The LanTac UAR is a next generation AR-15 upper receiver with many unique features that make this product one of the most revolution AR-15 parts on the market today.
The most notable innovation utilized in this upper receiver is the patent pending SMOOTHCAM system. What separated this cam pin for a standard AR-15 cam pin is that it has a domed head. This domed cam pin, combined with a special upper receiver make for a reduction in friction, meaning that your rifle will operate smoothly.
LanTac finishes these UAR upper with a unique process. The UAR uppers are precision machines with a special burnished bore. The reason why they do this is to give the upper a compacted internal surface with a roughness average 2-4x smoother than standard milled upper receivers. This affects you as a shooter by offering you reduced friction and smoother operation.
To ensure that this upper has the maximum accuracy potential the barrel extension surface, bore and barrel nut threads are all machined in a single operation. This is done to decrease the chance of error and to give you perfectly concentric and perpendicular surfaces to mount your barrel to.
The cam pin and cam pin recess area are known to be an area of high friction in the AR-15. For this reason LanTac has redesigned these to components to offer a lower friction alternative. The cam pin recess was re-engineered to have a smooth surface that flows into the main reciprocation channel. This provides an optimal surface for the LanTac domed cam pin and together they make for a minimum of internal wear.
The proprietary domed cam pin from LanTac has no moving parts, which means there are no extra parts to break or malfunction. The cam pin is machined from 17-4 stainless steel and hardened to H900. The domed head of this unique cam pin is polished to a smooth finish to prevent any uneven wear. The unique structure of this cam pin allows it to operate in a completely different position than a traditional cam pin. The radius of the head curves away from the receivers internal surface compared to a traditional setup where the cam pin would have a hard or sharp edge on it upper corner, which can cause excessive wear.
The LanTac UAR includes a CP-R360 domed head polished cam pin.