Help me make a decision on a 1377

[Mosin Marine]

On the fence about getting a 1377 and turning it into a carbine. Help me make my decision! Whats your favorite modification on your 1377 and why? Whats the average cost to upgrade a 1377 to be a good backyard pest bird killer?

[tennx]

I havent done the math on my builds.....somebody may break it down for u...but u need to check out crosmans custom shop....serious deals to be had closer we get to Christmas....I have several CCS guns and some were better deals....good luck

https://www.crosman.com/custom-shop/

[JimQwerty123]

Brandon,

I converted a 1377 to a carbine a couple of years ago but I didn't keep track of the cost. I added a metal breach, 18" Crosman barrel, new barrel band, and a shoulder stock. It's accurate and easy to pump. I don't have a crony so I can't give you FPE but I have taken pest birds out to about 15 yards with head shots. I have not tried longer shots at pests. Accuracy out to 25 yards is good, for me in the 3/4" range (that's good with my eyes). I also added a TKO LDC.

If I had it to do over again I would go with Crosman Custom Shop 1300KT. Last year CCS had a great Black Friday sale.

Jim

[tennx]

Brandon,

I converted a 1377 to a carbine a couple of years ago but I didn't keep track of the cost. I added a metal breach, 18" Crosman barrel, new barrel band, and a shoulder stock. It's accurate and easy to pump. I don't have a crony so I can't give you FPE but I have taken pest birds out to about 15 yards with head shots. I have not tried longer shots at pests. Accuracy out to 25 yards is good, for me in the 3/4" range (that's good with my eyes). I also added a TKO LDC.

If I had it to do over again I would go with Crosman Custom Shop 1300KT. Last year CCS had a great Black Friday sale.



Jim

I believe last Christmas I got my 1300KT with camo stock and 18” barrel for less than $100...using code and free ship Friday...I think I ordered 3 guns in all

[WesBob]

1322 is a great option as well, might be a little easier to get the foot pounds you'll want for pest birds. Steel breech is probably the main one to get and maybe a 15" or so barrel. I found the stock 10" barrels to be very accurate though out to 40 yards. The longer barrel will give you some more velocity though. I've heard 18" is optimal for velocity gain. With the new stiffer plastic pistons they come with now, going the flat top route doesn't really make the same gains they used to unless you plan to pump a lot more than 10 pumps. With the 1322 putting a lighter valve spring in and drilling the transfer port out a bit helps a little. If I was going to get one again I'd probably just get the steel breech, a 15-18" barrel, and call it good, maybe put a red dot sight on it. Nice gun for birds out to 30-40 yards ☺️

[WesBob]

Hopefully others will chime in!
I've done lots of mods on these guns. Longer barrel, flat top piston and valve, probe extension to push pellets in further, rva/power adjuster. I also used a 2100 tube to give a longer pump stroke for more power. I made a pumper pcp with an auxiliary tank coming out the side of the valve, experimented with different sizes. Settled for a 12g co2 adapter to give either a air pumped 10 shot string using an empty co2 cartridge or a 40 shot co2 string. I gave that one too my dad and he has shot a few grouse with it. He likes the co2 option and in colder weather he pumps it up to bring the pressure back up on the co2 ☺️. I never thought of doing that, mixing gases, but apparently it works well. It has a pressure gauge so he can tell how many pumps to top up with. Anyway that's getting a little over the top for modding, lol😊

[Viper1357]

I recently converted one of my 1377's (just have 2) to a little carbine by adding a steel breech (the long one), a 14" barrel, and the butt stock grip combination. No internals modded at this time.  Nothing real fancy, but it's a nice combo.


Here's some numbers off the chrony from just last week.


Description: crosman 1377 w/ 14” bbl. 10 pumps - cphp 7.9 gr.

#     FPS    FT-LBS      PF
5     553      5.37     4.37   
4     549      5.29     4.34   
3     557      5.44     4.40   
2     554      5.38     4.38   
1     556      5.42     4.39   

Average: 553.8 FPS
SD: 3.1 FPS
Spread: 8 FPS

------------------------------------

Description: crosman 1377 w/ 14” bbl. 10 pumps - cp pointed hunting 7.4 gr.

#    FPS     FT-LBS      PF
3     570      5.34     4.22   
2     571      5.36     4.23   
1     572      5.38     4.23
   
Average: 571.0 FPS
SD: 1.0 FPS
Spread: 2 FPS

--------------------------------


Description: crosman 1377 w/ 14” bbl. 10 pumps - h&n sp match green 5.25 gr. alloy

#     FPS    FT-LBS      PF
4     652      4.96      3.42   
3     651      4.94      3.42   
2     655      5.00      3.44   
1     653      4.97      3.43
   
Average: 652.8 FPS
SD: 1.7 FPS
Spread: 4 FPS

-------------------------------------

[Tater]

I'd start with a custom shop .22 with a steel breech.
Mine's a .177 but I only use it for chipmunks and hosps. Added a TKO and an R. Arms Innovations AR stock.


                 

[maraudinglizard]

I rebuilt my rear cocker 1377 a few years ago and have about $280.00 tied up in it. I would go with the custom shop for starters and go from there.  I am getting about 615 to 620 fps with a FTP and valve. I can reach out to 50yds for target practice and whack pests up to 25yds.

50yd target.

[Hoosier Daddy]

Whats your favorite modification on your 1377 and why?
Whats the average cost to upgrade a 1377 to be a good backyard pest bird killer?

I would say the best mod for a 1377 costs absolutely nothing. Sand and polish the trigger and sear contact points, squeeze the spring to lighten it's weight and put a spent .22 LR case in it as a spring guide.
 The steel breech would be my #1 purchased mod. Better (solid) barrel retention, 3/8 dove tail for optics, and it's STEEL not plastic.

