First reddit post. I dont keep count but around 750 rounds thru kuna. Have cleaned a few times. 124 blazer and pmc and 115 federal. All ammo has had failure to eject maybe 1 every 50-100 rounds. Have caught at least one failure on video. Have also had double feeds if thats what you call it when i load the first round with the charge handle, not sure if i should get in habit of using the bolt drop button instead to load; if thats is the correct way to load guns. Im somewhat new to shooting. Today i tried to clear a failure to feed and it fell behind bold, had to open up kuna to remove shell. Should i send it in to Springfield or should i try the $40 hbi short buffer kit first? I bought this because all i saw was videos saying how reliable it was and no malfunctions.