SAG MK3 SLIM Chassis – 4-Slot M-LOK, Full-Length Rail (No Rear Sight Cutout)
- $1 399.00
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SAG MK3 SLIM Chassis – 4-Slot M-LOK, Full-Length Rail (No Rear Sight Cutout)
CNC-Machined Aluminum | Steel Inserts | Free-Floating Barrel | Slim 4-Slot M-LOK Handguard | Full-Length 1913 Monorail | Reusable
The SAG MK3 SLIM Chassis (S20048) 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 and reducing the rear sight base. CNC-milled from high-strength aluminum alloy with steel inserts and fasteners.
This full-rail version features a narrow 4-slot M-LOK handguard and an uninterrupted full-length 1913-MIL-STD top monorail – the rear sight is not retained, giving you a continuous optics platform over the barrel and receiver, from the gas block to the end of the shortened cover. Once installed, the chassis free-floats the barrel inside a tubular handguard. 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).
? Installation Note
Installation requires removing the factory handguard ferrule and reducing (trimming) the rear sight base for the full-length rail. This is the full-rail version; the factory rear sight is not retained.
This chassis is not suitable for self-installation on full-size carbines built on certain Molot Arms AKM-pattern receivers (MA-136-02, MA-136C, MA-136-05); those require a gunsmith workshop. Install in accordance with the manual.
? Key Advantages
- Full-length 1913 monorail – uninterrupted optics platform, no rear sight gap
- Slim 4-slot M-LOK handguard – lightweight, low-profile grip
- Free-floats the barrel – inside a tubular handguard
- No removal for cleaning – front rail stays on during field-stripping
- Folding-stock compatible – stock folds fully for transport
- Removable rear cover rail – for magnifier or NV attachment
- Reusable – can be reinstalled on a new carbine
Technical Specifications
| Material | High-Strength Aluminum Alloy (CNC-milled); steel inserts & fasteners |
| Product Code | SAG-S20048 |
| Handguard | Slim, 4-slot M-LOK |
| Top Rail | Full-length 1913-MIL-STD monorail (no rear sight cutout) |
| Rear Sight | Not retained (rear sight base reduced) |
| Rear Cover Rail | 1913-MIL-STD segment (removable section) |
| Barrel | Free-floating inside tubular handguard |
| Reusable | Can be reinstalled on a new carbine |
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, full rail)
- (1) Mounting Hardware Set
- (1) Installation Manual
FAQ
Q: What's the difference from the rear-sight-cutout version?
A: This full-rail version gives you an uninterrupted 1913 monorail; the rear sight base is reduced and the factory rear sight is not retained. The cutout version keeps the factory rear sight.
Q: Does it free-float the barrel?
A: Yes – the chassis free-floats the barrel inside a tubular handguard.
Q: Can I still use iron sights?
A: The chassis itself does not block iron sights, but this version reduces the rear sight base, so the factory rear sight is not retained.
Q: Do I need a gunsmith?
A: Certain Molot Arms AKM-pattern full-size carbines require a gunsmith workshop; install per the manual.
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.
One Continuous Optics Rail
? In Stock ? Guaranteed US Delivery ? CNC-Machined Quality
SAG Specs
General
Mounting & Rails
Recommended
SAG, Sureshot Armament, MK3 SLIM Chassis, Chassis, M-LOK, 4-Slot, Full-Length Rail, Free-Float, 1913 Rail, Slim Handguard, Chassis Systems, Bazalet