HPA converted SMK QB78

[--ped--]

it's bulkfill co2 not air i'd say and SHOULD NOT BE FILLED WITH UNREGULATED AIR ABOVE 1100PSI-they start to get valve lock around 1250psi anyway
you can get pcp tubes but without much alteration the 78 isn't suitable for air unless it is regulated fed by a paintball bottle or similar
if it's a std length cylinder it will just have the cap which could be a converted original a Gmac one a Porky Yorkie or one of mine
if it is a long tube one then porky yorkie came up with them to be either bulkfill or 4 caplet(the robber copied his idea when he was a member of UKCAF and why he isn't well regarded by most on there)
if the cap looks to be an original steel one with just the foster fitting added them it will likely be a dual bulk or capsule one
if it has a brass inner with a std steel retainer it's probably a gmac half conversion
if it has a brass retainer and inner a full gmac one
if it has a brass retainer with aluminium inner(some i anodisedblack) and two orings it could be one i made

[Neil54]

I agree it sounds like a bulk fill end cap.
You can fill it compressed air to 1000psi. You will only get 5 shots.

[Lawrie Amatruda]

Could someone please explain the benefits of conversion from Co2 to air?

Cheers, Lawrie

[derekm]

Could someone please explain the benefits of conversion of Co2 to air?

Cheers, Lawrie

There's nothing wrong with CO2 for even the above the average shooter!

[--ped--]

Could someone please explain the benefits of conversion of Co2 to air?

Cheers, Lawrie

i don't think there is on a 78 unless you're using a remote tether from a large regulated cylinder from a static position
the 78 imo is better on co2 ,bulkfilling only brings the cost down
the 79 now is better with a 13ci paitball tank fitted -very large shot count and fps spread is very low,nothing really req to alter on a std gun(i personlly swap the gas block bolts to UK sourced ones

[Neil54]

Could someone please explain the benefits of conversion of Co2 to air?

Cheers, Lawrie

Cheaper to fill.
Not prone to power fluctuations with temperature.

I like mine on CO2 12g capsules.

[Neil54]

Oh yes, more shots per fill.