2019年12月16日 · At least some of the mods (the smoothing/polishing/deburring) go a long way towards making the rifle easier to work on (as it will stop chewing up o-rings during your take downs and reassemblies) and are worth doing even if power is not on your mind.

2025年2月2日 · Mods . Beeman QB78 mods are highly regarded, from simple to full-on PCP conversion power upgrades. Without any doubt, there is no fear of the shooter for any breakage during modifications. Therefore, it is safe to modify the …

2015年6月10日 · However, if you are considering using the stock QB valve for .257 caliber, then the mods. I have outlined are about as far as you can take a stock QB78 valve, aside from enlarging ports more so. Also, not sure you want to use a setpoint much higher than 1500-1700 psi on the QB's, maybe the Cothran tube allows for higher pressures?

SMK XS 78 +TH/QB 78 or 79+ Tuning kit. Professional Tuning Kit without the DVD (Video is on this site to view for free, so making it easy to fit. Just replace the new modified stuff for the old that you have taken out.

SMK QB/XS 78/79 Modified easy fit Safety catch follower. I have made this with a much more pronounced, rather than the standard sharp pip. Makes operating the safety catch smoother and easier to fit and...

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Tips for changing the standard reservoir to our XS 78 QB 78 reservoir (longer tube). To find the piercer adjustment, us 4 dead Co2 bottles to get the correct adjustment. Using dead or used Co2 bottles will prevent you accidentally piercing one of the new ones, which could be dangerous.

2008年8月7日 · By the way, all the usual mods to a qb are needed to make this really worthwhile as just upping the hammer spring power is not enough on it's own. Bear in mind you can go over 12ftlbs so use a chrony!

2009年5月24日 · Having said that lets see if some of the confusion regarding modding airguns (in particular QB family) can be cleared up. very simplistically the the QB family of guns falls into 2 distinct catagories. the above includes QB78's....QB79's and AR2078's. So.........if you buy one in .177 it can be (or SHOULD be) registered.