This document is the G3 Armorer's Manual, which provides instructions for maintenance and repair of the Cal. 7.62 mm x 51 rifle. The content includes checking the rifle, sighting-in, adjusting the rear sight, checking the headspace, replacing the flash hider and ensuring proper installation of the rifle grenade, cleaning the barrel, cocking lever housing and magazine release lever, checking all assemblies and subassemblies for proper seat, removing dents in the receiver and cocking lever housing, inspecting the bore for powder residues and checking bore diameter, checking the rear and front sight, replacing if necessary, checking the cocking device, replacing if necessary, checking the magazine catch, replacing if necessary, stripping, cleaning and checking the bolt assembly, checking the firing pin protrusion and shape, checking the extractor protrusion, replacing bolt components, replacing the locking rollers, replacing the bolt head locking lever, cleaning and checking the grip assembly, cleaning and checking the back plate and butt stock, replacing back plate, butt stock and buffer, replacing the recoil spring, checking the magazine, checking the magazine housing, checking the handguard, checking the carrying sling.
This document serves as the Armorer's Manual for the Heckler & Koch G3 rifle (Cal. 7.62 mm x 51). It provides detailed instructions for maintenance, repair, and inspection, applicable to models with both fixed and retractable butt stocks. The manual covers essential operational checks such as verifying the rifle is unloaded, sighting-in procedures, and adjusting the rear sight for elevation and windage.
| Caliber | 7.62 mm x 51 |
|---|---|
| Elevation adjustment rate | 3.3 cm (1.29 in.) per click at 100 m |
| Windage adjustment rate | 13.2 cm (5.19 in.) per revolution at 100 m |
| Head space gap | 0.1—0.5 mm (0.004—0.020 in.) |
These instructions apply to the G3 Rifle with Fixed and Retractable butt stock.
A rear sight adjusting tool (1013 W4) and a Phillips-head screwdriver are required.
The flash hider is loosened by means of the universal spanner and then removed.