NUPROL/Bocca Viper Suppressor for the HellBoy M4 Co2 Airgun

I bought a new accessory for my HellBoy M4 from a UK seller on Amazon.ca.
It is a NUPROL Bocca Viper Suppressor, and it looks awesome attached to the muzzle of my HellBoy M4!!!

 After firing a few dozen rounds through my HellBoy M4, I am pretty sure that the discharge sound is louder with this foam lined faux suppressor attached to the muzzle than without it?
Perhaps, since it is made for .24cal/6mm airsoft barrels, and this is a .177cal/4.5mm steel BB barrel, it may act like an amplifier instead of a suppressor.

I didn't buy it to suppress sound, I bought it to make my HellBoy M4 look extra cool!

Now I just need to fix the charging handle spring and my HellBoy M4 will be fully functional again, even if the charging handle is just a cosmetic component.

A.V HellBoy M4 Tactical Co2 rifle gets a Quad-rail Handguard!

I've written about, and photographed my Air Venturi HellBoy M4 Tactical .177cal. Co2 BB Rifle a number of times.

It is one of my favorite AirGuns, although, I wish I could upgrade it for .22 caliber lead roundball, instead of .177cal/4.5mm steel BB.

Presently, my HellBoy M4 has an aluminum alloy quad-rail handguard with my angled forgrip attached, and the stock has a US Army rubber buttstock recoil pad.

Any one of my gun lights work with this AirGun, and are much easier to use now that the quad rail is on the gun.

HellBoy M4 tactical Co2 airgun

I didn't think that I would ever buy a .177cal/4.5mm steel BB-only long gun. Pistols are fun, but a BB only smoothbore long gun is not very practical in my opinion...

...but the only semi-automatic Pellet firing AR-15 style Co2 long gun on the market was SiG Sauer MCX, and that requires a P.A.L to own in Canada.

Then Air Venturi and Pyramydair announced their new steel BB M4 co2 semi auto "tactical" AirGun!

I easily talked myself into placing a pre-order, and I am glad, because it is a fun AirGun to customize and shoot.

HellBoy M4 upgrades:foregrip & rail

There are a few upgrade options for the HellBoy M4.
The handguard can be replaced with a quad rail handguard, or other styles.
A picatinny rail can be attached to the stock hand guard.
A foregrip and tactical light can be attached once the rail is on the handguard.

I bought a variety pack of different lengths of  picatinny rails from Amazon for $15.

I attached the second shortest rail to the underside of the handguard so I can mount a pistol light.


I bought a few items to upgrade my HellBoy M4 off of eBay recently.
They are all coming from China, and only the M4 Spanner wrench has arrived, with a vertical grip handle and an aluminum alloy 6.7" quad rail foregrip are still "in transit".