Very nice!
I've not seen the 152, but I have a similar looking Mossberg .22 in a model 144.
Mine is a 7-round magazine and a bolt action.
Mossberg made some fine .22 rifles back in the day.
I haven't seen one of those in years, nice find. Mossberg made some fine rifles in the day, a good clean and lube and you should be very pleased with this gun
The fold-down forearm is nothing more than a built-in forward vertical grip.
My 144 has a slot built into the underside of the forearm for a vertical grip.
abeguzmanmarine, here are some details on your 152.
22 lr, 7 shot detachable box magazine. 18" barrel. Weight 5 lbs. Monte Carlo stock with pistol grip, hinged forearm pulls down to form hand grip, sling mounted swivels on left side of stock. No. S109 front sight, No. S108 receiver sight. Made 1948-1957.
GREAT LINK mkgr22
I haven't taken it out yet, but it looks like a keeper. Only problem is I bought 3 yesterday, told the wife I was only gonna keep 2.
I like all of em