Nielsen Gun Parts is a Danish company specialized in designing and manufacturing suppressors. Among their products, there is a family of multi-caliber hunting rifle suppressors called Sonic GHOST. These silencers utilize quite a simple system that allows to assemble them so that they perfectly fit any particular caliber.
As you know, often times it is possible to shoot a smaller caliber ammunition through a suppressor design for a larger caliber cartridge. Although it is practiced by many shooters it is still a subject of a debate. Will the use of a suppressor designed for a larger caliber provide the same level of sound suppression when shooting smaller caliber cartridges through it? Well, theoretically it shouldn’t. However, many people argue that the differences are so insignificant that you can’t even distinguish them without measuring by a decibel meter. Apparently, the designers of Nielsen Gun Parts think that it is important to have a suppressor matching the caliber of your rifle.
The Nielsen Sonic GHOST suppressors come with four color-coded perforated tubular inserts which allow tailoring the suppressor to 6mm, 7mm, 8mm or 9.5mm calibers. The holes in the actual baffles are drilled to fit the outside diameter of these inserts. Matching to any specific caliber is controlled by the inside diameter of the tubular inserts.
The process of changing the calibers is pretty easy and straightforward. All you need is to unscrew the end cap (which is actually the end chamber), remove the installed insert, replace it with one that matches the caliber of your rifle and fix it in place by screwing back the end cap. Once the insert is installed its holes get located between the baffles as shown on the cutaway image embedded below.
Here is also an animation of the insert changing process.
Nielsen Sonic GHOST Suppressors are made of high strength aluminum. The advantage of using aluminum is the light weight of the end product which is one of the most important features of a hunting suppressor. These suppressors weigh 300 or 385 grams (10.6 and 13.6 oz) depending on the model. Of course, the disadvantage is the inability to shoot multiple rounds in a quick succession through such a suppressor. However, for the majority of hunting scenarios that should not be a concern.
The company makes two versions of these suppressors called GHOST 40 and GHOST 50. The main difference between the two models is the outside diameter (40mm and 50mm respectively). GHOST suppressors also have a reflex design where the first expansion chamber telescopes over the barrel. The overall length of these suppressors is about 10″ (250 mm) but thanks to the reflex design they add 5.5″ (140mm) to the overall length of the rifle.
Unfortunately, the company doesn’t have a US distributor. By visiting the websites of their distributors in European countries you will see that the prices vary from $309 to $535 depending on the model and the country they are sold in.
Images from www.nielsengunparts.com