LanTac USA CP-R360 Roller Cam Pin KIT 223 AR15 AR-15 M16 5.56 or AR10 7.62 (select size)
- Brass Finish, Works on All Mil-Spec BCGs
- Precise Manufacturing
- Long Term Reliability
- Durable Construction
High quality components and precise manufacturing make Lantac parts ideal for maintaining and upgrading firearms. The durability, reliability and excellent build quality of these parts will ensure years of service you can count on.
Cam pin wear is normal for all AR's. It is worse in piston guns do to the alternate operation, and is a result of the cam pin not being fully aligned behind the gas key. In a DI gun, gases inside the bolt carrier, pushing against the ring seals, thrust the bolt forward out of the carrier. This usually assures the bolt is fully extended before the lugs unlock and the complete BCG starts its rearward travel. In a piston gun, only the Bolt Carrier is being pushed back. Once the bolt has rotated and is free of the lugs, the carrier again is free to move rearward. However, in the piston system, the cam pin may or may not have reached its full travel, perfectly aligned behind the piston "gas" key. If not 100% aligned, the hardened square cam pin gouges into the softer aluminum upper, shaving the metal off (often seen as slivers inside the upper). The good news is it will not continue to wear once it gouges out enough clearance where the cam pin sits when the bolt lugs free from the chamber lugs in normal operation.
There are two things you can add to lessen the effect: First, a Lantac Roller Cam Pin which is round instead of square and rolls onto the portion of the upper where it would normally take chunks out. It will still wear this area a bit, but not nearly as much! Second is the Adams Arms bolt spring if it isn't already installed. This mimics the action in a DI gun where the hot gases push the bolt forward and achieve quicker and more complete cam pin alignment prior to releasing the carrier rearward. I recommend both for all Adams uppers and keeping spare bolt springs to replace after a couple thousand rounds.
This is a MUST HAVE UPGRADE in my book for all AR15 BCG's, but particularly for all piston uppers. This greatly reduces the wear from square cam pins that will create shavings in the upper as square cams create space for themselves. Unlike the POF version, Lantac does not require a modified Gas Key in an AR15 due to the incorporation of a flat surface.
Other carrier and bolt assembly parts not included.
NOW ALSO OFFERED AS CAM PIN FOR .308 AR10.