okay heres the deal. one of my friends bought an ar from one of my other friends. he came to pick it up at my house today and brought along his keltec sub 2000 that he had bought earlier this year. he had not shot it yet so we took both rifles to go shoot a little. well i got to take the keltecs cherry.so i loaded, shouldered, took aim. and bang! the front sight post on the keltec shattered with the first shot....needless to say after ten more rounds we called it quits. as it looked like we had a shotgun at the 25 yrd line. any ideas why this may have happend? perhaps it was cracked to begin with? who knows. but now its on our list of parts.