Steel Breech Kit

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Steel Breech Kit
Add a durable dovetail rail to your 1377, 1740, 1760 or PC77

Availability: In stock


Now you, the airgun hobbyist, can attach your favorite dovetail accessories to your 1377, 1740, 1760 and PC77. This Steel Breech kit not only has a superior look, but it alleviates the need to purchase separate parts. With an all-steel construction, it provides durability which in turn may improve your accuracy. With just the use of the two hex wrenches included and a flat-head screwdriver, this breech will be attached and ready for your accessories.

  • This breech will not fit the older 1377 pistols with a sliding breech cover!
  • Does not support mounting of original rear sight
  • WILL support mounting of the LPA MIM sight
  • Dovetail groove

This kit may be attached to Crosman airgun model numbers 1377, 1740, 1760 and PC77.

Technical Specs
Caliber .177
Joules No
Steel Breech Kit is rated 4.8 out of 5 by 8.
Rated 4 out of 5 by from Steel Breech kit Original was ordered on 7/1/2017. By 7/6/2017 I had not received confirmation of order or any other communication. I sent an email canceling the order and placed another order which I received instant confirmation and the order was received about five days later. I installed the breech and was very pleased with it. On 7/20/2017 I received the original order with paperwork saying it had been canceled. Email to Crosman has gone unanswered. The order is being returned.
Date published: 2017-07-23
Rated 5 out of 5 by from Great ugrade Received the steel breech and have it installed - it's a great upgrade ! The only small problem was the instructions that were sent - evidently it's a copy of a copy of a copy - not only was it very light and hardly legible but the instructions were very very small print ! I found several links on utube that made the install very easy ! That being said - I'm extremely happy - this was an upgrade for my 1377 - I'll be ordering another one for my 2240 !
Date published: 2017-09-13
Rated 4 out of 5 by from Solid construction Works great with crosman target finder scope, I only wish crosman would make a rear iron sight to fit this breech. Sometimes I like to shoot open sights, and have to reinstall the original plastic breech. It would be a 5 star for sure if they made this possible. I know there,are after market sights I can use, but are extremely expensive.
Date published: 2017-10-26
Rated 5 out of 5 by from Great modification part I bought this simply to land a scope on my 1377. I have the newer model but had one of the original 1980's version when I was a kid. It was lost while I was in college. Anyway, I am teaching my youngest daughter gun safety and how to shoot. Not only is this a solid platform for a scope, it seems to have lived up to its reputation for a small increase in power as well. Please note that when you install it, make sure it is seated correctly on the air port. Youtube it. My first attempt at installing it was a failure. It actually looked like it was seated correctly but when I fired the gun, I could feel air around my hand. I had oiled the breach as well so I did see a pattern of oil blowing out where the two pieces mated. I took it apart and reset it and it performs nicely. It is well built and fits the gun perfectly. There are several videos to assist with install on Youtube. Fit and finish is really nice. Well machined and good tolerances. I would recommend this to anyone looking to mod their 1377.
Date published: 2017-11-16
Rated 5 out of 5 by from Priority Upgrade! I found that I gained fps while also increasing consistency in groupings at various distances. I later added weaver rail adapters and a truglo 1x30 red dot scope. This made it even more fun. Good squirrel gun.
Date published: 2017-08-07
Rated 5 out of 5 by from A worthwhile upgrade No only a better breech but it allows for mounting optics and with an adapter to weaver rail ghe possibiblities are endless.
Date published: 2017-11-03
Rated 5 out of 5 by from Does what it should for a value Love the ability to add scope or red dot ! Function like it should adds stability to the pressure
Date published: 2017-11-04
Rated 5 out of 5 by from Steel breech Ordering directly from Crosman yoy will get the steel breech for $35, but they will charge you $15 shipping, which is way too much imo. The breech is easy to install. After installing you have the choice of using the expensive rear sight Crosman sells, or you can use the 3/8” dovetail on the new breech to mount a pistol scope, which is what I did and why I wanted the breech to begin with. I purchased the Crosmam (Center Point Outdoors) pistol scope on eBay, but it comes with Picitinny rings, so you must also buy 3/8 dovetail rings for the 1” pistol scope to get in mounted onto the model 1377/ 1322 pistol. Once you you have that done you can sight the scope in and it will be quite an acurrate combo. The next thing you absolutly must do is install a lighter trigger spring in the pistol; this will make the combo much more acurrate due to the light pull; you won’t pull off target just trying to overcome the monstrously stiff spring Crosman installs in production. Remove the right grip to access the spring and pull the spring out. Find a spring of similar dimensions, but with about 1/2 the wire diameter of the original and install it. I just happened to find one that was the perfect tension for the job in my stash of spares. With much lighter, 3-4 lb trigger pull and the long 20” eye relief CPO Mod. 72004 2X pistol scope you will be able to shoot nickel size, or smaller groups using a rest and good quality pellets. The best I have found are the Crosman copper premium, which are very acurrate and you can also hunt pest birds and rats with them easily. I might also add that the addition of the steell breech will also add weight to the pistol making it feel heavier, but this adds to the acurracy. Have fun!
Date published: 2017-12-03
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