Out of stock
SKU: CSCGSKRK1351LHB
UPC: 850002123166
MPN: CGS-KRK-13.5X1LHBK
The CGS Group Piston 13.5x1LH Black provides the thread interface needed to mount CGS Kraken, MOD9, and Nautilus series suppressors to firearms with M13.5x1 left-hand barrel threads. This thread pitch is commonly found on certain European pistols and select aftermarket threaded barrels. Machined from 17-4 stainless steel and finished in corrosion-resistant black nitride, this piston delivers the material strength and surface hardness required for repeated attachment cycles under suppressed fire. Shooters running 9mm suppressor hosts with left-hand threading will find this component essential for their CGS silencer setup.
CGS engineered this piston with a self-aligning system that ensures concentric bore alignment during installation, reducing the risk of baffle strikes that can result from misaligned suppressor mounts. The positive spoke lock mechanism secures the piston firmly within the suppressor housing, preventing rotation or loosening during strings of fire. The MOD9 platform offers 12 index points for piston positioning, allowing shooters to fine-tune point-of-impact shift when running suppressed. The 17-4 stainless steel construction provides excellent tensile strength while the black nitride treatment adds lubricity and wear resistance at the thread interface. This combination of materials handles the thermal cycling and mechanical stress inherent to suppressed handgun operation.
This piston serves shooters who own CGS suppressors and need to expand their host gun compatibility to include barrels threaded in M13.5x1 left-hand. Whether you are building a dedicated suppressor host or want to swap your CGS silencer between multiple firearms, having the correct piston on hand eliminates downtime at the range. Pair this with our selection of holsters rated for suppressor-height sights or browse our firearms inventory for threaded-barrel handguns ready for suppressor use. We stock CGS pistons and accessories to keep your silencer system running across your entire collection.
This piston is designed specifically for CGS Kraken, MOD9, and Nautilus series suppressors. It will not work with suppressors from other manufacturers that use different piston systems or mounting interfaces.
The M13.5x1 left-hand thread pattern appears on certain European pistol barrels, notably some HK and Walther models, as well as select aftermarket threaded barrels. Verify your barrel's thread pitch before ordering.
The self-aligning feature allows the piston to center itself during suppressor attachment, promoting proper bore alignment between the barrel and suppressor. This reduces the risk of baffle strikes caused by misalignment during installation.
On the MOD9 suppressor, the piston offers 12 index points that allow you to rotate and lock the piston at different positions. This adjustment can help compensate for point-of-impact shift that sometimes occurs when shooting suppressed.
Black nitride is a surface hardening treatment that increases wear resistance and provides corrosion protection. It also adds lubricity to the threads, making installation and removal smoother over repeated use cycles.
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