Spot Hogg introduced their new MRT Pin Guard at ATA which is a complete redesign of the old housing to make it better and more effective than ever before when it came to the multiple pins. The issue before was that it was hard to center your peep over your housing since it wasn't exactly a circle so now the MRT Housing utilizes that concept making it more accurate, more easy to shoot, meaning a better chance to fill your tag! The Tommy Hogg is a great slider sight which utilizes a super smooth delrin slide as well as utilizes coarse micro adjustments so you can feel the movement. It's a great sight to pick up and enter into the adjustable sight world for sure! Not to mention Spot Hogg sights are practically bullet proof!