Need a high quality stripped upper receiver without being overpriced? Then look no further. The Colt M4 stripped upper receiver is everything you would expect from a Mil-Spec part. The upper is forged 7075-T6 Aluminum and features M4 feed ramps and a type III hard anodized finish. The upper readily accepts any standard AR-15 barrel and barrel nut. Furthermore, the upper features a flat top design which means there is a picatinny rail designed for mounting various sights and optics.
Specifications and Features:
Colt SP63528
AR-15/M4 Stripped Upper Receiver
Includes Dust Cover
Includes Forward Assist
Flat Top Upper Receiver
M4 Feed Ramps
7075-T6 Forged Aluminum
Hard Coat Anodized
Matte Black Finish
Specifications and Features:
Colt SP63528
AR-15/M4 Stripped Upper Receiver
Includes Dust Cover
Includes Forward Assist
Flat Top Upper Receiver
M4 Feed Ramps
7075-T6 Forged Aluminum
Hard Coat Anodized
Matte Black Finish
Is this marked with C and is the picatinny spaces marked?
Answer:
This is a current production Colt OEM stripped upper. Roll marks an indexing marks are determined by Colt's current production specs.
Would this fit a Colt SP1 model AR? Would this require a new barrel with the M4 ramp?
Answer:
This is a stripped upper. It will fit any mil-spec AR-15 platform lower receiver. It's recommended to install a barrel with M4 feed ramps.
Will this fit a 6551 older colt if I use an offset adapter?
Answer:
Yes, if you have an older Colt with a different size pin, than a pivot pin adapter should allow you to mate a modern upper to your lower receiver.