Four screwdrivers works. So does the *handguard tool* which resembles a coathanger, but is heaverier, and usually runs between $10-$20. We had the tapered slip ring on the XM177 *Car 15*, too.
The thing not discussed is that a lot of gun stores have “build classes” where if you buy your parts from the store, they will hold a class and you can use their tools to complete your lower and/or upper.
Another thing not discussed is the Delta ring that holds the stock AR upper and lower handguard together. You really need a friend or a special tool to take it off. I have gotten one off with a vinyl padded jar opener, but they have better tools.
The problem with the AR is that you will likely spend a fortune customizing it.
Four screwdrivers works. So does the *handguard tool* which resembles a coathanger, but is heaverier, and usually runs between $10-$20. We had the tapered slip ring on the XM177 *Car 15*, too.