Chrome-lined barrels still need outer surface protection, normally achieved by some manner of Parkerization. No one really knows which is truly the better treatment (chrome plating vs nitride). Heat+ pressure = barrel killer. may see a hard life of training, 4150 CMV can be an excellent choice. One of the biggest differences in cheap versus high-end AR-15s is the quality of the barrels. However, in the case of a good chrome lined barrel, you'd have to put it in a machine rest beside a match grade rifle with a stainless barrel to be able to tell the difference. properly chrome lined or nitrided, a 4150 CMV barrel can have a very long life depending on its firing. Most barrels that you see marketed as Chrome lined or Nitrided are made from a 4140 or 4150 CMV steel. Surplus military A2 and A1 barrels … For the majority of us, chrome lined barrels will fulfill any possible SHTFantasy we could imagine while also remaining hard use for frequent practice. Our nitrided barrel are accurate guaranteed up to 1 MOA at 100 yards (with decent ammo) that you can still load up some 100 round drums and shoot down a tree, but also get some accuracy for distance; then this is your barrel. Chrome lined barrels will last the and are the easiest to clean but are the least accurate. 4150CMV steels have a higher surface hardness due to the increased carbon content in the steel (0.5% instead of 0.4%) which is desirable. Every other one I own of over two dozen is stainless. Personally I would go SS everytime and not even blink. We are going to cover the pros and cons of Mil-Spec chrome molly steel chrome-lined barrels versus match-grade stainless steel, non chrome-lined barrels and help you make an educated decision on which is right for the intended purpose of your next AR-15. Another great attribute of 4150 CMV steel is its impact resistance. schedule. For a hard use rifle that. Keep in mind, an unlined I own exactly two chrome moly barrels on AR's. Depending on your barrel twist, load, and firing pattern, you can expect to get at least 2x the life from a Chrome-lined AR barrel. The “don’t fix it if it isn’t broke” folks who love their chrome-lined barrels will keep buying what they like. Then we would suggest our AR-15 4150 CMV Nitride black barrels. Nitriding won’t put chrome-lined barrels out of business. They also have a Chrome-lined chamber--critical in a grab and go rifle as it is much less likely to rust or suffer from neglect over time. Prices range from $150-$280 for a chrome lined barrel. I have yet to wear out a barrel where I felt the accuracy had degraded enough to worry about. Now, I have a 16" carbine non-Chrome lined chrome moly button rifled barrel on my Delton and a 16" carbine chrome lined hammer forged barrel on my Spikes/Daniel Defense AR and I cannot tell the differences between the two at 100 yards when firing from a bench rest as they are both about the same as accuracy goes. Most ar BHW tubes. If your building a precision rig,then the barrel is more import of a factor as your shot groupings are a major concern.For an AR,I would use what you can get thats been a tried and trued brand,I've had good results from both a non-lined DPMS and a chrome lined RRA also.IMHO SS vs. chromoly for a barrel and chrome-lined vs. standard all have there pros and cons.if you want …

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