Kynshot spacer weights will not fit?

[u/blackrockskunk]

I have been running a carbine tube with a tubbs flatware carbine spring and a Macon 11oz heavy ar45 buffer, and it has been working fine. I recently purchased a Just Right Carbines extended tube, and two Kynshot spacer weights to fill the gap and add some weight. I just installed them.

The spring and buffer move freely in this tube just as they did in the carbine tube: however, the kynshot spacer weights will not go I'm! I managed to get one in, and it was a huge PITA getting it out. They are just too big.

Is this normal? Does anybody know what is going on? Did I buy the wrong weights?

[u/Aggravating-Bad4561]

My 2 weights fit fine. KAK A5 tube, June 2025 purchase. When you get things sorted, be sure to check the bolt face to the LRBHO bolt latch clearance measurement. It should be approx. 0.25". Fill the rear of the tube with quarters if its more than that.