SG-43 Goryunov Semi-Auto Conversion Kit - Fits SG-43 & KGKT

Freedom Machine Works SG-43 Goryunov Semi-Auto Conversion Kit—the parts set you need to turn a demilled SG-43-pattern kit into a reliable, closed-bolt semi-auto belt-fed. The system emphasizes durability (material selection, heat treat) and factory-like repeatability with a simplified part count.

All-internal, no side box: the entire semi-auto fire-control/operating system fits inside the receiver for an authentic SG-43 profile—no external side-mounted box required. This listing is for the SG-43 kit; see notes below for KGKT and SGMT considerations.

• Operating mode: Closed-bolt semi-auto with purpose-built striker, firing pin, and disconnector geometry; includes an anti-bounce firing pin spring.
• What's included (kit contents): piston assembly (piston body & end, recoil spring, bushing, horseshoe retainer), striker/guide-rod/sear group, firing pin w/ anti-bounce spring, disconnector assembly, trigger link & anchor, pins/springs, and drawings/exploded views for fitment.

Compatibility: Designed for SG-43; also functions in KGKT. For KGKT builds you will need an SG-43 thumb trigger and safety bar (user-supplied).

Important: Professional gunsmithing recommended. Builder is responsible for proper assembly, headspace, and all local/state/federal compliance (including any required denial features).

? Download Instructions PDF: Kit Tutorial Guide

Here's a video from FMW showcasing the kit and its contents:

DISCLAIMER: Parts kits are subject to state-specific shipping restrictions and cannot be shipped to California, Connecticut, Hawaii, Illinois, Maryland, Massachusetts, New Jersey, New York, or Washington. Please visit our shipping restrictions page to review all applicable restrictions for your state. Subject to change.