SAG MK3 SLIM Chassis - 4-Slot M-LOK with Rear Sight Cutout

The SAG MK3 SLIM Chassis (S20050) by Sureshot Armament Group is a complete solution for mounting lighting and optic devices on a sporting platform without any modification to the original carbine beyond removing the factory handguard ferrule. CNC-milled from high-strength aluminum alloy with steel inserts and fasteners.

This SLIM version features a narrow 4-slot M-LOK handguard and a rear sight cutout (RSB) that preserves the factory rear sight. Once installed, the chassis free-floats the barrel inside a tubular handguard and provides a 1913-MIL-STD top monorail over the barrel and receiver, from the gas block to the end of the shortened cover. The front rail section does not require removal for field-stripping, the stock still folds completely, and the iron sights are not blocked. The removable rear cover section carries its own 1913 segment for optics that don't need to retain zero (magnifier, NV attachment).

Technical Specifications

Compatibility

Designed for full-size sporting platforms. See the compatibility filter on this page to confirm fitment for your specific platform.

What's Included

• (1) SAG MK3 SLIM Chassis (4-slot M-LOK, RSB)
• (1) Mounting Hardware Set
• (1) Installation Manual

FAQ

Q: What does the rear sight cutout do?
A: It preserves the factory rear sight so you keep your iron sights after installing the chassis.

Q: How is the SLIM version different?
A: It has a narrow 4-slot M-LOK handguard for a lighter, lower-profile grip compared to the wider chassis versions.

Q: Does it free-float the barrel?
A: Yes - the chassis free-floats the barrel inside a tubular handguard.

Q: Do I need a gunsmith?
A: Most installs require only removing the handguard ferrule. Certain Molot Arms AKM-pattern full-size carbines require a gunsmith workshop.

Q: How does shipping work?
A: US orders are fulfilled and delivered through our partner's domestic US logistics network. Delivery is not express, but it is reliable and fully guaranteed.