GG&G Mount
Huge improvement over the stock rear sight and pic rail that comes on the 1301. Lowers the dot for co-witness and cheek weld. Much cleaner sight picture and comes up faster naturally. I used a Swampfox dot instead of RMR but the footprint is the same. They are $140 from GG&G, $50 on sale is a steal!!! Looks to have great finish and machining.