Lets start off at the beginning.... First round jamed so bad I had to bash open the carrier , second round jamed because the carrier was farther then the feed latch by 1/4 inch it was touching the plug so as it would cycle the next one in the tube the carrier would not return. ... fixed that issue with a file and stones . Next was the entire carrier the latch has so much play it would slip past and never engage .Jam again I had to manually release it ..Fixed that by bending the latch ear over into a sweet spot ... Then as I was testing with dummy caps the trigger jamed up . Punched the pins and there it was the complete carrier was broken off due to the thin tin material used again because of to much play in the latch Keep in mind these are not solid pins there rolled tin I could move the latch 2/16 eacb way ... also as the carrier would spring up to feed in the new shell it would over travel past the stop point again because of so much play and jam the carrier upwards.... When fired the i would get zero ejection of the spent shell and double feed ...
Second garbage DA shotgun first was the grizzly mag fed total jam-0-junk now the cougar also junk never again will I spend a dime on there arms
As for you're question it would not cycle any round properly 2 3/4 or 3
Also nothing was spec ... rails dont fit extended tubes dont fit correct ... forgrips a no go ... there specs are whatever they feel like that day and all parts are made on different days .... There was absolutely no way this was function tested before it left the factory because out of the box it never worked I should have left ot alone and sold it or sent it back.