I received a LDC from Frank Jones. This is my thoughts on this LDC for my Crosman 1300kt 22 caliber. The LDC is 3/4 OD. While not as quiet according to Frank as some of his other products Frank felt those that own the Crosman pumpers and C02 guns would appreciate the smaller size and it does not interfere with CO2 cartridge changing. It fits on the barrel nicely with a snug fit and is held in place by 2 Allen Head (hex key) set screws.
Taking the front sight off the Crosman was easy using a piece of wood dowel and a plastic head hammer and a couple of light taps it was off. It is just pressed on.
Now for the testing. I shot my 1300kt with out the LDC and at 10 pumps it makes a noticeable snappy sound. Using the LDC the sound was a dull thud. The pellet hitting the phone book I was shooting into made more noise I thought that the 1300kt going off. This does work well.
I definitely am satisfied with this product and it will be reasonable in price too in the 35 to 40 dollar range.
Frank, also makes bolt handles and probes, safeties and straight stocks for 13/22xx as well as some other parts and mods. He is working at getting a web page going but for now can be contacted on Face Book. Look for Frank Jones and a Don't Tread On Me avatar.
If you want to quiet down your 1300 platform this is a well made and a affordable priced product.
One final thing this LDC does not affect accuracy my test shots were side by side of each other touching.
Some pictures.