i have fitted a theoben gas ram to a bsa goldstar air rifle and the recoil is so bad the telescopic sight move as i take a shot.any ideas?

cc, June 2008

Check the scope mounts. Some have an anti-creep screw in the base that can be tightened down against the top of the scope rail. If your's isn't fitted with one of these, you can easily drill the mount and tap out the alloy so that a suitable grub screw can be used. 4mm or 5mm and around 16mm in length would be fine also, I would grind the end of the screw to a slight point (not a sharp one) just to aid it's grip on the top of the scope rail.

cobelec, February 2009

this is often the case with gas rams, they cause more vibration than a bullet rifle.

fitting a quality arrestor block and mounts will help stop the scope moving (i always recommend sportsmatch type)

sadly, the vibration will still pass through into the scope and can cause your cross hairs to snap and can even loosen the internal lenses. dont worry though, if your scope is decent quality it should be ok.

if the problem persists take the gun and scope into a professional gunsmiths for a fitting. they will also detect if your scope has received any damage.

personally, id just stick the spring back in the gun

ps, i am a gunsmith and a shooter and have seen this problem before

aj, November 2008

I had same prob,am afraid ure stuck with the recoil,on mine it actually moved the scope back so much it hit the stops and dug in.Dunno if u can fit wider scope clamps for more grip.

D, July 2008