Based on popular carbine configurations, these XM177E2 Upper Receivers are ready for your next Retro build.
The muzzle of the XM177E2 Upper Receiver, is capped by the classic XM177E2 moderator inspired flash hider, with ports around its radius. This muzzle device is a flash hider, unlike the original XM177 muzzle device, which was technically a suppressor.
The flash hider is attached to a lightweight 11.5 or 12.7 inch barrel. Why 12.7 inch? The 12.7 inch model has its muzzle device pinned and welded in place, allowing the overall length of the barrel to reach the required 16” for a rifle.
Barrels are available with a 1-12 or 1-7 twist. Select 1-12 if shooting 55gr bullets, and 1-7 if shooting 62gr or heavier. The front sight base is not F-marked, meaning the round, tapered front sight post is properly in line with the carry handle rear sight. The black carbine handguards closely emulate the original CAR handguards. These barrel assemblies do have a tapered slip ring, which is proper on carbines of this type.
Mounted to the upper is a proper ejection port cover, with a flat external "bump" (not just an off the shelf A2). The receiver is the proper M16A1 style, with a forward assist but no shell deflector. The rear sight is the standard A1 aperture, that can easily be adjusted with a cartridge or tool. Included bolt carrier group is the proper manganese phosphate mil-spec BCG, with chrome lined interior.
Key features of the XM177E2 Complete Upper Receivers:
• M16A1 upper receiver without shell deflector
• XM177 flash hider with proper grenade ring
• 11.5” or 12.7” 5.56x45mm NATO barrel
• 12.7” configuration features a pinned and welded muzzle device, making it 16”+
• 1-12 or 1-7 twist & chrome bore & chamber
• M16A1 ejection port cover
• Tear drop forward assist
• A1 rear sight assembly
• Carbine black polymer handguards with heatshields
• Manganese phosphate mil-spec bolt carrier group with 9310 bolt
We actually tracked down the original company that manufactured the Colt® AR-15 optics of the 1970s and asked them to build a new one for us as close to the original as possible - right down the yellow inspection stickers. The Retro 4x Optic has updated technology under the hood, with modern lenses and construction. The result is a scope that looks just like the original but has optical clarity and performance that are head and shoulders above it.
• Attaches to any standard AR-15/M16 carry handle
• Fully Multicoated lenses are fog and waterproof
• BDC click-adjustable elevation turret
• Manufactured in Japan with high quality internals and lenses
• The Retro 4x Carry Handle Optic sports a simple, intuitive fine duplex reticle, like the original, and an elevation turret with BDC (ballistic drop compensated) clicks that closely match modern .223/5.56 55gr and 62gr ammo. As its name indicates, the Retro 4x comes with an integral carry handle mount that easily attaches to most AR-15 carry handles - no tools required.
As with all products we sell, this scope is fully backed by our Forever Guarantee.
