Here is a forward latching pneumatic speargun by member ECK from Russia. With two grip handles and a shoulder stock the gun can be shot like a shoulder gun, hence the impressive looking layout.
https://forums.deeperblue.com/threads/im-from-russia.107405/#post-962312
I have seen this gun on the Russian websites and I thought that I had responded to this above post, but it looks like I was somehow interrupted at the time and then forgot. This impressive looking gun is a forward latching gun as can be seen by the rod under the barrel running up to the muzzle and the fore grip handle has a guiding tunnel for the rod to pass through. The gun has a big air tank to lower the compression ratio and is for sniper style shooting using two hands and the gun braced against the shoulder. This a good setup for shooting a big heavy shaft as gun recoil is better absorbed and controlled by the large gun body and the diver's grip on it.
https://forums.deeperblue.com/threads/im-from-russia.107405/#post-962312
I have seen this gun on the Russian websites and I thought that I had responded to this above post, but it looks like I was somehow interrupted at the time and then forgot. This impressive looking gun is a forward latching gun as can be seen by the rod under the barrel running up to the muzzle and the fore grip handle has a guiding tunnel for the rod to pass through. The gun has a big air tank to lower the compression ratio and is for sniper style shooting using two hands and the gun braced against the shoulder. This a good setup for shooting a big heavy shaft as gun recoil is better absorbed and controlled by the large gun body and the diver's grip on it.