This is as short as you will find for an AR15 pistol buffer system. AND this buffer lets you use ANY standard bolt carrier. Just remove your existing pistol buffer tube etc... And put this one on. It is like new. It was mounted and test fired about 20 rounds then removed. $100 Cash. If you want it, text to 78five47zero1nine7six. If $100 is too much, then make me an offer. Would consider trading for an optic/scope like a fixed power. 4x32 or something similar. These are very hard to find at this price. If you have an AR15 pistol then you know what this is. If you want one of the few super short ar pistols then here is your chance.