The Daniel Defense Big Hole Flat Top Upper is designed and built with a .315 front pin hole to fit the early Colt lowers with .315 front holes. This eliminates the need to use an offset pin, which requires 2 screwdrivers during assembly / disassembly of these rifles. This upper comes with a .315 Push Pin, which makes the assembly / disassembly of the upper and lower quick and easy. It has a detent ball to hold the pin securely in place.
This upper comes complete with forward assist, ejection port cover Indexing Marks and M4 Feed Ramps for reliable feeding.
– CNC Machined – Aircraft Grade 6061-T6 Aluminum – Military Specification Type III Hard Coat Anodizing
– Weight: 8.5 oz. – Color: Black
10 × 3 × 3 in
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Daniel Defense Big Hole Upper Receiver, M4 Feed Ramps for sale.