How a SIG SG 510 Rifle Works

Wikipedia Specs:
Type Battle rifle
Place of origin Switzerland
Service history
In service 1957–present
Production history
Designer Rudolf Amsler
Designed 1950s
Manufacturer Schweizerische Industrie Gesellschaft (SIG)
Waffenfabrik Bern
Swiss subcontractors
Produced 1957–1985
Variants SG 510-1, SG 510-2, SG 510-3, SG 510-4, SG 510-5, SG 510-6, SG 510-7 T (SIG-AMT), PE-Stgw. 57
Specifications
Mass 5.70 kg (12.57 lb) (Stgw. 57)
4.37 kg (9.63 lb) (SG 510-4)
Length 1,100 mm (43.3 in) (Stgw. 57)
1,015 mm (40.0 in) (SG 510-4)
Barrel length 609 mm (24.0 in) (Stgw. 57)
505 mm (19.9 in) (SG 510-4)
Cartridge 7.5×55mm GP 11 (Stgw. 57)
7.62×51mm NATO (SG 510-4)
Action Roller-delayed blowback
Rate of fire 450–600 rounds/min
Muzzle velocity 750 m/s (2,460 ft/s)
Effective firing range 640 m (700 yd) iron sights
800 m (875 yd) Kern 4×24 optical sight
Feed system 6-, 20-, or 24-round detachable box magazine
Sights Front post, rear aperture