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gptkbp:instance_of
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gptkb:weapon
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gptkbp:accessories
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Two-point sling
Bipod available
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|
gptkbp:activities
|
Gas-operated, rotating bolt
|
|
gptkbp:caliber
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gptkb:7.62×51mm_NATO
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|
gptkbp:capacity
|
20 rounds
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gptkbp:cultural_impact
|
Featured in films and media
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gptkbp:date
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1960s
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gptkbp:designed_by
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gptkb:Eugene_Stoner
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gptkbp:field
|
Easily field-strippable
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gptkbp:historical_context
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Developed during the Cold War
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gptkbp:historical_event
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Sniper engagements in Vietnam
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gptkbp:historical_significance
|
Used by U. S. military snipers
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|
https://www.w3.org/2000/01/rdf-schema#label
|
M21 rifle
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gptkbp:impact
|
Available for civilian purchase
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gptkbp:is_compatible_with
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gptkb:battle
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gptkbp:is_similar_to
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gptkb:M24_Sniper_Weapon_System
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gptkbp:is_used_by
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gptkb:United_States_Armed_Forces
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gptkbp:length
|
22 inches
1,100 mm
850 m/s
1:10 inches
Chrome-moly steel
Heavy barrel
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|
gptkbp:lens_type
|
Scope mount available
|
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gptkbp:maintenance
|
Requires regular maintenance
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gptkbp:manufacturer
|
gptkb:Springfield_Armory
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gptkbp:market
|
Parts available on the market
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gptkbp:material
|
Wood or synthetic
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gptkbp:military_technology
|
Used in designated marksman roles.
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gptkbp:modifications
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Various aftermarket upgrades
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|
gptkbp:module
|
Limited modularity compared to modern rifles
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|
gptkbp:notable_features
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Adjustable rear sight
|
|
gptkbp:notable_users
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U. S. Navy SEA Ls
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|
gptkbp:production_years
|
1969-1980s
|
|
gptkbp:range
|
800 meters
|
|
gptkbp:rate_of_fire
|
20-30 rounds per minute
|
|
gptkbp:recoil
|
Moderate
Semi-automatic
Direct impingement
|
|
gptkbp:reliability
|
Generally reliable
|
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gptkbp:replaced_by
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gptkb:M16_rifle
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|
gptkbp:safety_features
|
Manual safety
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gptkbp:sights
|
Adjustable iron sights
Iron sights
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gptkbp:status
|
Surplus and collectible
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gptkbp:successor
|
gptkb:M14_rifle
|
|
gptkbp:training
|
Used in military marksmanship training
|
|
gptkbp:trigger_type
|
Single-stage trigger
|
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gptkbp:type
|
gptkb:weapon
|
|
gptkbp:used_in
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gptkb:Vietnam_War
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gptkbp:variant
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gptkb:M14_rifle
|
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gptkbp:weight
|
4.5 kg
|
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gptkbp:year_created
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gptkb:1969
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gptkbp:bfsParent
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gptkb:M14_clone_rifles
gptkb:M14_DMR
gptkb:M70_rifle
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gptkbp:bfsLayer
|
6
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