The slick slide is actually the original design by Stoner . Think about it ? the assist is a unnecessary item , gets in my way ! Release your bolt unassisted & your cartridge is fed with more power than a assisted plunger will ever do . Let the bolt carrier do what it was built to do ! Cleaning is simpler & doesn’t knock MY arthritic knuckles .. Tom hasn’t given me any extra perks ! Yet , ! But ya never know .. my birthday is soon ! Also the Boron nic . Bolt is super nice . Shipping was quick, packaging was excellent & they are real People! Thanks to Tom & Company !