Are you needing LOP for the youth model or the full size? Henry is a very well built firearm and can easily be something that you would pass down. The Marlin 39A is a very heavy Lever action and they do not offer a youth model.
Also, due to Marlin being bought out and moved they are concentrating on Bolt guns and finding a Marlin lever gun in any caliber is pretty difficult.
They did actually make a mountie 39a which is about the same size as a Henry .22.
By all means buy your son the Henry. Depending on his size you may want to go to the adult size rifle. I own the H0001 and the LOP is 14". Not too sure about the youth model LOP though. If he has the arm length I would recommend the adult size rifle as then he wouldn't 'outgrow' it.
Henrys are terrific rifles. The lever action is incredibly smooth and the accuracy right out of the box is spot on. I made only one adjustment (one notch of elevation) and shoot a constant 2 - 3 inch pattern at 50 yards with the iron sights. The quality of the Henry and the fit and finish is second to none, and if this is a factor with you they are made in America of 100% American materials, hand made one at a time. This is truely a rifle your son can own and pass down the line.
One thing to consider about a lever action over a semi-auto is that your son won't be doing 'mag-dumps' with a lever action rifle. I feel that by using a lever action it slows you down just enough to increase your focus...but that's just me. I also own a Marlin. I've owned it for a couple of decades and it still runs ammo well, but there is NO comparison in quality between it and my Henry. The Henry is also lighter...perhaps a factor for your son.
One other note I would add is that you can pick up the phone and call Henry and ask to speak with Anthony Imperato (owner president and CEO of Henry), and if he's around he will take your call. I've tested that customer service claim twice. He took my call both times. I don't think that would happen with any other manufacturer. There was nothing wrong with my Henry at all, but I'm a bit of a skeptic when it comes to claims of customer service of that level. He also responds to emails quickly as well.
I know I probably sound like a commercial for Henry, and I don't make it a habit to throw around praise needlessly, but you will not regret buying your son a Henry. Actually, once you've held a Henry and fired one you may find yourself buying one for you. I'll be adding a Golden Boy in .38 spl./.357 mag. to my safe very soon.
Buy your kid a marlin or other quality firearm. Then he'll have a firearm he'll be proud to pass to his children or grandchildren.
Buy your kid a marlin or other quality firearm. Then he'll have a firearm he'll be proud to pass to his children or grandchildren.