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Field Strip & forend spacer replacement: Winchester Model 37A - 20 gauge single-shot shotgun

Texas Gun Vault

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In this Field Strip video, I demonstrate how to properly disassemble and reassemble the Winchester Model 37A, a classic single-shot 20-gauge shotgun. Although it closely resembles the earlier Winchester Model 37, the 37A features several design changes and should not be confused with its predecessor. Despite its simple design, there are a few details worth knowing before taking one apart for routine maintenance.

In addition to the complete field strip, I also replace the factory plastic forend spacer, a part that is commonly found cracked or broken on these shotguns, with a modern aluminum replacement. This upgrade restores the shotgun's functionality while providing a much more durable long-term solution.

This video demonstrates the way I disassemble and reassemble this firearm for routine maintenance and cleaning. Your method may vary

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In this video there are absolutely NO gun sales, NO links to gun sale, and NO information about gun sales. This video is for entertainment purposes only.

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20 Comments

@gozur7374 2 years ago

I inherited one of these shotguns from my father in law.

Had it completely restored (had not been shot in years) and safety checked.

I am passing it along to my son.

Great family heirloom.

Thanks for the video. It helps a lot!!!

@markprescott6477 9 months ago

THANK YOU SO MUCH for making this video. 42 year old guy here who has had a 37a .410 ever since my Dad gave it to me used when I was a kid. This morning I got it out, and for whatever reason, it would not break open fully. I thought I was going to have to take it to a gunsmith and I found your video and I had it fixed in 5 minutes. I also was able to reset my extractor, which hasn't worked right my whole life. It works perfectly now. I cleaned and lubed everything when it was apart and now it opens up just like butter. Thank you so much, Merry Christmas to you, fixing my old childhood shotgun made me so happy this morning.

@josephv3849 2 months ago

Thank you for making this video. My dad died in a fire and when we opened the safe, I’m the only one with military background so everyone gave me all the guns. This was one of the guns that he had and I had no idea how to even open it lol so thank you for the video.

@ThreadedNail 1 year ago

Ive used one of this gun since I was a young kid. They are great guns! I came here because I want to refinish the stock.

@brianwhitnel8161 2 years ago

Wanted to say thanks for this video. My wife inherited a 410 from her Grandfather with this same broken piece. Had no idea what it was called or where to look for one. Looked up Numrich and got the anodized aluminum piece. Fit perfect and everything works as it should now.

@thatfordude 1 year ago

Thanks for the help 🙂

@myglober 10 months ago

My grandfather raised me, and when he passed, i was given his guns. This one was his favorite, and im looking for a new space plate. It seems very common for it to crack. After 6 years, im finally restoring it. It was in great shape anyways though.

@ETHRON1 1 year ago

Sir...awesome. Like you I deal with other weapons and such, my wife's brother gave her a model 370 20 gauge single shot and like you I had no idea how to break it down..when I searched yt your video was the first of the list...thank you. Will add it to my gun tech list for future reference...thank you.

@bobbyscott8024 2 years ago

My Uncle had one among his numerous Doubles and Browning Auto-5's in 16 ga. and my brother-in-law has a 12 ga. I remember seeing these when they first came out in ''The Progressive Farmer'' and thought they looked great with their engraving on the receiver and the gold trigger! Offsprings of the Model 37 Steelbilt! Congrats on a nice Single-barreled shotgun!

@thecamerashyhuntingfishingguy 2 years ago

These were a copy of the Canadian made Cooey mode 84/840 the spacer was metal and so was the trigger guard until Winchester took over the factory and switched to plastic . Mid to late 1960s if I recall

@Westernsforever 10 months ago

I have a twelve gauge my brother gave me and I replaced a few things on it, will always keep it since it’s the last thing he gave me before he passed!

@andrewsteele7663 3 years ago

Good morning, Jason, great gun, perfect for home defense if you can get the 20g ammo. Here in the real world of Oz, 20g ammo is bit like Dorothy's shoes, rare. It's also brilliant that you are giving the venerable gun an overhaul. Keep bringing out the quality video's Cheers.

@JW007100 7 months ago

Bought one new back in 1978ish? for $50.00 It’s residing in the bottom of Steamboat Lake , Colorado. Long story short my brother had to let go of it so we could swim for shore. “ Killer Canoe “ tried to drown us that day. A series of dumb moves led to us capsizing. We lived to tell about it. Miss that shotgun. Had a kick to it with a 30” full choke.

@ChaabanChaaban-tc6vj 1 year ago

روعة❤❤❤❤❤❤❤❤❤

@richardbreting9641 2 years ago

I did this very repair on my mid-70s Winchester model 840. Used the same part from the same vendor. Mine is a 12 gage and kicks like a mother………..

@bomcdaniel3005 10 months ago

What was that website you mentioned that sells that aluminum replacement part?

@7.5l 1 year ago

ممكن تصور كيف يعمل سبرنق الشوزن 37

@aaronalvarezlara3829 1 year ago

Hablo español yo tengo una así eccelente

@elizabethguerrerosilva9176 2 months ago

Hola soy de chile tengo la misma escopeta pero se me perdió una pieza q va entre el guardamanos si me podrías compartir las medidas exactas para mandarla hacer ya q esa pieza no la venden en chile