rockset adhesive.
Shim Sizes:
Shim set for SR-25/M110 muzzle threads using KAC standard ¾-24 muzzle devices.
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