Complex sentence: After renting an AR-15 rifle and using it at the range, he did not attempt to buy the rifle, He however purchased a Remington 870 Express 12 gauge shotgun and two 15 round boxes of 00 buckshot shells.
Split into simpler sentences: After renting an AR-15 rifle and using it at the range, he did not attempt to buy the rifle,. He purchased a Remington 870 Express 12 gauge shotgun and two 15 round boxes of 00 buckshot shells.