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All Online Orders Are Taking A Minimum of 7 Days For Processing And Delivery. Thank You For Your Patience. Any Cancelled Orders Will Result In A 20% Cancellation Fee!
We Currently Have A Great Inventory Of Rifles, Shotguns & Handguns In-Stock Here At The Store!
All Ammunition Purchases In NYS Must Be Picked Up In-Store! We are currently offering the NYS Concealed Carry Class! Go to www.topguntrainingli.com
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Mfg Item #: 81000077
The MR556A1 Upper Receiver Kit includes a complete upper receiver/barrel assembly bolt carrier assembly buffer and buffer spring allowing most high-quality 5.56 mm AR-style rifles to be retrofitted to HKs pusher rod system. - Complete MR556 Upper Receiver/Barrel Assembly HK 16.5 inch cold-hammer forged barrel upper receiver with forward assist extended convertible charging handle HK Free Floating Rail System handguard - Complete MR556 Bolt Group Assembly - Tungsten Filled HK Proprietary Buffer - HK Proprietary Buffer (Action) Spring