Yes, I think a post on the QB78 is very appropriate. I have a couple of forum friends who recently bought the QB78 for the sake of getting into air gunning without taking the plunge into PCPs. They've been very pleased with the QB78 and appreciate all the mods that are available.

 

The AR2078 has a gas venting feature. See page 7 here...

http://www.flyingdragonairrifles.or...m Bulk fill adaptor The AR2078A,standards than are applied to QB-78 rifles: its

A QB78 can be modified similarly, by drilling a hole in the tube just rear of the valve body. A rod is inserted into the hole and levered against the valve stem, dumping residual Co2.

~20 years ago I fixed the wandering zero issue I had on my Crosman 160 by replacing the flimsy plastic OEM barrel band with a steel one I made. It's a slip fit over the barrel, and the lower part is split at the bottom and secured with a cap screw. This clamps the band securely to the gas tube, and the barrel can't be bumped out of alignment.

 

Hey, kind of slow around here, and I found some older pics of the QB-78. This was back when I got it, and I put a cheap Umarex 4X scope on it with the included rings.

But it does give someone who is considering this gun some semblance of what they could expect of it. This was about 30 yds, using Crosman Premiers (top), RWS Superdomes (lower left), and the RWS 7g wadcutters.

Some good groups, some not some good, but I think the bad groups were on me.


Anyway, like I said in the OP, I'll try this again with a better scope, and some H&N pellets.

 

Beeman - nobody there

I have a Beeman 2078A that the sear spring in the trigger assy broke.
After many calls to Beeman they finally answered. They agreed to send me
a spring as they could not be ordered. About 5 weeks later I received a package
that contained 2 o-rings but no spring. I have been calling 3 different phone numbers
for at least 6 months that all go to the same woman that never answers. So now
I have a $200 rifle that will not operate without buying a whole new trigger
assembly for the lack of a little spring.

 

38-45 Sorry to hear of your delema. Beeman is only the importer, they didn't make the gun. The QB78 (I am no expert) goes back to the 1960s and was originally a Crosman design. The gun itself has been made in Asia and imported by various companies over the years.

This guy Steve Archer used to be the guru but he about 100 years old if still alive and I think other people are running the business. I know someone that recently bought parts from them and it went well.

https://www.archerairguns.com/qb78-airgun-parts-tools-s/22.htm

If you do a thorough search you will find more sites. There were a million of these made before Beeman ever entered the picture.

Good luck

 

QB 78

Thanks for your reply.
I contacted Archer first and they said only the complete trigger assy could
be ordered. As my post said Beeman finally agreed to send me a spring but didn't.
Even their sales number goes to that woman's mail box that never answers.
I have not found any other site to order small parts from that list the sear spring that
can be ordered. I looked on ebay for a spring to modify and not knowing if they
would work and were about $10.

 

Did you try looking in the 'spring bin' at the local hardware store?
Often the coil springs in pens or lighters can be used for guns.
I save springs whenever I find them or disassemble stuff to throw away.
Get creative.
If you provide the measurements of that spring here somebody may be able to find a replacement.