NcStar Upper Receiver Block for AR-15
Upper receiver block is designed to fits AR-15/M4 receivers to help with assembly and general maintenance of AR receivers.
The modular upper receiver block can be used in several ways for many different maintenance tasks
You may use just the lower half of the block by attaching it quickly to the upper receiver with the two provided receiver pins
This allows you to clamp the AR upper receiver to a vise for maintenance work
Bolting the two halves of the upper receiver block fully supports the upper receiver to prevent damage from torque twisting forces when installing or removing barrels from the receiver
The upper half of the block inserts into the receiver just like a bolt carrier group
The bottom half of the block can be bolted together with the upper half with the provided steel bolts
This fully supports the inside and the bottom of the receiver and it also leaves the receiver optics rail open for mounting accessories and optics
Unlike other upper receiver blocks that bolt/clamp to the exterior of the AR receiver
The upper receiver block also has a hole through the length of the block to act as a bore brush guide for cleaning out the bore of the barrel
Constructed with blue anodized aluminum.
Please note: If the listing says "In-Stock" it means we have all of the items in stock. Please check this LINK to view our most up to date shipping status.
Warranty, Returns & Terms:
MMC Armory offers a 30 day return, refund and exchange policy. You must email or call MMC Armory and obtain an RMA number prior to any return, refund, or exchange. All returns must include the original order number, receipt or invoice, along with the billing address, shipping address, contact phone numbers, contact emails, and RMA number. Returns, refunds, and exchanges may take up to two weeks, not including transit times, for processing after we receive it. Return shipping costs will be the responsibility of the returning party, with the exception of the wrong item being received or on warranty exchange during the first 30 days after delivery. Items returned for warranty will only be replaced or exchanged, not refunded.