Phase 5 EN (Electroless Nickel Plated) Drop In M16 Bolt Carrier Group.
MADE IN THE USA
***NEW deburring / polishing process which creates a smoother
slicker more advanced finish.***
The EN plated Bolt Carrier Group enhances reliability, lessens cleaning time,
improves corrosion resistance and minimizes required bolt lubrication.
– EN plated bolt carrier, heat treated & hardened.
– Hardened gas key, grade 8 hardened fasteners, type III sealing
– Black phosphate HPT/MPI bolt and extractor with Mil-Spec gas rings.
Cleaning is minimal, usually requiring only a soft cloth. Permits firing for
longer periods of time between cleaning, as dirt and powder residue has
no wet or oily surface to cling to.
EN provides a high lubricity and low friction co-efficient,
greatly increasing the life expectancy of a firearm due to reduced friction wear.
Electroless Nickel Plating (EN) is an auto-catalytic chemical technique
used to deposit a layer of nickel-phosphorus or nickel-boron alloy on
a solid workpiece, such as metal or plastic. Electroless nickel plating
is an auto-catalytic reaction used to deposit a coating of nickel on a
substrate. Unlike electroplating, it is not necessary to pass an electric
current through the solution to form a deposit. This plating technique
is to prevent corrosion and wear.
EN electroless nickel plating has several advantages versus
electroplating, it provides an even deposit regardless of workpiece
geometry, and with the proper per-plate catalyst, can deposit on non-
***There has been a lot of talk about the pros and cons of staking the gas key on the carrier. Here is our opinion and why we do not stake keys. The US Mil Spec. assembly drawing requires the carrier key to be staked. Contrary to some popular opinions staking does not “SEAL” the gas key. Staking keeps the screws from backing out. Period. If you do not properly torque the screws to 35 inch pounds you will be staking a screw that is loose or one that is over torqued and prone to breakage. We have seen plenty of staked screws that are loose or broken. The Mil Spec. also calls for the gas key bottom surface to be“SEALED” with Permatex gasket sealer. Something no one does to our knowledge. Here is our procedure for installing a gas key. First clean the oil from the gas key and the mating surface on the carrier. Then clean the oil from the screw threads. We use Acetone for this. Next use a very light coating of Permatex high strength thread locker gel on the bottom of the key. PN 27010. This is much easier to use than the Permatex gasket sealer. It comes in a plastic twist dispenser. Make sure you don’t use so much that it squishes into the gas port hole. The cure rate is 60 minutes. Next coat the screw threads with the same gel. Install the key and torque the screws to 35 inch pounds. Should you decide to remove the key for some reason don’t use the old screws when you put the key back on! You will most likely break them during installation or when you fire the rifle. Go to the local hardware store and buy new 10-32 x ¼”SHCS. If you feel the need to stake the screws spend the money and get one of the staking tools from Brownell that uses a screw type system to swedge the material into the top of the screw. Don’t use a hammer and a punch! You can stretch the thread on the screw and now you have a loose screw that will eventually break if the gun even fires.***
Overall Length: 7.5 inches