Can't remember how low it was before but $69 now. Beware, seller fluctuates price all the time. He probably watches our notifications which are of course advertised beyond forum members (I checked all the time before becoming a member).
For the tinkerers amongst us, I think it’s still the best value in the sub-$100 bracket. So much potential. Ditch the fiber filter in the valve, open up the airways, and polish up the trigger components. Added cost? $0 and some time. To make it even more enjoyable, swap out the spongy poppet with Delrin or PET-P or PEEK and fit a shortened MDS nylon or PEEK hammer. Then drill and tap the end cap for an RVA and remove the rear cocking pin to convert it to cock-on-open. Cocking effort goes down to one finger and the shot cycle is so sedate that you just might fall asleep at the bench. Not to mention the CO2 or air savings.
Hi Earl, There are a few directions this could take depending on how much effort you want to put into it and how refined you want the results to be. For example if this is for short-range indoor duty (10m), you may want to just try backing off the hammer spring until the velocity drops to where you want it. Two ways to go about it. Either clip coils (tedious trial and error approach, but easy) or do the RVA mod so you can adjust it on the fly…it’s so handy. We are talking about a 1/3 reduction in energy so it would be operating at a state of partial valve lock which is great for efficiency but the ES will not be so good. At short distance it may not influence the POI enough to matter. Notice I also stipulated indoors because the temperature dependence of CO2 would make it sensitive to temperature changes. I mean the ambient temperature only. Any self-cooling would be drastically reduced. A better solution would be to incorporate an SSG. That will allow you to stop the CO2-wasting hammer bounce. However it will still be subject to the high ES if you simply reduce hammer strike to get the velocity down from 620 to 500fps. Install a slightly smaller transfer port to accomplish that. In other cases using an O-ring buffer (bstaley) between the hammer and the valve stem would be a simpler alternative to the SSG, but the QB is not a candidate because the backer block behind the valve leaves very little of the stem protruding. Yet another option would be to install a harder poppet and a lightweight hammer. That will likely leave a bit of hammer free flight (like an SSG without the SSG) to eliminate hammer bounce, with the added benefit of vastly easier cocking and a very pleasant shot cycle absent of all the vibration. It’s hard to appreciate how nice it can be until you experience it.BTW you may want to post this question in the PCP gate where more tuners can see it and pitch in.
Advertise Here
Share This! Share This!