<Table> <Tr> <Th colspan="2"> SAR 21 </Th> </Tr> <Tr> <Td colspan="2"> The SAR 21 with the attached Round Corner Firing ( RCF ) module </Td> </Tr> <Tr> <Th> Type </Th> <Td> Bullpup assault rifle </Td> </Tr> <Tr> <Th> Place of origin </Th> <Td> Singapore </Td> </Tr> <Tr> <Th colspan="2"> Service history </Th> </Tr> <Tr> <Th> In service </Th> <Td> 1999 -- present </Td> </Tr> <Tr> <Th> Used by </Th> <Td> See Users </Td> </Tr> <Tr> <Th colspan="2"> Production history </Th> </Tr> <Tr> <Th> Designer </Th> <Td> Tuck Wah Chee and Felix Tsai of Chartered Industries of Singapore ( CIS , now ST Kinetics ) </Td> </Tr> <Tr> <Th> Designed </Th> <Td> </Td> </Tr> <Tr> <Th> Manufacturer </Th> <Td> CIS : 1999 -- 2000 ST Kinetics : 2000 -- present </Td> </Tr> <Tr> <Th> Produced </Th> <Td> 1999 -- present </Td> </Tr> <Tr> <Th> Variants </Th> <Td> See variants </Td> </Tr> <Tr> <Th colspan="2"> Specifications </Th> </Tr> <Tr> <Th> Weight </Th> <Td> SAR 21 : 4 kg ( 8.82 lb ) SAR 21 GL / M203 : 5.3 kg ( 12 lb ) SAR 21 P - Rail : 3.6 kg ( 7.9 lb ) SAR 21 MMS : 3.5 kg ( 7.7 lb ) SAR 21 Light Weight Carbine 3 kg ( 6.6 lb ) </Td> </Tr> <Tr> <Th> Length </Th> <Td> 805 mm ( 31.7 in ) ( SAR 21 , SAR 21 40 GL / M203 , SAR 21 P - Rail ) 680 mm ( 26.8 in ) ( SAR 21 MMS ) 640 mm ( 25.2 in ) ( SAR 21 Light Weight Carbine ) </Td> </Tr> <Tr> <Th> Barrel length </Th> <Td> 508 mm ( 20.0 in ) </Td> </Tr> <Tr> <Td colspan="2"> </Td> </Tr> <Tr> <Th> Cartridge </Th> <Td> 5.56 × 45mm NATO </Td> </Tr> <Tr> <Th> Caliber </Th> <Td> 5.56 mm ( 0.22 in ) </Td> </Tr> <Tr> <Th> Barrels </Th> <Td> Single barrel 1 : 12 '' and 1 : 7 '' twist options </Td> </Tr> <Tr> <Th> Action </Th> <Td> Gas - operated , rotating bolt </Td> </Tr> <Tr> <Th> Rate of fire </Th> <Td> 450 -- 650 rounds / min </Td> </Tr> <Tr> <Th> Muzzle velocity </Th> <Td> 970 m / s ( 3,182 ft / s ) ( M193 ) 945 m / s ( 3,100.4 ft / s ) ( SS109 ) </Td> </Tr> <Tr> <Th> Effective firing range </Th> <Td> 460 m ( M193 ) 800 m ( SS109 ) </Td> </Tr> <Tr> <Th> Feed system </Th> <Td> 30 - round detachable box magazine ; proprietary or STANAG magazines </Td> </Tr> <Tr> <Th> Sights </Th> <Td> 1.5 x or 3x optical sight ; back - up iron sights </Td> </Tr> </Table>
<Table> <Tr> <Th colspan="2"> SAR 21 </Th> </Tr> <Tr> <Td colspan="2"> The SAR 21 with the attached Round Corner Firing ( RCF ) module </Td> </Tr> <Tr> <Th> Type </Th> <Td> Bullpup assault rifle </Td> </Tr> <Tr> <Th> Place of origin </Th> <Td> Singapore </Td> </Tr> <Tr> <Th colspan="2"> Service history </Th> </Tr> <Tr> <Th> In service </Th> <Td> 1999 -- present </Td> </Tr> <Tr> <Th> Used by </Th> <Td> See Users </Td> </Tr> <Tr> <Th colspan="2"> Production history </Th> </Tr> <Tr> <Th> Designer </Th> <Td> Tuck Wah Chee and Felix Tsai of Chartered Industries of Singapore ( CIS , now ST Kinetics ) </Td> </Tr> <Tr> <Th> Designed </Th> <Td> </Td> </Tr> <Tr> <Th> Manufacturer </Th> <Td> CIS : 1999 -- 2000 ST Kinetics : 2000 -- present </Td> </Tr> <Tr> <Th> Produced </Th> <Td> 1999 -- present </Td> </Tr> <Tr> <Th> Variants </Th> <Td> See variants </Td> </Tr> <Tr> <Th colspan="2"> Specifications </Th> </Tr> <Tr> <Th> Weight </Th> <Td> SAR 21 : 4 kg ( 8.82 lb ) SAR 21 GL / M203 : 5.3 kg ( 12 lb ) SAR 21 P - Rail : 3.6 kg ( 7.9 lb ) SAR 21 MMS : 3.5 kg ( 7.7 lb ) SAR 21 Light Weight Carbine 3 kg ( 6.6 lb ) </Td> </Tr> <Tr> <Th> Length </Th> <Td> 805 mm ( 31.7 in ) ( SAR 21 , SAR 21 40 GL / M203 , SAR 21 P - Rail ) 680 mm ( 26.8 in ) ( SAR 21 MMS ) 640 mm ( 25.2 in ) ( SAR 21 Light Weight Carbine ) </Td> </Tr> <Tr> <Th> Barrel length </Th> <Td> 508 mm ( 20.0 in ) </Td> </Tr> <Tr> <Td colspan="2"> </Td> </Tr> <Tr> <Th> Cartridge </Th> <Td> 5.56 × 45mm NATO </Td> </Tr> <Tr> <Th> Caliber </Th> <Td> 5.56 mm ( 0.22 in ) </Td> </Tr> <Tr> <Th> Barrels </Th> <Td> Single barrel 1 : 12 '' and 1 : 7 '' twist options </Td> </Tr> <Tr> <Th> Action </Th> <Td> Gas - operated , rotating bolt </Td> </Tr> <Tr> <Th> Rate of fire </Th> <Td> 450 -- 650 rounds / min </Td> </Tr> <Tr> <Th> Muzzle velocity </Th> <Td> 970 m / s ( 3,182 ft / s ) ( M193 ) 945 m / s ( 3,100.4 ft / s ) ( SS109 ) </Td> </Tr> <Tr> <Th> Effective firing range </Th> <Td> 460 m ( M193 ) 800 m ( SS109 ) </Td> </Tr> <Tr> <Th> Feed system </Th> <Td> 30 - round detachable box magazine ; proprietary or STANAG magazines </Td> </Tr> <Tr> <Th> Sights </Th> <Td> 1.5 x or 3x optical sight ; back - up iron sights </Td> </Tr> </Table>
what is the back up sight used in sar 21 in the event of optical scope failure
what is the back up sight used in sar 21 in the event of optical scope failure
iron sights
iron sights