You're almost there. An AR style frame & stock adapter (to fit your Magpul grip/stock, custom LW barrel and a Leupold of some sort should round it out nicely.

 

There are rabbit holes all over the place! Be vewwy, vewwy careful.

 

I have one and the only thing I did to it was I bought a 3d printed scope mount for it. with ten pumps I can get a 1in group if I do my part. I only have a 1x pro lass tasco on it. It's a backyard squirrel/cottontail assault tool nothing more.

 

I should wash my mouth out with soap for suggesting cheap options, but the stock sear spring for the 1377 is almost stout enough to sub in for coil springs on the back of my pickup truck. ACE hardware has a spring with much lighter gauge wire, almost exactly the same coil diameter, and maybe half an inch (or less) longer than the stock sear spring. Just dropping that ACE spring into your 1377 will cut your trigger pull down to something like 1.5 pounds. Because it's so light, that ACE spring can bow rather than compress in a linear way, so I also grabbed a 1/4" piece of brass tube about an inch long and stuck it on the anchor lug that the spring goes over to act as a guide for the spring (or you can drill out an empty 22lr shell which also works). More simple and quick to do than the time it takes to explain it.

That ACE spring won't make the trigger pull any more crisp - you'll need an aftermarket sear for that - but for less than $5 and a trip to ACE, it's a huge difference for the better on pull weight.

Abandon all hope, ye who descend into the madness of Modmania . . .

https://www.rimfirecentral.com/threads/1377-adjustable-sear.1227609/#post-12397369

https://www.rimfirecentral.com/threads/pandemic-plinkin.1214677/?post_id=12187849#post-12187849

 

I started my shooting interest with a 130 in 1964, as a 13 year old.
In the intervening years, I’ve owned some of the most sensational firearms ever created.
I still see the current rendition of the 130 as a worthwhile item to own, and might get another one before I croak.