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Firearms
RIFLES
AR Style Rifles
AK Style Rifles
Bolt Action Rifles
Lever Action Rifles
Pump Action Rifles
Semi Auto Rifles
Single Shot Rifles
HANDGUNS
Semi Auto Handguns
Revolvers
Single Shot Handguns
Derringers
AR Style Pistols
AK Pistols
SHOTGUNS
Pump Action Shotguns
Semi Auto Shotguns
Side By Side Shotguns
Over Under Shotguns
Lever Action Shotguns
Single Shot Shotguns
Bolt Action Shotguns
One Stop, Every Firearm
Whether you’re after precision, power, or versatility—we’ve got it all.
View All Firearms
Optics & Sights
Red Dot
Scopes
Thermal Imaging
Range Finders
Ammo
Rifle Ammunition
Handgun Ammunition
Rimfire Ammunition
Other Ammunition
Reloading
Parts & Accessories
Gun Parts
Magazines
Lights
Holsters
Concealed Carry Holsters
Services
Gunsmithing
Cerekote
Laser Engraving
Custom Rifle Build
About
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MR556 A4 Upper Receiver
MR556 A4 Upper Receiver
Availability
catagories
Manufacturer
Action
Barrel finish
Barrel Length
Blade Length
Blade Material
Bullet Caliber
Bullet Weight
caliber/guage
Capacity
Case Material
Cost Per Round
Grains
Length
Lumens
Magazine
Magnification
MOA
Model
Model Fit
objective size
Power
Price
Quantity
Rate of Twist
Resolution
Reticle
Shot Size
Shot Weight
Sights
Sights Type
Sound Species
Sounds
Species
Thread Pattern
Unit per Box
Youth Rifle
Youth Shotgun
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HECKLER AND KOCH (HK USA) MR556A4 UPPER KIT 5.56MM 11″
$
2,179.00
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0
out of 5
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HK MR556 A4 COMPLETE UPPER – RECEIVER 5.56 16.5″ BARREL
$
2,179.00
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0
out of 5
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