Hello again.
I have a medium sized mill that I haven't used enough to know what to search for as far as steel choices.
I am planning to copy a very expensive forward-assist housing for a couple of Hk rifle builds that I am working on. Basically, it is a rectangular bar a few inches long that will be radiused down its length on one of the narrow sides (probably with a rotary table) , and grooved with an end-mill or ball-mill on the other. This housing will be then be tig welded to the hk reciever. My main concern will be to achieve a decent outside finish (on the radiused and flat sides) as long as the steel is fine for the application.
Nobody seems to know the exact carbon content of the receivers, but I have seen the number 4140 kicked around as a guess. I cannot find 4140 at my online supplier, and have no local suppliers.
Any input on the correct steel? Thanks for any help!
I have a medium sized mill that I haven't used enough to know what to search for as far as steel choices.
I am planning to copy a very expensive forward-assist housing for a couple of Hk rifle builds that I am working on. Basically, it is a rectangular bar a few inches long that will be radiused down its length on one of the narrow sides (probably with a rotary table) , and grooved with an end-mill or ball-mill on the other. This housing will be then be tig welded to the hk reciever. My main concern will be to achieve a decent outside finish (on the radiused and flat sides) as long as the steel is fine for the application.
Nobody seems to know the exact carbon content of the receivers, but I have seen the number 4140 kicked around as a guess. I cannot find 4140 at my online supplier, and have no local suppliers.
Any input on the correct steel? Thanks for any help!