Rigby, you might have to specify what you mean by "older" guns. As far as I have seen they honor all warrantees and grantees on any gun made after 1986. As for fitting barrels, as long as the gun was produced after 1986 I think they will fit barrels to it. On those with SB1 and some older SB2 receivers they will only fit "low intensity" barrels, .223, 45-70, shotgun and muzzloader, .44 Mag. 357 Mag (while they have them) etc. The "high intensity" barrels, .30-06, .308, .270, .280 etc can only be fitted to the newer SB2 receivers. It just takes a free call to CS to determine which receiver you have and what barrels they will fit to it. As far as I can see any receiver made after 1986 is OK to buy, I may be wrong but this is the inference I got from CS yesterday. OK guys, how about some info or clarification here. For some reason the year 1996/7 seems to have some significance but I can't remember what, straighten me out please...<><.... :grin: