I bet it's a Spanish action, have a look at the rhs of the rear tang below stockline, it will say 'Spain'. Yes it's a commercial large ring m98 action, average quality, doesn't look like one of the good Santa Barbara's, that said, it's still better than any new tikka, sauer, blaser, howa, remmy, etc.
Yes, trigger can be adjusted ok, but not magnificently, I'd buy a timney or recknagel from brownells U.K. Parker used the trigger side safety not the military flag, Google any Mauser military action and you will see the commercial bolt shroud is different as are not formed and in turn don't have a rear hold for the blag safety stem.
Stocks - if you really must, don't bother with a cheap synthetic as they bend like butter. Either get a decent walnut stock or order a boyds,,,they might not ship outside the us anymore though..there are other well priced options, have a look at brownells and see if you can find something there. I assume it's the buttstock and comb you find like. You will need to bed a new stock to it, but it's easy as pie and you can do a great job for under £10 in materials. The barrel might also need to be inletted with a channel cutter or wet/dry and elbow grease.
The be trigger you have goes back and joins the rear action screw hole which is awful and really bad for bedding, any new stock will not be inlet for this but a new trigger solves this headache. Therefore, a new trigger will also not sit well in your existing stock. A new trigger and stock also means you need a rear action screw hole pillar, easy and cheap of course, but important to avoid compression and create consistent barrel harmonics.
my view - keep it as it is and work with the existing stock by altering pad or lop or adding a cheek weld raiser, etc and fine tune the trigger. If barrel is good and rifling crisp with no crazy throat or muzzle erosion, and it shoots average, bed the front receiver ring and first 2" of barrel and float it, that will have it shooting very well usually, which I've done to average shooting old mausers many many times.
figure out how to make it work as is, it's probably not an action worth an investment in stock and trigger exceeding £200.
The belgian action is also commercial but made by FN, but is very different in bolt handle design and was machined to exceptional tolerances and is one of the finest ever made, actions alone being worth £500+. Only beaten by pre war oberndorf sportier actions of course. Either of these would justify building a rifle on them of £5000-£30,000.
, if it is then a Mauser 98 large ring action,
