Design details FN FNC

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1 design details

1.1 operating mechanism
1.2 features
1.3 sights
1.4 accessories





design details
operating mechanism




the fnc selective fire weapon uses gas-operated long-stroke piston system , rotating bolt locking mechanism equipped 2 locking lugs engage corresponding recesses in barrel extension. bolt rotated , unlocked interaction of bolt s cam pin camming guide contained in bolt carrier. overall, mechanism resembles of kalashnikov rifles, adapted more advanced design , production methods. rear part of cocking handle slot, cut in upper receiver cocking handle, covered spring-loaded cover automatically opens handle when goes , automatically closes opening when cocking handle returns forward.


features

a german soldier aims fn fnc during belgian/german weapons qualification @ ramstein air base, germany, 2009.


the spring extractor located inside bolt head, ejector fixed , riveted inside of receiver housing. fnc uses 2-position gas valve, hammer-type firing mechanism , trigger fire selector switch simultaneously manual safety, securing weapon accidental firing. selector lever located on left side of receiver , has 4 settings: s - weapon safe, 1 - single fire mode, 3 - 3-round burst, - continuous (automatic) fire.


the fnc s barrel features flash suppressor used launch nato standard 22mm rifle grenades (only standard rifle model has capability). gas block contains gas valve setting used isolate gas system, providing increased volume of propellant required fire rifle grenade. sheet-metal gas valve switch when pulled upright, acts v-notch sight used aiming rifle grenades. piston head , extension, gas port block, barrel bore , chamber, hard-chrome plated minimize effects of propellant fouling.


the rifle feeds 30-round steel magazines interchangeable magazines american m16 rifle (stanag 4179 compliant). after last round fired, bolt remain closed there no provision automatic bolt hold open. however, bolt handle can manually worked hold bolt back. fnc magazines function in ar-15/m16-type rifles follower not hold bolt open on last round unless have been replaced m16-type follower.


the plastic-coated, lightweight alloy skeleton stock folds right side of receiver. fixed synthetic (polyamide) buttstock available.


the upper receiver made stamped steel, lower receiver, along magazine housing, made aluminum alloy.


sights

the rifle has flip-type l-shaped windage-adjustable rear sight 2 apertures settings 250 , 400 m, while front sight post adjustable elevation. optics such hensoldt 4× telescopic sight can attached use of receiver-mounted adapter.


accessories

standard equipment supplied fnc includes spike bayonet or variant of american m7 blade bayonet (with use of lug adapter) , sling. rifle can deployed barrel mounted bipod , blank-firing adaptor.








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