Strike receiver extension - Strike Industries AR Receiver Extension w/7 Positions Ver.II

This is a very nice extension with some great enhancements. One of those enhancements is a modification that I have made to other extensions on my AR builds. Filing a notch in the front of the extension allows you to screw in the extension further and better capture the buffer retainer . This piece already has an extended notch which you can use to hold the detent down by rotating it slightly either way. This is extremely handy if you are changing buffers and springs. The extra position also gives more adjustability then you would expect.