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
| Weight | 1 lbs |
|---|---|
| Dimensions | 6.5 × 4.5 × 1.5 in |
| UPC | 817272010183 |
| MPN | AC28 AC1518 |
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
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″.
Aggressive texture for increased traction and stability on most surfaces with integral QD socket.
Modular scope cap allows for attaching accessory sighting systems at the left or right 30 degree offset, or in the 12 o’clock position. Compatible with all appropriate size KAC scope mounts.
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