Windham Weaponry AR-15 MCS Multi-Caliber .300 AAC KITMCS3Blackout/7.62X39mm Upper Receiver Assembly Kit For .223/5.56KITMCS3
Specifications And Features:
 Windham Weaponry KITMCS3
 MCS Multi-Caliber Conversion Kit
 .300 AAC Blackout/ 7.62X39mm Soviet
 16" Chrome Lined 4150 Chome Moly Vanadium Steel
 Manganese Phosphate Finish
 Rifled Appropriately For Intended Caliber
 Upper Receivers Are CNC machined From Forged 7075 T6 Aircraft Aluminum
 Hard Coat Anodized Matte Black
 Bolts Are machined From Carpenter 158 Steel
 Railed Gas Block
 A2 Flash Hider
 Matte Black
Fits:
 Standard Pattern AR-15 Lower Receivers
Includes:
 Complete Flat Top Upper Receiver With Integral railed Fore End And Proprietary Barrel Release Lever And Barrel retaining Block 
 .300 AAC Caliber Barrel
 7.62X39mm Caliber Barrel
 .300 AAC Blackout Complete Bolt Carrier Group
 7.62X39 Bolt
 7.62X39 Magazine
 Note That The 7.62 Bolts Are Marked With 3 Rings Behind The Locking lugs So as Not To Be Confused With The .300 AAC Caliber Bolt.
Manufacturer: Windham Weaponry
 Mfg Number: KITMCS3
                            
                         
                        
                            
    
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