The Big Pivot AD20.5 back spacer is great. It fits perfectly and was incredibly easy to install, it just slides over the factory barrel spacers so only one scale needed to come off. It was the last mod I did aThe Big Pivot AD20.5 back spacer is great. It fits perfectly and was incredibly easy to install, it just slides over the factory barrel spacers so only one scale needed to come off. It was the last mod I did afThe Big Pivot AD20.5 back spacer is great. It fits perfectly and was incredibly easy to install, it just slides over the factory barrel spacers so only one scale needed to come off. It was the last mod I did after scales and a deep carry clip and was exactly what I was looking for. ter scales and a deep carry clip and was exactly what I was looking for. fThe Big Pivot AD20.5 back spacer is great. It fits perfectly and was incredibly easy to install, it just slides over the factory barrel spacers so only one scale needed to come off. It was the last mod I did after scales and a deep carry clip and was exactly what I was looking for. ter scales and a deep carry clip and was exactly what I was looking for.