Average cost? HA the sky's the limit. You can easily double the initial purchase price modding one.
I've got more in the grips and pump handle than I paid for the gun.
Mine sports a 14.5" barrel, BSA RD30 optics, and a Alchemyairworks muzzle break. Down and dirty I'd say close to $200 total but one piece at a time.

I am going to politely disagree with WesBob, .177 is fine for birds,If you want to go after squirrels or Bunnies, a .22 would be better.
 "177 for feathers- 22 for fur".

[Mosin Marine]

1322 is a great option as well, might be a little easier to get the foot pounds you'll want for pest birds. Steel breech is probably the main one to get and maybe a 15" or so barrel. I found the stock 10" barrels to be very accurate though out to 40 yards. The longer barrel will give you some more velocity though. I've heard 18" is optimal for velocity gain. With the new stiffer plastic pistons they come with now, going the flat top route doesn't really make the same gains they used to unless you plan to pump a lot more than 10 pumps. With the 1322 putting a lighter valve spring in and drilling the transfer port out a bit helps a little. If I was going to get one again I'd probably just get the steel breech, a 15-18" barrel, and call it good, maybe put a red dot sight on it. Nice gun for birds out to 30-40 yards ☺️

I would go with the 1322 but i illinois it considered a firearm so i would have to have it sent to a ffl, not to mention crosman wont send us here in illinois anything other then .177 because the law seems to confuse them lol

[Mosin Marine]

I recently converted one of my 1377's (just have 2) to a little carbine by adding a steel breech (the long one), a 14" barrel, and the butt stock grip combination. No internals modded at this time.  Nothing real fancy, but it's a nice combo.


Here's some numbers off the chrony from just last week.

Thank you for sharing that information, did you notice a difference after the mods vs before?

[Mosin Marine]

I'd start with a custom shop .22 with a steel breech.
Mine's a .177 but I only use it for chipmunks and hosps. Added a TKO and an R. Arms Innovations AR stock.


               

Thats a sharp looking rifle jerry! I didn't know TKO made a moderator for the 1377!!!! How quite is it? As for the .22 crosman wont sent me anything larger then .177. I tried to buy a rifle in .22 once, i even gave them a address to a ffl dealer i wanted it shipped. They told me the ffl dealer had to buy the rifle from them then i had to pay back the ffl business. I informed them that is not how this works lol. So after that i learned crosman doesn't want my direct business here in Illinois unless it was a .177

[Mosin Marine]

I rebuilt my rear cocker 1377 a few years ago and have about $280.00 tied up in it. I would go with the custom shop for starters and go from there.  I am getting about 615 to 620 fps with a FTP and valve. I can reach out to 50yds for target practice and whack pests up to 25yds.

Thanks Kris,Whats a FTP?

Whats your favorite modification on your 1377 and why?
Whats the average cost to upgrade a 1377 to be a good backyard pest bird killer?

I would say the best mod for a 1377 costs absolutely nothing. Sand and polish the trigger and sear contact points, squeeze the spring to lighten it's weight and put a spent .22 LR case in it as a spring guide.
 The steel breech would be my #1 purchased mod. Better (solid) barrel retention, 3/8 dove tail for optics, and it's STEEL not plastic.

Average cost? HA the sky's the limit. You can easily double the initial purchase price modding one.
I've got more in the grips and pump handle than I paid for the gun.
Mine sports a 14.5" barrel, BSA RD30 optics, and a Alchemyairworks muzzle break. Down and dirty I'd say close to $200 total but one piece at a time.

I am going to politely disagree with WesBob, .177 is fine for birds,If you want to go after squirrels or Bunnies, a .22 would be better.
 "177 for feathers- 22 for fur".

Thank you scott for that information  on how to mod it some without spending nothing! Its going to come in handy.

[CraigH]

I would definitely begin with a Crosman Custom Shop 1300KT - steel breech and the tube is not roll stamped.   Interestingly my 1322C which I bought a while back when the .22 was reintroduced is laser engraved like CCS guns.   Current 13XX pistols I have seen in stores are roll stamped.

[WesBob]

Good points about the free trigger mods. Forgot about those. The other nearly free mod is to drill a hole in the centre of your back cap and tap it then put a bolt in the back for a power adjuster. If it's a smaller bolt you can use a 22 short casing or cut down 22 casing for a spring guide. If you tap it for a bolt a little larger than the hammer spring then you can change hammer springs on the fly as well if you wanted.

[tennx]

I would add , I sure wish crosman would offer the fatty forearm again, even if it was just in the CCS...no longer made...but I did read that Alliance may be offering them up in 2018...for now there are some good looking walnut on Ebay....

PS to the OP....not a bad deal here and its ready to go..Im tempted...


http://www.airguns.net/classifieds/show_ad.php?adNum=152425&adSort=search&StartingAd=0&NumberOfPages=1

[Hoosier Daddy]

Thank you scott for that information  on how to mod it some without spending nothing! Its going to come in handy.

Here is the video that helped me out on what to do. While it is a 2240 shown, the exact same applies to a 1377.




Here is mine, not a Carbine though. but still a sweet shooting pistol.

[Mosin Marine]

Thank you scott for that information  on how to mod it some without spending nothing! Its going to come in handy.

Here is the video that helped me out on what to do. While it is a 2240 shown, the exact same applies to a 1377.

Here is mine, not a Carbine though. but still a sweet shooting pistol.

Thank you!

[mobilehomer]

Definitely a CCS gun. You can get up to a 18" barrel. Lothar Walther barrels in 14.6" length. Another big plus is that you can then order CCS parts later. Like a .22 barrel. They might not sell the gun, but maybe the barrel!